Shoestring2014 6-respiration
•Download as PPTX, PDF•
0 likes•449 views
This document summarizes research on the effects of nutrient addition on soil respiration in northern hardwood forests. It finds that: 1) Soil respiration and belowground carbon allocation declined with increasing soil nutrient availability across study sites. 2) The addition of nitrogen and phosphorus nutrients reduced soil respiration the most in the most infertile sites, likely by reducing belowground carbon allocation and root-associated respiration. 3) There were some indications that sites may have been co-limited by both nitrogen and phosphorus, as nutrient additions of both together had stronger effects on respiration in infertile sites than additions of either nutrient alone.
Report
Share
Report
Share
Recommended
Shoestring2014 5-decomp
Litter Decomposition Experiments Involving Young Technicians, Rick Biche and Team 2 (2012-2014), A. Crosby Kennett Middle School. Hubbard Brook Annual Cooperator's Meeting, W. Thornton, NH, July 10, 2014.
Hb2015 hayden-decomp
COOPERATORS' MEETING, Woodstock NH, Wednesday, 8 JULY 2015. Session l: Multiple Element Limitation Study Moderator: Ruth Yanai. Decomposition in the MELNHE plots: Filter paper and tea bags
Matthew Hayden, SUNY- ESF
Using a modified version of a new method called the Tea Bag Index, this study addresses two questions- will there be a noticeable difference in decomposition rates of tea across plots? and will the use of tea as litter be sufficient in identifying short term trends in decomposition?
Hb2015 holmes-mineralization
HUBBARD BROOK ECOSYSTEM STUDY, 52nd ANNUAL COOPERATORS' MEETING, Woodstock NH, Wednesday, 8 JULY 2015. Session l: Multiple Element Limitation Study Moderator: Ruth Yanai. Seasonal pattern of N mineralization in the MELNHE plots
Caitlin Holmes, MELNHE, cvholmes@asu.edu
I will compare N mineralization in three mature stands in the Bartlett Experimental Forest over the growing season. We are interested in observing a seasonal variance in N mineralization before and after nutrient manipulations are applied.
CaryPPT
Higher levels of total soil respiration were found in urban forests compared to rural forests. Three potential factors influencing this were examined: microbial biomass, root biomass, and earthworm biomass. Results showed microbial and root biomass did not differ between urban and rural forests. However, earthworm biomass was significantly higher in urban forest soils and correlated with higher soil moisture levels. This suggests the increased presence of earthworms in wet urban forest soils is the likely cause of higher total soil respiration measurements in these areas.
Hb2015 sadutto-calcium
Tyler Sadutto conducted a study to understand how the addition of CaSiO3 affects soil respiration. The objectives were to measure total soil respiration, fine root production, and microbial respiration in calcium and control plots. Total soil respiration was measured every two weeks using a LI-COR 8100 and soil collars. Fine root production was measured using root screens over three weeks. Microbial respiration was measured using a base trap method on soil samples from each plot. The expected results were a decrease in fine root production, microbial respiration, and overall total soil respiration with the addition of CaSiO3.
Biology - Ecosystems and communities 1011
This document discusses several topics related to ecosystems and communities, including relationships between organisms, community energetics, and the effect of nitrogen on forest stands. It provides data from two studies: 1) how tree growth in northeastern US forests responded to long-term nitrogen fertilization, showing that nitrogen increased aboveground productivity. 2) Measured leaf photosynthesis of pine needles in control and high-nitrogen plots. It also discusses the relationship between white pine needle health and ozone concentration among New Hampshire schools from 1991-2006. Needle health increased as ozone levels decreased from 2004-2006.
“Managed forest contribution to carbon sequestration under a rising carbon di...
“Managed forest contribution to carbon sequestration under a rising carbon di...Forest Landowners Association
Managed forest contribution to carbon sequestration under a rising atmospheric CO2
Objectives:
Forest carbon is a cycle
Define forest carbon sequestration
Summarize what is known about how rising CO2 affects tree growth and forest health.
Carbon management under rising CO2. What can be done to increase or enhance carbon sequestration?Hb2015 barner
This document summarizes Jerome Barner's master's thesis research comparing belowground carbon allocation in tree roots, microbes, and mycorrhizal fungi under different nitrogen and phosphorus fertilization treatments. The objectives are to determine how carbon allocation to fungal compartments responds to fertilization and how fertilization affects fungal species abundance and diversity. Methods include measuring fine root biomass, soil respiration, and sequencing fungal communities from ingrowth bags under nitrogen, phosphorus, and combined nitrogen and phosphorus fertilization at three forest sites. Expected results include decreased carbon allocation and fungal diversity under nitrogen and variable responses to phosphorus, with increased fine root biomass under both nutrients.
Recommended
Shoestring2014 5-decomp
Litter Decomposition Experiments Involving Young Technicians, Rick Biche and Team 2 (2012-2014), A. Crosby Kennett Middle School. Hubbard Brook Annual Cooperator's Meeting, W. Thornton, NH, July 10, 2014.
Hb2015 hayden-decomp
COOPERATORS' MEETING, Woodstock NH, Wednesday, 8 JULY 2015. Session l: Multiple Element Limitation Study Moderator: Ruth Yanai. Decomposition in the MELNHE plots: Filter paper and tea bags
Matthew Hayden, SUNY- ESF
Using a modified version of a new method called the Tea Bag Index, this study addresses two questions- will there be a noticeable difference in decomposition rates of tea across plots? and will the use of tea as litter be sufficient in identifying short term trends in decomposition?
Hb2015 holmes-mineralization
HUBBARD BROOK ECOSYSTEM STUDY, 52nd ANNUAL COOPERATORS' MEETING, Woodstock NH, Wednesday, 8 JULY 2015. Session l: Multiple Element Limitation Study Moderator: Ruth Yanai. Seasonal pattern of N mineralization in the MELNHE plots
Caitlin Holmes, MELNHE, cvholmes@asu.edu
I will compare N mineralization in three mature stands in the Bartlett Experimental Forest over the growing season. We are interested in observing a seasonal variance in N mineralization before and after nutrient manipulations are applied.
CaryPPT
Higher levels of total soil respiration were found in urban forests compared to rural forests. Three potential factors influencing this were examined: microbial biomass, root biomass, and earthworm biomass. Results showed microbial and root biomass did not differ between urban and rural forests. However, earthworm biomass was significantly higher in urban forest soils and correlated with higher soil moisture levels. This suggests the increased presence of earthworms in wet urban forest soils is the likely cause of higher total soil respiration measurements in these areas.
Hb2015 sadutto-calcium
Tyler Sadutto conducted a study to understand how the addition of CaSiO3 affects soil respiration. The objectives were to measure total soil respiration, fine root production, and microbial respiration in calcium and control plots. Total soil respiration was measured every two weeks using a LI-COR 8100 and soil collars. Fine root production was measured using root screens over three weeks. Microbial respiration was measured using a base trap method on soil samples from each plot. The expected results were a decrease in fine root production, microbial respiration, and overall total soil respiration with the addition of CaSiO3.
Biology - Ecosystems and communities 1011
This document discusses several topics related to ecosystems and communities, including relationships between organisms, community energetics, and the effect of nitrogen on forest stands. It provides data from two studies: 1) how tree growth in northeastern US forests responded to long-term nitrogen fertilization, showing that nitrogen increased aboveground productivity. 2) Measured leaf photosynthesis of pine needles in control and high-nitrogen plots. It also discusses the relationship between white pine needle health and ozone concentration among New Hampshire schools from 1991-2006. Needle health increased as ozone levels decreased from 2004-2006.
“Managed forest contribution to carbon sequestration under a rising carbon di...
“Managed forest contribution to carbon sequestration under a rising carbon di...Forest Landowners Association
Managed forest contribution to carbon sequestration under a rising atmospheric CO2
Objectives:
Forest carbon is a cycle
Define forest carbon sequestration
Summarize what is known about how rising CO2 affects tree growth and forest health.
Carbon management under rising CO2. What can be done to increase or enhance carbon sequestration?Hb2015 barner
This document summarizes Jerome Barner's master's thesis research comparing belowground carbon allocation in tree roots, microbes, and mycorrhizal fungi under different nitrogen and phosphorus fertilization treatments. The objectives are to determine how carbon allocation to fungal compartments responds to fertilization and how fertilization affects fungal species abundance and diversity. Methods include measuring fine root biomass, soil respiration, and sequencing fungal communities from ingrowth bags under nitrogen, phosphorus, and combined nitrogen and phosphorus fertilization at three forest sites. Expected results include decreased carbon allocation and fungal diversity under nitrogen and variable responses to phosphorus, with increased fine root biomass under both nutrients.
2021-04-29 - Guna Nachimuthu - Crop rotations in cotton systems
2021-04-29 - Guna Nachimuthu - Crop rotations in cotton systemsRiverina Branch of the Australian Society of Soil Science
A presentation of work on long-term rotations, soil biology, tillage, nutrient availability and compaction in northern cotton farming systems by Dr Guna Nachimuthu, NSW DPI Narrabri, to Soil Science Australia's Riverina branch workshop on "Parna and Cotton Soils" held at Yanco on 29 April 2021.Hb2015 phelps
This document discusses a study on how nitrogen (N) affects phosphorus (P) resorption and P affects N resorption in plants. Specifically:
1) The study found that P resorption efficiency was highest in plots with higher soil N, while N resorption efficiency was highest in plots with higher soil P.
2) Analysis showed N resorption efficiency correlated with higher green leaf P concentrations, while P resorption efficiency correlated with higher green leaf N concentrations.
3) This provides evidence that resorption of one nutrient is driven by availability of the other nutrient, demonstrating co-limitation between N and P in these forest ecosystems.
Hb2013 zahor transpiration
This study examines the impact of calcium addition on tree transpiration and root function in New England forests impacted by acid rain. Sapflux measurements showed higher transpiration rates in trees on plots with added calcium silicate compared to control plots, with the strongest response in American beech. Preliminary root analysis found higher live fine root tissue and lower embolism in yellow birch roots from the calcium treatment plot compared to the control in early spring. The study is ongoing across three sites on the White Mountain National Forest to further understand the mechanisms by which calcium impacts forest water use and health.
Hb2015 frewert and pannafino-mychorrhizae
HUBBARD BROOK ECOSYSTEM STUDY, 52nd ANNUAL COOPERATORS' MEETING, Woodstock NH, Wednesday, 8 JULY 2015. Session l: Multiple Element Limitation Study Moderator: Ruth Yanai. Mychorrhizal preference change in aspen: AM vs. EM and N vs. P
Austin Frewert and Jalina Pannafino, SUNY ESF
This study evaluates Ectomycorrhizal colonization in the different treatment plots by counting the number of EM root tips to determine if EM colonization is less pronounced with fertilization. Both Ectomycorrhizae and Arbuscular Mycorrhizae are evaluated on the root tips of Aspen in treatment plots where it is present.
Mycorrhizal presentation, Megan McLin, Hubbard Brook REU talks
The document summarizes a study on the effect of nitrogen on mycorrhizal colonization of Populus grandidentata roots. Methods included collecting roots from nitrogen treatment and control plots, quantifying ecto- and arbuscular mycorrhizal colonization under a microscope. Preliminary results found that nitrogen decreases mycorrhizal colonization, with control trees showing more activity than treatment trees. The student will continue this work for their senior thesis and try different staining techniques to further examine the impact of nitrogen on mycorrhizal associations.
CarboScen: Analysis of carbon outcomes in landscape scenarios
Presented by Markku Kanninen and Markku Larjavaara, from the Center for International Forestry Research (CIFOR), at Practical Training in CarboScen in Jakarta, Indonesia, on September 28, 2017.
Estimating Carbon Stock of a Protected Tropical Forest in Cebu, Central Phili...
1) The study estimated the carbon stock of a protected tropical forest in Cebu, Philippines across three carbon pools: vegetation, soil, and litterfall.
2) A total of 20 plots were sampled across homogeneous and heterogeneous areas of the forest, which is dominated by Mahogany and Teak trees.
3) Results found an average of 653.9 tons of carbon stored per hectare in the forest's biomass. The homogeneous areas stored more carbon than heterogeneous areas.
4) Soil organic carbon and litterfall carbon were also quantified monthly from April to August 2010.
5) In total, the forest stores a significant amount of carbon across its three pools, helping to offset fossil fuel emissions
Impacts Of Tree Species And Harvest Regimes on N Retention In Northeastern U....
Impacts Of Tree Species And Harvest Regimes on N Retention In Northeastern U....National Institute of Food and Agriculture
This document describes a new model called Spe-CN that simulates carbon and nitrogen cycling in northeastern U.S. forests. The model is parameterized for individual tree species and allows the user to input scenarios about species composition changes and harvest regimes over time. Model runs show that stands dominated by different tree species vary significantly in predicted nitrogen leaching and retention. Changes in tree species and harvest strategies also impact nitrogen retention levels, even with constant nitrogen deposition levels. The model can help identify forest management strategies that maintain production, maximize nutrient retention, and minimize losses under changing environmental conditions.Fredrick Wandera CLIFF Workshop
PhD research presentation at the workshop of the Climate Food and Farming Network, Dec. 2-4 at Aarhus University, Foulum. The Climate Food and Farming Network is an initiative of Copenhagen U., Aarhus U., and the CGIAR Research Program on Climate Change, Agriculture and Food Security.
Measuring and monitoring soil carbon stocks from point to continental scale i...
This presentation was presented during the 2 Parallel session on Theme 1, Monitoring, mapping, measuring, reporting and verification (MRV) of SOC, of the Global Symposium on Soil Organic Carbon that took place in Rome 21-23 March 2017. The presentation was made by Mr. Jeff Baldock, from CSIRO - Australia, in FAO Hq, Rome
David Montgomery - Soil
The invention of the plow increased soil erosion, which archaeological studies show contributed to the decline of ancient civilizations. Soil erosion causes on-site issues like reduced fertility and off-site issues like water pollution. The estimated annual global cost of soil erosion from water is $33 billion. Conservation agriculture practices like no-till, cover crops, and crop rotations can help reverse soil degradation, increase soil carbon storage, and provide economic and climate benefits. Rattan Lal estimates that conservation agriculture practices could offset 5-15% of global fossil fuel emissions through increased soil carbon sequestration.
HB 2018- Back on a shoestring
This document summarizes research from the Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE) project. The project studies nutrient limitation at 3 forest sites that receive nitrogen, phosphorus, or calcium additions. Key results show that mature forest stands responded significantly to phosphorus additions with increased growth rates, while younger stands responded more to nitrogen. Additionally, adding phosphorus decreased soil nitrogen availability, likely through increased plant or microbial uptake, while nitrogen additions reduced foliar and microbial phosphorus. The interactions between nitrogen and phosphorus limitation are an ongoing area of study.
Soil Carbon Sequestration and Organic Farming
Organic farming has the potential to increase soil carbon levels compared to conventional farming through practices like incorporating fertility-building grass-clover leys and using livestock manures. However, the exact amount of carbon sequestration from organic management remains uncertain due to disparities in assessment methods and farming systems. While organic management often results in higher or slower declining soil carbon levels, the differences compared to conventional are only statistically significant in a few studies. More research is still needed to better define organic and conventional systems and determine their contributions to soil carbon stocks and flows.
Quantifying terrestrial ecosystem carbon stocks for future GHG mitigation, su...
This presentation was presented during the 2 Parallel session on Theme 3.1, Managing SOC in: Soils with high SOC – peatlands, permafrost, and black soils, of the Global Symposium on Soil Organic Carbon that took place in Rome 21-23 March 2017. The presentation was made by Ms. Michelle Garneau from Université du Québec á Montréal - Canada, in FAO Hq, Rome
Foliar nutrient resorption reflects interactions of N and P availablity
This document summarizes a study that investigated nutrient resorption efficiency in tree species across different forest stands. The study found that:
1) Nitrogen resorption efficiency in senescing leaves was correlated with higher phosphorus concentrations in green leaves, not nitrogen concentrations.
2) Phosphorus resorption efficiency was correlated with higher nitrogen concentrations in green leaves, not phosphorus concentrations.
3) Experimental fertilization showed that green leaf nitrogen was lower with phosphorus addition, while green leaf phosphorus was unaffected by nitrogen addition. This suggests trees were phosphorus-limited or co-limited in control plots.
Practical Benefits of Biochar Amendment to Agricultural Systems: Linking Soil...
Practical Benefits of Biochar Amendment to Agricultural Systems: Linking Soil...National Institute of Food and Agriculture
This document summarizes a study on the effects of biochar amendment on soil microbial communities, greenhouse gas fluxes, and crop yields. Random matrix theory-based network analysis revealed that biochar treatment resulted in a more complex and resilient microbial community network compared to the no biochar treatment. Crop yields tended to increase for the Napier biograss but not for corn. Greenhouse gas flux data and further microbial analyses are still underway. The long term goals are to improve agricultural sustainability through biochar amendment and understand the underlying microbial processes influencing greenhouse gas emissions and carbon sequestration.final biog
- The document discusses environmental controls on temperate woodlands, both past and present, using Burton Bushes woodland in England as a case study.
- Tree species richness is highest near the center of Burton Bushes but declines towards the edges. Ilex aquifolium density is strongly and negatively correlated with distance from the center. Quercus petraea density increases with distance from the center.
- Tree girth and age generally increase with distance from the center but there is significant variation, especially between 50-100 meters from the center.
Integrated Belowground Greenhouse Gas Flux Measurements and Modeling, Howlan...
Integrated Belowground Greenhouse Gas Flux Measurements and Modeling, Howlan...National Institute of Food and Agriculture
Greenhouse Gas Flux measurements and modeling of upland and wetland soils at the Howland Forest AmeriFlux site in central Maine.Whendee Silver - Soil
This document summarizes research on managing grasslands to mitigate climate change through carbon sequestration. It finds that:
1) Grasslands store large amounts of carbon in soils, and practices like applying livestock manure or compost can significantly increase soil carbon storage for decades or more, offsetting greenhouse gas emissions.
2) Managing half of California's grasslands to increase soil carbon by 0.5 metric tons per hectare per year could offset 21 million metric tons of CO2 equivalents annually.
3) Projects demonstrating increased soil carbon through compost and manure in California grasslands show the potential for agriculture and soil management to meaningfully contribute to climate change mitigation.
The ecological cost of doing agricultural business
"The ecological cost of doing agricultural business:
Tradeoffs in the Amazon between agricultural production and ecosystem functioning"
Presented at the University of Minnesota, 2 Oct 2013, as a pre-thesis public seminar and as a portion of my preliminary oral PhD exam.
Hb2013 see resorption
This document summarizes a study that investigated whether soil nitrogen controls phosphorus resorption in a nitrogen and phosphorus co-limited forest system. The study found that phosphorus resorption efficiency was not correlated with soil phosphorus levels for the tree species studied. However, phosphorus resorption efficiency was positively correlated with soil nitrogen levels in 4 out of the 6 tree species, providing evidence that soil nitrogen availability may control phosphorus resorption under co-limitation by nitrogen and phosphorus. The document concludes that more nitrogen may be required to produce enzymes involved in resorbing phosphorus from leaves before abscission.
Shoestring2014 10-light
This document discusses a study examining how seedling allocation and survivorship in sugar maple and American beech are influenced by light, nutrients, and moisture. The study found that seedling biomass was not nutrient limited in the first two years. Sugar maple biomass growth increased with soil moisture. Phosphorus increased relative root allocation in sugar maple. Nitrogen decreased sugar maple survivorship. Survivorship of both species decreased with increasing canopy cover, indicating response to light availability. The conclusions were that beech seedlings are less plastic than sugar maple, survivorship depends on light, and mortality at early life stages may be stochastic under canopy.
More Related Content
What's hot
2021-04-29 - Guna Nachimuthu - Crop rotations in cotton systems
2021-04-29 - Guna Nachimuthu - Crop rotations in cotton systemsRiverina Branch of the Australian Society of Soil Science
A presentation of work on long-term rotations, soil biology, tillage, nutrient availability and compaction in northern cotton farming systems by Dr Guna Nachimuthu, NSW DPI Narrabri, to Soil Science Australia's Riverina branch workshop on "Parna and Cotton Soils" held at Yanco on 29 April 2021.Hb2015 phelps
This document discusses a study on how nitrogen (N) affects phosphorus (P) resorption and P affects N resorption in plants. Specifically:
1) The study found that P resorption efficiency was highest in plots with higher soil N, while N resorption efficiency was highest in plots with higher soil P.
2) Analysis showed N resorption efficiency correlated with higher green leaf P concentrations, while P resorption efficiency correlated with higher green leaf N concentrations.
3) This provides evidence that resorption of one nutrient is driven by availability of the other nutrient, demonstrating co-limitation between N and P in these forest ecosystems.
Hb2013 zahor transpiration
This study examines the impact of calcium addition on tree transpiration and root function in New England forests impacted by acid rain. Sapflux measurements showed higher transpiration rates in trees on plots with added calcium silicate compared to control plots, with the strongest response in American beech. Preliminary root analysis found higher live fine root tissue and lower embolism in yellow birch roots from the calcium treatment plot compared to the control in early spring. The study is ongoing across three sites on the White Mountain National Forest to further understand the mechanisms by which calcium impacts forest water use and health.
Hb2015 frewert and pannafino-mychorrhizae
HUBBARD BROOK ECOSYSTEM STUDY, 52nd ANNUAL COOPERATORS' MEETING, Woodstock NH, Wednesday, 8 JULY 2015. Session l: Multiple Element Limitation Study Moderator: Ruth Yanai. Mychorrhizal preference change in aspen: AM vs. EM and N vs. P
Austin Frewert and Jalina Pannafino, SUNY ESF
This study evaluates Ectomycorrhizal colonization in the different treatment plots by counting the number of EM root tips to determine if EM colonization is less pronounced with fertilization. Both Ectomycorrhizae and Arbuscular Mycorrhizae are evaluated on the root tips of Aspen in treatment plots where it is present.
Mycorrhizal presentation, Megan McLin, Hubbard Brook REU talks
The document summarizes a study on the effect of nitrogen on mycorrhizal colonization of Populus grandidentata roots. Methods included collecting roots from nitrogen treatment and control plots, quantifying ecto- and arbuscular mycorrhizal colonization under a microscope. Preliminary results found that nitrogen decreases mycorrhizal colonization, with control trees showing more activity than treatment trees. The student will continue this work for their senior thesis and try different staining techniques to further examine the impact of nitrogen on mycorrhizal associations.
CarboScen: Analysis of carbon outcomes in landscape scenarios
Presented by Markku Kanninen and Markku Larjavaara, from the Center for International Forestry Research (CIFOR), at Practical Training in CarboScen in Jakarta, Indonesia, on September 28, 2017.
Estimating Carbon Stock of a Protected Tropical Forest in Cebu, Central Phili...
1) The study estimated the carbon stock of a protected tropical forest in Cebu, Philippines across three carbon pools: vegetation, soil, and litterfall.
2) A total of 20 plots were sampled across homogeneous and heterogeneous areas of the forest, which is dominated by Mahogany and Teak trees.
3) Results found an average of 653.9 tons of carbon stored per hectare in the forest's biomass. The homogeneous areas stored more carbon than heterogeneous areas.
4) Soil organic carbon and litterfall carbon were also quantified monthly from April to August 2010.
5) In total, the forest stores a significant amount of carbon across its three pools, helping to offset fossil fuel emissions
Impacts Of Tree Species And Harvest Regimes on N Retention In Northeastern U....
Impacts Of Tree Species And Harvest Regimes on N Retention In Northeastern U....National Institute of Food and Agriculture
This document describes a new model called Spe-CN that simulates carbon and nitrogen cycling in northeastern U.S. forests. The model is parameterized for individual tree species and allows the user to input scenarios about species composition changes and harvest regimes over time. Model runs show that stands dominated by different tree species vary significantly in predicted nitrogen leaching and retention. Changes in tree species and harvest strategies also impact nitrogen retention levels, even with constant nitrogen deposition levels. The model can help identify forest management strategies that maintain production, maximize nutrient retention, and minimize losses under changing environmental conditions.Fredrick Wandera CLIFF Workshop
PhD research presentation at the workshop of the Climate Food and Farming Network, Dec. 2-4 at Aarhus University, Foulum. The Climate Food and Farming Network is an initiative of Copenhagen U., Aarhus U., and the CGIAR Research Program on Climate Change, Agriculture and Food Security.
Measuring and monitoring soil carbon stocks from point to continental scale i...
This presentation was presented during the 2 Parallel session on Theme 1, Monitoring, mapping, measuring, reporting and verification (MRV) of SOC, of the Global Symposium on Soil Organic Carbon that took place in Rome 21-23 March 2017. The presentation was made by Mr. Jeff Baldock, from CSIRO - Australia, in FAO Hq, Rome
David Montgomery - Soil
The invention of the plow increased soil erosion, which archaeological studies show contributed to the decline of ancient civilizations. Soil erosion causes on-site issues like reduced fertility and off-site issues like water pollution. The estimated annual global cost of soil erosion from water is $33 billion. Conservation agriculture practices like no-till, cover crops, and crop rotations can help reverse soil degradation, increase soil carbon storage, and provide economic and climate benefits. Rattan Lal estimates that conservation agriculture practices could offset 5-15% of global fossil fuel emissions through increased soil carbon sequestration.
HB 2018- Back on a shoestring
This document summarizes research from the Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE) project. The project studies nutrient limitation at 3 forest sites that receive nitrogen, phosphorus, or calcium additions. Key results show that mature forest stands responded significantly to phosphorus additions with increased growth rates, while younger stands responded more to nitrogen. Additionally, adding phosphorus decreased soil nitrogen availability, likely through increased plant or microbial uptake, while nitrogen additions reduced foliar and microbial phosphorus. The interactions between nitrogen and phosphorus limitation are an ongoing area of study.
Soil Carbon Sequestration and Organic Farming
Organic farming has the potential to increase soil carbon levels compared to conventional farming through practices like incorporating fertility-building grass-clover leys and using livestock manures. However, the exact amount of carbon sequestration from organic management remains uncertain due to disparities in assessment methods and farming systems. While organic management often results in higher or slower declining soil carbon levels, the differences compared to conventional are only statistically significant in a few studies. More research is still needed to better define organic and conventional systems and determine their contributions to soil carbon stocks and flows.
Quantifying terrestrial ecosystem carbon stocks for future GHG mitigation, su...
This presentation was presented during the 2 Parallel session on Theme 3.1, Managing SOC in: Soils with high SOC – peatlands, permafrost, and black soils, of the Global Symposium on Soil Organic Carbon that took place in Rome 21-23 March 2017. The presentation was made by Ms. Michelle Garneau from Université du Québec á Montréal - Canada, in FAO Hq, Rome
Foliar nutrient resorption reflects interactions of N and P availablity
This document summarizes a study that investigated nutrient resorption efficiency in tree species across different forest stands. The study found that:
1) Nitrogen resorption efficiency in senescing leaves was correlated with higher phosphorus concentrations in green leaves, not nitrogen concentrations.
2) Phosphorus resorption efficiency was correlated with higher nitrogen concentrations in green leaves, not phosphorus concentrations.
3) Experimental fertilization showed that green leaf nitrogen was lower with phosphorus addition, while green leaf phosphorus was unaffected by nitrogen addition. This suggests trees were phosphorus-limited or co-limited in control plots.
Practical Benefits of Biochar Amendment to Agricultural Systems: Linking Soil...
Practical Benefits of Biochar Amendment to Agricultural Systems: Linking Soil...National Institute of Food and Agriculture
This document summarizes a study on the effects of biochar amendment on soil microbial communities, greenhouse gas fluxes, and crop yields. Random matrix theory-based network analysis revealed that biochar treatment resulted in a more complex and resilient microbial community network compared to the no biochar treatment. Crop yields tended to increase for the Napier biograss but not for corn. Greenhouse gas flux data and further microbial analyses are still underway. The long term goals are to improve agricultural sustainability through biochar amendment and understand the underlying microbial processes influencing greenhouse gas emissions and carbon sequestration.final biog
- The document discusses environmental controls on temperate woodlands, both past and present, using Burton Bushes woodland in England as a case study.
- Tree species richness is highest near the center of Burton Bushes but declines towards the edges. Ilex aquifolium density is strongly and negatively correlated with distance from the center. Quercus petraea density increases with distance from the center.
- Tree girth and age generally increase with distance from the center but there is significant variation, especially between 50-100 meters from the center.
Integrated Belowground Greenhouse Gas Flux Measurements and Modeling, Howlan...
Integrated Belowground Greenhouse Gas Flux Measurements and Modeling, Howlan...National Institute of Food and Agriculture
Greenhouse Gas Flux measurements and modeling of upland and wetland soils at the Howland Forest AmeriFlux site in central Maine.Whendee Silver - Soil
This document summarizes research on managing grasslands to mitigate climate change through carbon sequestration. It finds that:
1) Grasslands store large amounts of carbon in soils, and practices like applying livestock manure or compost can significantly increase soil carbon storage for decades or more, offsetting greenhouse gas emissions.
2) Managing half of California's grasslands to increase soil carbon by 0.5 metric tons per hectare per year could offset 21 million metric tons of CO2 equivalents annually.
3) Projects demonstrating increased soil carbon through compost and manure in California grasslands show the potential for agriculture and soil management to meaningfully contribute to climate change mitigation.
The ecological cost of doing agricultural business
"The ecological cost of doing agricultural business:
Tradeoffs in the Amazon between agricultural production and ecosystem functioning"
Presented at the University of Minnesota, 2 Oct 2013, as a pre-thesis public seminar and as a portion of my preliminary oral PhD exam.
What's hot (20)
2021-04-29 - Guna Nachimuthu - Crop rotations in cotton systems
2021-04-29 - Guna Nachimuthu - Crop rotations in cotton systems
Mycorrhizal presentation, Megan McLin, Hubbard Brook REU talks
Mycorrhizal presentation, Megan McLin, Hubbard Brook REU talks
CarboScen: Analysis of carbon outcomes in landscape scenarios
CarboScen: Analysis of carbon outcomes in landscape scenarios
Estimating Carbon Stock of a Protected Tropical Forest in Cebu, Central Phili...
Estimating Carbon Stock of a Protected Tropical Forest in Cebu, Central Phili...
Impacts Of Tree Species And Harvest Regimes on N Retention In Northeastern U....
Impacts Of Tree Species And Harvest Regimes on N Retention In Northeastern U....
Measuring and monitoring soil carbon stocks from point to continental scale i...
Measuring and monitoring soil carbon stocks from point to continental scale i...
Quantifying terrestrial ecosystem carbon stocks for future GHG mitigation, su...
Quantifying terrestrial ecosystem carbon stocks for future GHG mitigation, su...
Foliar nutrient resorption reflects interactions of N and P availablity
Foliar nutrient resorption reflects interactions of N and P availablity
Practical Benefits of Biochar Amendment to Agricultural Systems: Linking Soil...
Practical Benefits of Biochar Amendment to Agricultural Systems: Linking Soil...
Integrated Belowground Greenhouse Gas Flux Measurements and Modeling, Howlan...
Integrated Belowground Greenhouse Gas Flux Measurements and Modeling, Howlan...
The ecological cost of doing agricultural business
The ecological cost of doing agricultural business
Viewers also liked
Hb2013 see resorption
This document summarizes a study that investigated whether soil nitrogen controls phosphorus resorption in a nitrogen and phosphorus co-limited forest system. The study found that phosphorus resorption efficiency was not correlated with soil phosphorus levels for the tree species studied. However, phosphorus resorption efficiency was positively correlated with soil nitrogen levels in 4 out of the 6 tree species, providing evidence that soil nitrogen availability may control phosphorus resorption under co-limitation by nitrogen and phosphorus. The document concludes that more nitrogen may be required to produce enzymes involved in resorbing phosphorus from leaves before abscission.
Shoestring2014 10-light
This document discusses a study examining how seedling allocation and survivorship in sugar maple and American beech are influenced by light, nutrients, and moisture. The study found that seedling biomass was not nutrient limited in the first two years. Sugar maple biomass growth increased with soil moisture. Phosphorus increased relative root allocation in sugar maple. Nitrogen decreased sugar maple survivorship. Survivorship of both species decreased with increasing canopy cover, indicating response to light availability. The conclusions were that beech seedlings are less plastic than sugar maple, survivorship depends on light, and mortality at early life stages may be stochastic under canopy.
Hb2013 kendrick moisture
This document discusses a study investigating the effects of calcium addition on soil moisture levels. The study examines six plots in New Hampshire forests that were fertilized with calcium-silicate and compares them to control plots. The study hypothesizes that soil moisture levels will decrease more in the fertilized plots, especially in older stands with lower nutrient availability and closer to the forest floor. Soil moisture data is being collected using dataloggers placed at various soil depths. Preliminary results from two sites show differing impacts of calcium addition on soil moisture, depending on stand age and nutrient levels. Future work will examine data collection improvements and additional analysis methods.
Hb2013 mac pherson maple response
This study examined the effects of calcium addition on sugar maple growth. Measurements were taken of overstory, understory, and seedling sugar maples at plots with and without calcium addition. The results showed that overstory and understory sugar maples generally grew faster with calcium addition compared to the control plots. Seedling height showed no significant differences between calcium addition and control plots. The calcium addition was found to increase soil pH, and may benefit sugar maples by providing more calcium, an important structural component. Continued monitoring of effects on larger trees and further study of seedling biomass and survival were recommended.
Hb2013 dong foliarchem
The document examines whether stand age or soil nutrients better explain variation in foliar chemistry across tree species. Soil and foliage samples were collected from multiple sites varying in stand age. Results found that for most species, stand age did not affect foliar cation concentrations as much as natural heterogeneity in soil nutrients. Specifically, soil nutrients in the top 10cm of soil best predicted foliar calcium and magnesium concentrations for several species, including pin cherry, American beech, red maple, sugar maple, white birch, and yellow birch. The conclusion is that soil nutrient availability, rather than stand age, is the better predictor of foliar cation levels at these sites. More soil data is needed to further investigate the relationships between soil nutrients and
Sophie harrison sap flow REUcon
This document discusses a study measuring the effect of wollastonite (CaSiO3) addition on tree transpiration. Sap flow was measured in American beech, sugar maple, and yellow birch trees using the Granier method in control and wollastonite plots across three sites: Bartlett Experimental Forest, Hubbard Brook Experimental Forest, and Jeffers Brook. Preliminary results found increased sap flow in the Bartlett and Jeffers Brook wollastonite plots but decreased flow in Hubbard Brook. Statistical analysis will be done to further analyze the effects. The goal is to understand how CaSiO3 impacts forest hydrology and health with regards to acid rain to inform management practices.
Pierre bernier iufro2014
This document discusses uncertainty in forest management planning due to climate change, changing societal expectations, and globalization. It outlines three scales of forest management and sources of uncertainty at each scale. Specifically, it notes that climate change is a major cause of current and future uncertainty since tree growth and disturbances will change in unprecedented ways over decades or centuries. The document advocates for approaches like using multiple scenarios and projections, adaptive management through continuous learning and adjustment, and mainstreaming changes to regulations to help forest managers adapt to increasing uncertainty.
Shoestring2014 4-snails
Looking for Snails in Three MELNHE Stands. Stephanie Suttenberg, REU, SUNY ESF ‘17. Hubbard Brook Annual Cooperator's Meeting, W. Thornton, NH, July 10, 2014. Please see REU/RET conference slideshow for more recent results and interpretations.
Eli inventory REUcon
The document examines whether fertilizing trees leads to faster growth. It describes a study measuring the diameter growth of trees in plots with different nutrient treatments (nitrogen, phosphorus, nitrogen and phosphorus combined). The results found that yellow birch showed a strong growth response to the treatments, while previous findings of increased growth in white birch were no longer significant. Mapping of the mature tree stands was also conducted to understand tree interactions and nutrient limitations in northern forests.
Shoestring2014 8-ca soil moisture
This document summarizes a study that added wollastonite (CaSiO3) to experimental forest plots in New Hampshire to examine the effects on soil moisture and tree productivity. Wollastonite was added to bring calcium levels back to pre-industrial amounts, as acid rain has caused leaching of calcium from soils. Previous studies at Hubbard Brook found short-term increases in transpiration and productivity after wollastonite addition. This study monitored soil moisture in wollastonite and control plots, finding one plot (C6 at 30cm depth) had significantly lower soil moisture in the wollastonite area during the growing season, suggesting higher water use by trees, though other data was inconclusive due to
Yanai iufro subplenary
This document discusses quantifying uncertainty in ecosystem budgets. It provides examples of different types of uncertainty commonly encountered in ecosystem studies, including natural variability, measurement error, and model error. The document also examines specific studies that have quantified uncertainty in components of the nitrogen budget at the Hubbard Brook Experimental Forest, including precipitation inputs, streamflow outputs, forest biomass nitrogen, soil nitrogen pools, and nitrogen accumulation rates. Monte Carlo simulations were used to analyze how uncertainty in inputs propagates to uncertainty in overall budget calculations. The studies aim to improve estimates of uncertainty and identify areas where reducing uncertainty could have the most impact.
Shoestring2014 1-4 years in
Four years in: Finally a treatment response in the MELNHE stands. Adam Wild , Research Assistant, SUNY ESF, and Lisa Carper, Student, A. Crosby Kennett High School. Hubbard Brook Annual Cooperator's Meeting, W. Thornton, NH, July 10, 2014.
Shoestring2014 2-recovery
Recovery from disturbance requires resynchronization of ecosystem nutrient cycles. Edward B. Rastetter, MBL; Ruth Yanai, ESF; R. Quinn Thomas, VA Tech (formerly Cornell); Matt Vadeboncoeur, UNH; Tim Fahey, Cornell; Melany Fisk, UM Ohio; Bonnie Kwiatkowski, MBL; and Steven Hamburg, EDF (formerly Brown). Hubbard Brook Annual Cooperator's Meeting, W. Thornton, NH, July 10, 2014.
Iufro uncertainty mexicov5_cw
- The document discusses Mexico's Monitoring, Reporting and Verification (MRV) system for estimating carbon stock changes in forests.
- Mexico's MRV system aims to estimate carbon stock changes and greenhouse gas emissions/removals from the LULUCF sector for national greenhouse gas inventories.
- The National Forest Inventory provides data on carbon stocks and stock changes, while satellite imagery is used to monitor forest area changes.
- Estimates show the forest sector is currently a large carbon sink, absorbing emissions from deforestation and degradation. However, uncertainties in these estimates need to be reduced to support policy decisions.
Hb2013 intro
These slides introduce the MELNHE session at the 2013 annual Hubbard Brook Cooperators Meeting, July 11, 2013. They set up the Shoestring presentations that will follow.
Hb2013 biche decomp
This document describes a study on leaf litter decomposition in the Melnhe stands conducted by a researcher and middle school teacher. The study tested hypotheses about what controls litter mass loss by examining the effects of nutrients, mesh size, and litter mixes from young and mature tree stands. Methods involved placing litter in plots with different nutrient treatments, mesh sizes, and litter mixes. Preliminary results found significant effects of nutrients, mesh size, and their interaction on litter mass loss, with some indication of a phosphorus effect and young stand litter decomposing faster. The researcher and teacher saw the potential for middle school students to do authentic local science.
Hb2013 yang tissuesovertime
This document summarizes a case study examining changes in tree tissue chemistry over time in the Huntington Wildlife Forest. It analyzes nitrogen concentration in branches of American beech, red maple, sugar maple, and yellow birch from 1985 to 2012, finding significant changes. It also discusses how branch nutrients vary by branch diameter and tissue position, citing data showing higher nitrogen and potassium concentrations in smaller diameter, living branches from the upper crown. The study aims to better understand how forest productivity and sustainability are impacted by nitrogen deposition and acidification over time.
Stephanie snail REUcon
The document describes a study that placed cardboard in four forest stands to collect snails and examine the effects of nitrogen, phosphorus, and calcium additions. Cardboard collection occurred four times over the summer. The results showed that only nitrogen and phosphorus additions in one stand (JBO) increased snail numbers compared to the control. Calcium additions increased snail numbers in all stands except one. The study aims to further examine the impacts of soil properties on snail populations.
VerbalCare Enterprise
VerbalCare is an all-in-one patient engagement platform that uses iPads with customizable picture icons at patient bedsides to gather patient needs and interactions. This data is analyzed to provide metrics that improve care quality, efficiency, and other initiatives. Caregivers can access profiles to manage patient requests and monitor nursing activity in real-time through the dashboard. Administrators can also track interactions and metrics around patient engagement, nursing efficiency, and care quality.
Viewers also liked (20)
Similar to Shoestring2014 6-respiration
M Stone- Dissertation Defense
The document summarizes research from a dissertation on microbial contributions to carbon and nutrient cycling across tropical landscapes. It finds that:
1) Soil carbon and nutrients decline rapidly with depth, while microbial biomass and activity also decline but metabolic activity per unit biomass remains similar or increases in deeper soils.
2) Soil organic matter chemistry differs between forest types near the surface but not with soil type, and alkyl carbon may be important for long-term tropical carbon storage.
3) Specific phosphatase enzyme activity is higher in deeper soils, suggesting microbes invest more in phosphorus acquisition under resource-limited conditions.
Medina_ESA2015_posterv2_jml_kjn
Long-term litter manipulation treatments in a temperate forest showed that:
1) Plots with added litter (REF, DL, DLF) had significantly higher soil CO2 efflux rates compared to the control, indicating litter additions increased decomposition.
2) The δ13C values of soil CO2 in litter addition plots were more depleted compared to the control, suggesting litter carbon contributed more to respiration.
3) Neither temperature nor respiration rates explained the δ13C values, implying the isotope signatures of soil organic matter pools did not change with decomposition rates across treatments.
Peatland Diversity and Carbon Dynamics (September 2010)
This document summarizes research on peatland diversity and carbon dynamics. Peatlands store a large amount of the global soil carbon but are threatened by climate change. The research aims to understand relationships between plant diversity, microbial communities, and greenhouse gas emissions across different peatland landforms. Preliminary results show differences in vegetation composition, peat depths, carbon stocks, and microbial communities between open moorland, eroded areas, and gullies. Monthly greenhouse gas flux measurements are ongoing to compare landforms and depths. Relationships found will help predict ecosystem-scale carbon cycling and emissions from biodiversity data.
Peatland Diversity and Carbon Dynamics
The winning talk at the Macaulay Land Use Research Institute's annual Student Seminar Day, given by Mike Whitfield as part of his PhD research.
Biochar for sustainable land management and climate change mitigation
This presentation was presented during the 3 Parallel session on Theme 2, Maintaining and/or increasing SOC stocks for climate change mitigation and adaptation and Land Degradation Neutrality, of the Global Symposium on Soil Organic Carbon that took place in Rome 21-23 March 2017. The presentation was made by Ms. Annette Cowie, from UNCCD – SPI - Australia, in FAO Hq, Rome
Monitored Natural Attenuation
The document discusses using ammonium nitrate injections to enhance monitored natural attenuation (MNA) at a site with dissolved petroleum contamination. Baseline testing found the aquifer had a microbial population but limited nutrients and terminal electron acceptors. Approximately 116 pounds of ammonium nitrate fertilizer was injected, providing a source of nitrate to drive biodegradation. Monitoring after injection found increased biological activity and degradation rates, showing nitrate addition can accelerate MNA by stimulating microbial growth where nutrients were previously limited.
Effects of a raised water table on greenhouse gas emissions and celery yield ...
This presentation was presented during the 2 Parallel session on Theme 3.1, Managing SOC in: Soils with high SOC – peatlands, permafrost, and black soils, of the Global Symposium on Soil Organic Carbon that took place in Rome 21-23 March 2017. The presentation was made by Ms. Magdalena J. Matysek, from University of Sheffield - UK, in FAO Hq, Rome
Impact of carbon sequestration on soil and crop productivity
This document discusses the impact of carbon sequestration on soil and crop productivity. It provides background on global carbon emissions and pools. Soil acts as both a source and sink of atmospheric carbon through processes like photosynthesis, respiration, and decomposition. Improving soil organic carbon through practices like conservation tillage, cover crops, nutrient management, and agroforestry can increase crop yields by improving soil quality properties. Maintaining or increasing soil organic carbon levels through appropriate land management practices helps mitigate climate change while enhancing soil health and agricultural productivity.
SSFSaltMarshWriteUp
This study examines whether salt marshes are at risk of becoming carbon sources rather than carbon sinks due to increased nitrogen loading from pollution. The researchers hypothesize that chronic nitrogen fertilization will 1) increase the quality of plant litter, making it more decomposable, and 2) increase decay rates due to greater nutrient availability for microbes. They test these hypotheses by analyzing soil quality and microbial activity in fertilized and unfertilized salt marsh plots using infrared spectroscopy and a bioavailability assay to measure carbon dioxide emissions from decomposition. Preliminary results suggest fertilization has increased litter decomposition and altered the belowground carbon cycle.
Carbon dynamics_Switchgrass
This study assessed the impacts of biochar, mineral nitrogen fertilizer, and biofertilizers on switchgrass yield, carbon sequestration, soil carbon dioxide concentration, and carbon dioxide emissions over two growing seasons in a sandy loam soil. Biochar increased switchgrass yield by about 10% in the first year and root biomass by up to 50% after two years. Mineral nitrogen fertilization also increased yield and plant carbon sequestration. Biochar increased soil carbon dioxide concentration by up to 50% but its impact on carbon dioxide emissions from the soil varied over time. The highest carbon sequestration budget was obtained with a combination of biochar and mineral nitrogen fertilization. About one-third of
soil carbon.pptx
This document discusses soil carbon dynamics in Indian soils. It notes that soil organic carbon levels are generally low in Indian soils due to high temperatures and soil degradation. It discusses different soil orders and carbon stocks in India. Maintaining soil carbon involves balanced fertilizer use and soil management practices. The Kyoto Protocol aims to reduce greenhouse gas emissions including from agricultural soils. The document also discusses factors influencing carbon mineralization and sequestration in rice soils and effects of bio-fertilizers. Experiments show that elevated carbon dioxide levels can increase soil microbial biomass and enzyme activity. The document concludes with discussing effects of cropping sequences and long-term fertilizer experiments on soil organic carbon forms and levels.
Soil Organic Carbon – devising a single proxy measure for the sustainability ...
This document discusses soil organic carbon (SOC) and ways to increase it in soils. It describes how increasing SOC can improve soil health, plant productivity, and resilience to climate change. Methods discussed to increase SOC include increasing plant inputs through practices like reduced tillage, cover crops, and switching from annual to perennial crops. Maintaining or increasing SOC provides benefits like improved soil structure and nutrient cycling through increased microbial activity. Biogeochemical techniques described can help reveal pathways of carbon transformation and transport in soils. Understanding how climatic factors affect soil processes will be important for achieving sustainable agriculture as the population grows.
Soil Organic Carbon – devising a single proxy measure for the sustainability ...
Speaker: Dr. JENNIFER DUNGAIT - Principal Research Scientist - Rothamsted Research - http://www.rothamsted.ac.uk/
Greenhouse gas trade-offs and N cycling in low-disturbance soils with long te...
Greenhouse gas trade-offs and N cycling in low-disturbance soils with long te...National Institute of Food and Agriculture
Objectives
- Assess types and densities of NA bacteria in diverse manures and manured soils
- Identify physico-chemical conditions that favor NA activity in soil and reduce N2O emissions
- Evaluate the impact of climate adaptive management practices (C addition, low disturbance) on GHG tradeoffs
Tropical forests in a changing world: Investigating global change impacts in ...
The document summarizes a presentation on the impacts of land use change and climate change on tropical forests in Amazonia and Puerto Rico. In Amazonia, the presentation examines how agricultural expansion and intensification impact carbon storage, energy balance, and habitat. It finds that the location of future agricultural expansion will largely determine impacts on ecosystem services. In Puerto Rico, it analyzes the effects of a severe drought on soil biogeochemistry and greenhouse gas emissions, finding complex impacts varying by topography. The presentation concludes that land use change likely has larger biogeochemical effects than agricultural intensification, and climate impacts on tropical forests will involve nutrient cycle feedbacks.
Credit seSoil Health Management Through Carbon Sequestration Under Changing C...
This document discusses strategies for increasing carbon sequestration in soils to help mitigate climate change. It first provides background on climate change and increasing greenhouse gases like carbon dioxide. Agriculture is impacted by climate change through changes in temperature, rainfall, and increased drought. The document then discusses using soils as a carbon sink through agricultural management practices like nutrient management, mulching, conservation tillage, and crop rotations. These practices can increase soil organic carbon levels and the amount of carbon stored in soils.
Nitrogen deposition dose: Response relationships for habitats - Dr Chris Fields
Semi-natural habitats in Britain and, indeed, most highly populated world regions are threatened by aerial deposition of reactive nitrogen compounds, largely emitted from the processes of intensive agriculture, vehicles and power generation. We have been slow to understand the potential significance of the increased exposure and accumulation of nitrogen in the ecological system. Numerous research studies from varied habitats in different countries indicate that the composition and biodiversity of plant communities is adversely affected at even low levels of exposure and impacts may extend beyond the plant kingdom to other trophic levels such as butterflies and birds. Furthermore, the likelihood that negative change in habitats can be easily reversed is now being questioned due to the longevity of accumulated nitrogen in the ecosystem. This paper will discuss the main effects of nitrogen compounds and the nature of the dose response between nitrogen and ecological harm.
Carbon sequestration in cropping system
Soil carbon sequestration involves transferring carbon dioxide from the atmosphere into the soil through crop residues and other organic materials. This helps offset carbon emissions while improving soil quality and productivity. Management practices that increase biomass additions to soils, minimize disturbance, conserve soil and water, and enhance soil structure and biology can sequester carbon through continuous no-till crop production. The document then discusses carbon sequestration in the context of Indian agriculture and the impacts of climate change on food production in India.
Impacts of Nitrogen Deposition on Microbial Community Carbon Dynamics in Fore...
Impacts of Nitrogen Deposition on Microbial Community Carbon Dynamics in Fore...National Institute of Food and Agriculture
Five years of nitrogen and sulfur deposition treatments significantly impacted soil microbial communities and carbon cycling in forest soils. Specifically:
1) Nitrogen and sulfur additions separately and interactively altered the composition of bacterial and fungal communities.
2) Litter decomposition rates increased under nitrogen and sulfur additions.
3) Soil carbon dioxide fluxes were highest under nitrogen additions while methane fluxes were suppressed by sulfur.Similar to Shoestring2014 6-respiration (20)
Peatland Diversity and Carbon Dynamics (September 2010)
Peatland Diversity and Carbon Dynamics (September 2010)
Biochar for sustainable land management and climate change mitigation
Biochar for sustainable land management and climate change mitigation
Effects of a raised water table on greenhouse gas emissions and celery yield ...
Effects of a raised water table on greenhouse gas emissions and celery yield ...
Impact of carbon sequestration on soil and crop productivity
Impact of carbon sequestration on soil and crop productivity
Biochar, Biomass, Soil and Agriculture - Information for public adoption
Biochar, Biomass, Soil and Agriculture - Information for public adoption
Soil Organic Carbon – devising a single proxy measure for the sustainability ...
Soil Organic Carbon – devising a single proxy measure for the sustainability ...
Soil Organic Carbon – devising a single proxy measure for the sustainability ...
Soil Organic Carbon – devising a single proxy measure for the sustainability ...
Greenhouse gas trade-offs and N cycling in low-disturbance soils with long te...
Greenhouse gas trade-offs and N cycling in low-disturbance soils with long te...
Tropical forests in a changing world: Investigating global change impacts in ...
Tropical forests in a changing world: Investigating global change impacts in ...
Credit seSoil Health Management Through Carbon Sequestration Under Changing C...
Credit seSoil Health Management Through Carbon Sequestration Under Changing C...
Nitrogen deposition dose: Response relationships for habitats - Dr Chris Fields
Nitrogen deposition dose: Response relationships for habitats - Dr Chris Fields
Impacts of Nitrogen Deposition on Microbial Community Carbon Dynamics in Fore...
Impacts of Nitrogen Deposition on Microbial Community Carbon Dynamics in Fore...
More from melnhe
Distinguishing N and P addition from the air using imaging spectroscopy. Alex...
This document discusses using imaging spectroscopy and field studies to distinguish between nitrogen (N) and phosphorus (P) additions from the air. It finds that N addition reduced reflectance by producing more chlorophyll and absorbing more light, while P addition increased reflectance. When a model was trained on treatment classes (control, N, P, N+P) for 75% of plots, it predicted the other 25% of plots with 83% accuracy. Field measurements of resin-available N and P in soil aligned with clustering of tree-top spectra responses to nutrients. This indicates trees can act as remote signals of belowground nutrient availability and function.
Germinants: The next generation. Denise Rauschendorfer
The document summarizes multiple studies on germinants conducted by different researchers from 2012 to 2020. It includes population density studies of American beech and sugar maple from 2012, 2018, and 2020 by Denise Rauschendorfer, Shinjini Goswami, and Thomas Mann. It also summarizes seedling survival data collected by Shinjini Goswami, seedling light availability studies, and stem mapping works created by Alex Young using data from previous and present studies. The document is funded by USDA NIFA and NSF, and more information can be found at the provided website.
Mycorrhizal type and co-limitation of forest productivity. Noah Blumenthal
This study investigated how the two types of mycorrhizal associations in northern hardwood forests (arbuscular mycorrhizal and ectomycorrhizal) influence nutrient limitations and forest productivity. The researchers measured annual stem growth in mature forest stands between 2015-2019. They found that nutrient additions of nitrogen and phosphorus had interactive effects on productivity, suggesting co-limitation, and this effect was stronger for arbuscular mycorrhizal tree species than ectomycorrhizal species. They concluded the greater relative abundance of arbuscular mycorrhizal trees promotes nutrient co-limitation in mature northern hardwood forests.
Grow with the changes: Forest succession and woody debris. Joe Nash
1) The document analyzes data from two studies to quantify stocks of downed dead wood in northern hardwood forest stands of different ages.
2) Thirteen forest stands ages 31-145 years old were inventoried for coarse and fine woody debris using line intersect and nested subplot sampling.
3) The primary objective is to distinguish the characteristics of woody debris corresponding to different successional stages in northern hardwood forests.
Litterfall and soil respiration fluxes in the MELNHE study. Thomas Mann
This document summarizes a study examining how soil respiration and litterfall in northern hardwood forests are controlled by nutrient availability. The study measured soil CO2 fluxes and collected fine litterfall from treatment plots with different nitrogen and phosphorus additions across 13 forest stands from 2008-2019. Preliminary results found that nitrogen addition lowered soil respiration in nitrogen-poor sites from 2011-2013. While apparent trends were observed, the authors note that statistical analysis is still needed and fertilization effects on litterfall may be more complicated. Next steps include further statistical analysis and exploring why nutrient additions did not significantly impact soil respiration rates.
N-P co-limitation in young northern hardwood forest. Tim Fahey
1) The document discusses nitrogen, phosphorus, and fine roots in young northern hardwood stands.
2) It presents the hypothesis that growth of new fine roots in these stands may be co-limited by balanced mineral nutrition of nitrogen and phosphorus.
3) A factorial experiment using ingrowth cores found that fine root growth and biomass increased at the plot level in response to the addition of both nitrogen and phosphorus, but not from the addition of only one nutrient.
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
This document discusses an experimental study that examined the effects of nutrient amendments on mycorrhizal colonization and root morphology in red maple seedlings. The study predicted that nitrogen amendments would decrease vesicles in roots, phosphorus amendments would increase coil structures, and root morphology would vary depending on mycorrhizal colonization and structures under each treatment type. It then describes the experimental design, data collection process involving root processing and staining, and analysis of mycorrhizal colonization and root morphology.
Could co-limitation be caused by different nutrients limiting shoots and root...
(1) The MELNHE study examines nutrient co-limitation of forest productivity across 13 forest stands of different ages located in three sites. Fertilization experiments add nitrogen, phosphorus, or both to test for co-limitation.
(2) So far, tree growth has been found to be primarily limited by phosphorus rather than nitrogen or co-limitation.
(3) A new study tested whether root growth is directly limited by nitrogen or phosphorus availability, or responds to aboveground nutrient allocation. Fine root growth responded directly to nitrogen addition but not phosphorus addition, and roots foraged more in phosphorus-rich patches.
Sugar maple leaf characteristics vary with depth in the crown and nutrient ad...
This document summarizes a study that examined how the physical, chemical, and metabolic characteristics of sugar maple leaves vary with their depth in the tree crown and with the addition of nutrients. The study found that foliar nitrogen and chlorophyll increased deeper in the crown and with nitrogen addition, while foliar phosphorus increased with phosphorus addition. The study concludes that most leaves are shaded rather than just "sun" or "shade" leaves, and that examining the vertical gradient in a tree crown can help reveal relationships between leaf characteristics and nutrients.
The timing of senescence affects foliar p resorption dan hong
This document discusses a study on the timing of senescence and its effects on foliar phosphorus (P) resorption. The study (1) examined how foliar concentration and resorption of P and other nutrients varied with N, P, and N+P additions and between species, and (2) investigated whether the timing of senescence affected foliar resorption with nutrient additions. Field collections of green leaves and litter were made over multiple dates in the fall. Results showed adding N increased foliar N but decreased foliar P, while adding P increased foliar P. P resorption efficiency was lower under P additions and proceeded over the course of the fall.
Space wars the fight for light in the stands of bartlett sarah congress
This document discusses using LiDAR to map and quantify forest canopy structure within stands at Bartlett, Hubbard Brook, and Jeffers Brook. The first steps are to create maps of the tree canopy and describe the position of each species. Field data on species heights is collected along transects and recorded. Next steps are to combine LiDAR and field data to create species-specific vegetation area index profiles and determine if treatments have affected species dominance or position in the canopy.
Having a stake in nutrient cycling effects of n and p addition on wood decay...
In a 3-year pilot study, researchers placed sugar maple wood stakes in forest stands to examine the effects of adding nitrogen, phosphorus, both nutrients, and a control on wood decay. Over 273 stakes were distributed across plots with different nutrient additions or a control at 3 sites. The stakes will be collected and analyzed to determine percent mass loss over the study period, with future analysis of nutrients, soil microbes, and their role in wood decay.
Fruiting response of ectomycorrhizal fungi to nutrient additions claudia vi...
Collecting fungal sporocarps allows researchers to survey the effects of nutrient additions on mycorrhizal fungi fitness over a larger area than soil samples alone. The study aims to determine how ectomycorrhizal sporocarp abundance and fungal community composition vary with nitrogen, phosphorus, and combined nutrient additions and between seasons. Over 4,000 sporocarps from 35 genera and 160 morphospecies were collected and will be identified using genetic techniques to analyze impacts of nutrient manipulations.
Does the fate of n depend on p availability in soil - samuel butler
This document discusses using an N15 experiment to determine if the fate of nitrogen (N) in soil depends on the availability of phosphorus (P). Previous research found that adding phosphorus suppresses resin-available nitrogen in soils. Additional studies showed that trees grew more in response to added phosphorus in mid-aged and old growth forests, but responded more to added nitrogen in younger forests. The proposed experiment would use the N15 isotope to trace nitrogen pathways through soil organic matter, plant roots, the microbial biomass, and mineral soil.
Belowground c allocation estimated as soil respiration minus aboveground litt...
This document summarizes a study estimating belowground carbon allocation in forests by measuring soil respiration and aboveground litter inputs over multiple years. The researchers found that nitrogen decreases soil respiration and likely belowground carbon allocation, while phosphorus decreases leaf litter production. Preliminary results suggest phosphorus may matter more for aboveground growth while nitrogen affects belowground processes to a greater degree.
Baby boomers are there any surviving germinants from the recent mast year -...
The document discusses a study examining how nutrient treatments affect germination rates and seedling survival of American beech and sugar maple. The study had three hypotheses: 1) germination and survival of maple would be highest with calcium addition; 2) germination and survival of beech would reflect limitation of nitrogen or phosphorus; and 3) survival may reflect nutritional value of seedlings. Methods involved counting germinants and seedlings in nutrient treatment plots over two years. Results showed beech germination increased with nitrogen and phosphorus addition, while maple decreased. Seedling survival decreased with nitrogen and phosphorus addition but increased with calcium addition, with no difference between nitrogen and phosphorus effects.
And you thought there were no earthworms in our forests
There were few earthworms found at Bartlett but many earthworms were found at Jeffers Brook. Plots at Jeffers Brook with added nitrogen had fewer earthworms, while plots with added calcium had more earthworms.
Intro for asm workshop see
This document provides information about an upcoming workshop on quantifying uncertainty in monitoring. It includes:
- Details on presenters who will discuss topics like taxonomy of uncertainty, examples from NEON, detecting differences from rain gauge and mercury monitoring data, and measuring uncertainty in the Forest Inventory and Analysis.
- An agenda that will include introductions from participants, five minute presentations followed by discussion, and a general discussion on how the workshop helped and what further assistance is needed.
- Information on current practices in reporting uncertainty from ecosystem studies, including a survey that identified major sources of uncertainty and how respondents report, understand, and view the importance of different sources.
Asm2018 7 young
Forest inventory crews were analyzed to determine measurement errors in tree diameter. The study found bias may exist due to penalties for observations more than one class off. While measurement error magnitude was identified, the most uncertain measurements may not be the most important to improve. Propagating the errors into forest inventory data product calculations like timber volume and carbon storage will show which measurements are most important to improve.
Asm2018 6 dietze
The document discusses Pecan Project's uncertainty analysis for LTER ASM 2018. It analyzes parameter uncertainty and sensitivity, and outputs uncertainty through trait meta-analysis, iterative Bayesian calibration, and variance decomposition. Key findings include growth respiration and root water uptake being highly sensitive, and stomatal conductance variability differing between conifer and hardwood species and latitudes. The analysis aims to characterize, propagate, analyze, and reduce uncertainties.
More from melnhe (20)
Distinguishing N and P addition from the air using imaging spectroscopy. Alex...
Distinguishing N and P addition from the air using imaging spectroscopy. Alex...
Germinants: The next generation. Denise Rauschendorfer
Germinants: The next generation. Denise Rauschendorfer
Mycorrhizal type and co-limitation of forest productivity. Noah Blumenthal
Mycorrhizal type and co-limitation of forest productivity. Noah Blumenthal
Grow with the changes: Forest succession and woody debris. Joe Nash
Grow with the changes: Forest succession and woody debris. Joe Nash
Litterfall and soil respiration fluxes in the MELNHE study. Thomas Mann
Litterfall and soil respiration fluxes in the MELNHE study. Thomas Mann
N-P co-limitation in young northern hardwood forest. Tim Fahey
N-P co-limitation in young northern hardwood forest. Tim Fahey
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
Could co-limitation be caused by different nutrients limiting shoots and root...
Could co-limitation be caused by different nutrients limiting shoots and root...
Sugar maple leaf characteristics vary with depth in the crown and nutrient ad...
Sugar maple leaf characteristics vary with depth in the crown and nutrient ad...
The timing of senescence affects foliar p resorption dan hong
The timing of senescence affects foliar p resorption dan hong
Space wars the fight for light in the stands of bartlett sarah congress
Space wars the fight for light in the stands of bartlett sarah congress
Having a stake in nutrient cycling effects of n and p addition on wood decay...
Having a stake in nutrient cycling effects of n and p addition on wood decay...
Fruiting response of ectomycorrhizal fungi to nutrient additions claudia vi...
Fruiting response of ectomycorrhizal fungi to nutrient additions claudia vi...
Does the fate of n depend on p availability in soil - samuel butler
Does the fate of n depend on p availability in soil - samuel butler
Belowground c allocation estimated as soil respiration minus aboveground litt...
Belowground c allocation estimated as soil respiration minus aboveground litt...
Baby boomers are there any surviving germinants from the recent mast year -...
Baby boomers are there any surviving germinants from the recent mast year -...
And you thought there were no earthworms in our forests
And you thought there were no earthworms in our forests
Recently uploaded
在线办理(lboro毕业证书)拉夫堡大学毕业证学历证书一模一样
学校原件一模一样【微信：741003700 】《(lboro毕业证书)拉夫堡大学毕业证学历证书》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Evolving Lifecycles with High Resolution Site Characterization (HRSC) and 3-D...
The incorporation of a 3DCSM and completion of HRSC provided a tool for enhanced, data-driven, decisions to support a change in remediation closure strategies. Currently, an approved pilot study has been obtained to shut-down the remediation systems (ISCO, P&T) and conduct a hydraulic study under non-pumping conditions. A separate micro-biological bench scale treatability study was competed that yielded positive results for an emerging innovative technology. As a result, a field pilot study has commenced with results expected in nine-twelve months. With the results of the hydraulic study, field pilot studies and an updated risk assessment leading site monitoring optimization cost lifecycle savings upwards of $15MM towards an alternatively evolved best available technology remediation closure strategy.
ENVIRONMENT~ Renewable Energy Sources and their future prospects.
This presentation is for us to know that how our Environment need Attention for protection of our natural resources which are depleted day by day that's why we need to take time and shift our attention to renewable energy sources instead of non-renewable sources which are better and Eco-friendly for our environment. these renewable energy sources are so helpful for our planet and for every living organism which depends on environment.
Promoting Multilateral Cooperation for Sustainable Peatland management
Presented by Agus Julianto on GLF Peatlands 2024 - 360 Degree Approach to Improving Capacity of Multiple Stakeholders to Manage Peatland Sustainably
Kinetic studies on malachite green dye adsorption from aqueous solutions by A...
Kinetic studies on malachite green dye adsorption from aqueous solutions by A...Open Access Research Paper
Water polluted by dyestuffs compounds is a global threat to health and the environment; accordingly, we prepared a green novel sorbent chemical and Physical system from an algae, chitosan and chitosan nanoparticle and impregnated with algae with chitosan nanocomposite for the sorption of Malachite green dye from water. The algae with chitosan nanocomposite by a simple method and used as a recyclable and effective adsorbent for the removal of malachite green dye from aqueous solutions. Algae, chitosan, chitosan nanoparticle and algae with chitosan nanocomposite were characterized using different physicochemical methods. The functional groups and chemical compounds found in algae, chitosan, chitosan algae, chitosan nanoparticle, and chitosan nanoparticle with algae were identified using FTIR, SEM, and TGADTA/DTG techniques. The optimal adsorption conditions, different dosages, pH and Temperature the amount of algae with chitosan nanocomposite were determined. At optimized conditions and the batch equilibrium studies more than 99% of the dye was removed. The adsorption process data matched well kinetics showed that the reaction order for dye varied with pseudo-first order and pseudo-second order. Furthermore, the maximum adsorption capacity of the algae with chitosan nanocomposite toward malachite green dye reached as high as 15.5mg/g, respectively. Finally, multiple times reusing of algae with chitosan nanocomposite and removing dye from a real wastewater has made it a promising and attractive option for further practical applications.
Climate Change All over the World .pptx
Climate change refers to significant and lasting changes in the average weather patterns over periods ranging from decades to millions of years. It encompasses both global warming driven by human emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. While climate change is a natural phenomenon, human activities, particularly since the Industrial Revolution, have accelerated its pace and intensity
Peatlands of Latin America and the Caribbean
Presented by The Global Peatlands Assessment: Mapping, Policy, and Action at GLF Peatlands 2024 - The Global Peatlands Assessment: Mapping, Policy, and Action
Peatland Management in Indonesia, Science to Policy and Knowledge Education
Peatland Management in Indonesia, Science to Policy and Knowledge EducationGlobal Landscapes Forum (GLF)
Presented by Feri Johana at GLF Peatlands 2024 - 360 Degree Approach to Improving Capacity of Multiple Stakeholders to Manage Peatland SustainablyRecycling and Disposal on SWM Raymond Einyu pptx
Increasing urbanization, rural–urban migration, rising standards of living, and rapid development associated with population growth have resulted in increased solid waste generation by industrial, domestic and other activities in Nairobi City. It has been noted in other contexts too that increasing population, changing consumption patterns, economic development, changing income, urbanization and industrialization all contribute to the increased generation of waste.
With the increasing urban population in Kenya, which is estimated to be growing at a rate higher than that of the country’s general population, waste generation and management is already a major challenge. The industrialization and urbanization process in the country, dominated by one major city – Nairobi, which has around four times the population of the next largest urban centre (Mombasa) – has witnessed an exponential increase in the generation of solid waste. It is projected that by 2030, about 50 per cent of the Kenyan population will be urban.
Aim:
A healthy, safe, secure and sustainable solid waste management system fit for a world – class city.
Improve and protect the public health of Nairobi residents and visitors.
Ecological health, diversity and productivity and maximize resource recovery through the participatory approach.
Goals:
Build awareness and capacity for source separation as essential components of sustainable waste management.
Build new environmentally sound infrastructure and systems for safe disposal of residual waste and replacing current dumpsites which should be commissioned.
Current solid waste management situation:
The status.
Solid waste generation rate is at 2240 tones / day
collection efficiently is at about 50%.
Actors i.e. city authorities, CBO’s , private firms and self-disposal
Current SWM Situation in Nairobi City:
Solid waste generation – collection – dumping
Good Practices:
• Separation – recycling – marketing.
• Open dumpsite dandora dump site through public education on source separation of waste, of which the situation can be reversed.
• Nairobi is one of the C40 cities in this respect , various actors in the solid waste management space have adopted a variety of technologies to reduce short lived climate pollutants including source separation , recycling , marketing of the recycled products.
• Through the network, it should expect to benefit from expertise of the different actors in the network in terms of applicable technologies and practices in reducing the short-lived climate pollutants.
Good practices:
Despite the dismal collection of solid waste in Nairobi city, there are practices and activities of informal actors (CBOs, CBO-SACCOs and yard shop operators) and other formal industrial actors on solid waste collection, recycling and waste reduction.
Practices and activities of these actor groups are viewed as innovations with the potential to change the way solid waste is handled.
CHALLENGES:
• Resource Allocation.
Epcon is One of the World's leading Manufacturing Companies.
Epcon is One of the World's leading Manufacturing Companies. With over 4000 installations worldwide, EPCON has been pioneering new techniques since 1977 that have become industry standards now. Founded in 1977, Epcon has grown from a one-man operation to a global leader in developing and manufacturing innovative air pollution control technology and industrial heating equipment.
Global Peatlands Map and Hotspot Explanation Atlas
Presented by Alexandra Barthelmes at GLF Peatlands 2024 - The Global Peatlands Assessment: Mapping, Policy, and Action
Improving the Management of Peatlands and the Capacities of Stakeholders in I...
Improving the Management of Peatlands and the Capacities of Stakeholders in I...Global Landscapes Forum (GLF)
Presented by Sonya Dewi at GLF Peatlands 2024 - 360 Degree Approach to Improving Capacity of Multiple Stakeholders to Manage Peatland SustainablyOptimizing Post Remediation Groundwater Performance with Enhanced Microbiolog...
Results of geophysics and pneumatic injection pilot tests during 2003 – 2007 yielded significant positive results for injection delivery design and contaminant mass treatment, resulting in permanent shut-down of an existing groundwater Pump & Treat system.
Accessible source areas were subsequently removed (2011) by soil excavation and treated with the placement of Emulsified Vegetable Oil EVO and zero-valent iron ZVI to accelerate treatment of impacted groundwater in overburden and weathered fractured bedrock. Post pilot test and post remediation groundwater monitoring has included analyses of CVOCs, organic fatty acids, dissolved gases and QuantArray® -Chlor to quantify key microorganisms (e.g., Dehalococcoides, Dehalobacter, etc.) and functional genes (e.g., vinyl chloride reductase, methane monooxygenase, etc.) to assess potential for reductive dechlorination and aerobic cometabolism of CVOCs.
In 2022, the first commercial application of MetaArray™ was performed at the site. MetaArray™ utilizes statistical analysis, such as principal component analysis and multivariate analysis to provide evidence that reductive dechlorination is active or even that it is slowing. This creates actionable data allowing users to save money by making important site management decisions earlier.
The results of the MetaArray™ analysis’ support vector machine (SVM) identified groundwater monitoring wells with a 80% confidence that were characterized as either Limited for Reductive Decholorination or had a High Reductive Reduction Dechlorination potential. The results of MetaArray™ will be used to further optimize the site’s post remediation monitoring program for monitored natural attenuation.
Microbial characterisation and identification, and potability of River Kuywa ...
Microbial characterisation and identification, and potability of River Kuywa ...Open Access Research Paper
Water contamination is one of the major causes of water borne diseases worldwide. In Kenya, approximately 43% of people lack access to potable water due to human contamination. River Kuywa water is currently experiencing contamination due to human activities. Its water is widely used for domestic, agricultural, industrial and recreational purposes. This study aimed at characterizing bacteria and fungi in river Kuywa water. Water samples were randomly collected from four sites of the river: site A (Matisi), site B (Ngwelo), site C (Nzoia water pump) and site D (Chalicha), during the dry season (January-March 2018) and wet season (April-July 2018) and were transported to Maseno University Microbiology and plant pathology laboratory for analysis. The characterization and identification of bacteria and fungi were carried out using standard microbiological techniques. Nine bacterial genera and three fungi were identified from Kuywa river water. Clostridium spp., Staphylococcus spp., Enterobacter spp., Streptococcus spp., E. coli, Klebsiella spp., Shigella spp., Proteus spp. and Salmonella spp. Fungi were Fusarium oxysporum, Aspergillus flavus complex and Penicillium species. Wet season recorded highest bacterial and fungal counts (6.61-7.66 and 3.83-6.75cfu/ml) respectively. The results indicated that the river Kuywa water is polluted and therefore unsafe for human consumption before treatment. It is therefore recommended that the communities to ensure that they boil water especially for drinking.
Improving the viability of probiotics by encapsulation methods for developmen...
Improving the viability of probiotics by encapsulation methods for developmen...Open Access Research Paper
The popularity of functional foods among scientists and common people has been increasing day by day. Awareness and modernization make the consumer think better regarding food and nutrition. Now a day’s individual knows very well about the relation between food consumption and disease prevalence. Humans have a diversity of microbes in the gut that together form the gut microflora. Probiotics are the health-promoting live microbial cells improve host health through gut and brain connection and fighting against harmful bacteria. Bifidobacterium and Lactobacillus are the two bacterial genera which are considered to be probiotic. These good bacteria are facing challenges of viability. There are so many factors such as sensitivity to heat, pH, acidity, osmotic effect, mechanical shear, chemical components, freezing and storage time as well which affects the viability of probiotics in the dairy food matrix as well as in the gut. Multiple efforts have been done in the past and ongoing in present for these beneficial microbial population stability until their destination in the gut. One of a useful technique known as microencapsulation makes the probiotic effective in the diversified conditions and maintain these microbe’s community to the optimum level for achieving targeted benefits. Dairy products are found to be an ideal vehicle for probiotic incorporation. It has been seen that the encapsulated microbial cells show higher viability than the free cells in different processing and storage conditions as well as against bile salts in the gut. They make the food functional when incorporated, without affecting the product sensory characteristics.
Overview of the Global Peatlands Assessment
Presented by Patrick Scheel at GLF Peatlands 2024 - The Global Peatlands Assessment: Mapping, Policy, and Action
Enhanced action and stakeholder engagement for sustainable peatland management
Enhanced action and stakeholder engagement for sustainable peatland managementGlobal Landscapes Forum (GLF)
Presented by Jan Peters at GLF Peatlands 2024 - The Global Peatlands Assessment: Mapping, Policy, and Action原版制作(Newcastle毕业证书)纽卡斯尔大学毕业证在读证明一模一样
学校原件一模一样【微信：741003700 】《(Newcastle毕业证书)纽卡斯尔大学毕业证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Recently uploaded (20)
Evolving Lifecycles with High Resolution Site Characterization (HRSC) and 3-D...
Evolving Lifecycles with High Resolution Site Characterization (HRSC) and 3-D...
ENVIRONMENT~ Renewable Energy Sources and their future prospects.
ENVIRONMENT~ Renewable Energy Sources and their future prospects.
Promoting Multilateral Cooperation for Sustainable Peatland management
Promoting Multilateral Cooperation for Sustainable Peatland management
world-environment-day-2024-240601103559-14f4c0b4.pptx
world-environment-day-2024-240601103559-14f4c0b4.pptx
Kinetic studies on malachite green dye adsorption from aqueous solutions by A...
Kinetic studies on malachite green dye adsorption from aqueous solutions by A...
Peatland Management in Indonesia, Science to Policy and Knowledge Education
Peatland Management in Indonesia, Science to Policy and Knowledge Education
Epcon is One of the World's leading Manufacturing Companies.
Epcon is One of the World's leading Manufacturing Companies.
Global Peatlands Map and Hotspot Explanation Atlas
Global Peatlands Map and Hotspot Explanation Atlas
Improving the Management of Peatlands and the Capacities of Stakeholders in I...
Improving the Management of Peatlands and the Capacities of Stakeholders in I...
Optimizing Post Remediation Groundwater Performance with Enhanced Microbiolog...
Optimizing Post Remediation Groundwater Performance with Enhanced Microbiolog...
Microbial characterisation and identification, and potability of River Kuywa ...
Microbial characterisation and identification, and potability of River Kuywa ...
Improving the viability of probiotics by encapsulation methods for developmen...
Improving the viability of probiotics by encapsulation methods for developmen...
Enhanced action and stakeholder engagement for sustainable peatland management
Enhanced action and stakeholder engagement for sustainable peatland management
Shoestring2014 6-respiration
- 1. Soil Respiration Responds to Nutrient Addition in Northern Hardwood Forests Tim Fahey, Cornell University
- 3. Components of Soil Respiration • Heterotrophic respiration by microbial decomposers • Root-associated respiration (supplied by belowground C allocation) - respiration of fine roots - respiration of mycorrhizal fungi - respiration of other rhizosphere microbes
- 4. Seasonal Pattern of Soil Respiration in Hubbard Brook Sites
- 5. Pre-treatment Pattern of Soil Respiration Both soil respiration and estimated belowground carbon allocation declined significantly with increasing soil nutrient availability across the MELNHE sites
- 6. -3 0 3 6 9 400 500 600 700 800 Oe 0 2 4 6 8 BelowgroundCallocation(gCm -2 yr -1 ) 400 500 600 700 800 Oa net nitrification (ug g-1 ) 0.2 0.3 0.4 0.5 0.6 0.7 0.8 400 500 600 700 800 0-10 cm 2000 3000 4000 5000 6000 7000 Oe 400 800 1200 1600 2000 Oa exchangable Ca (ug g-1 ) 0 100 200 300 400 500 0-10 cm R2=0.96 R2=0.80 R2=0.90 R2=0.73 R2=0.94 Pre-treatment observations for a sub-set of the sites
- 7. Hypotheses 1. Addition of a tree growth-limiting nutrient will reduce belowground carbon allocation resulting in lower root-associated respiration 1a. Colimitation would be indicated by strong response of soil respiration to addition of N + P 2. Reduction of soil respiration will be greatest in most infertile sites 3. Nitrogen addition might suppress activity of microbial decomposers thereby complicating interpretation of respiration response
- 8. Response ratio of soil respiration to nutrient additions We express the treatment effect on soil respiration as the ratio: % response ratio= ((fertilized – control)/control) * 100 Thus a negative response ratio indicates a reduction of soil respiration in the treated plots
- 10. N + P Plots
- 11. Note: no clear evidence of a decline of heterotrophic respiration in response to nutrient addition (next talk)
- 12. Conclusions • Response of soil respiration to nutrient addition varies linearly with pre-treatment site fertility • Belowground carbon allocation in infertile sites decreases significantly in response to nutrient additions (resulting in tree aboveground growth increase?) • Some indication of possible co-limitation by N and P on infertile sites
- 13. Acknowledgements Kikang, Hongzhang, Melany, Ruth and a cast of thousands
- 14. What limits microbial respiration? Oie CO2 incorportation into Oa Litter and root inputs
- 15. Questions: • Do N or P limit microbial respiration in forest floor? • Is this limitation secondary to that of C? • Does forest age or site affect respiratory responses? 3 sites: • Jeffers Brook • HBEF • BEF
- 16. Approach: • Lab incubations • Treatments: Control C (litter) nutrient (N or P) C + nutrient
- 18. • N suppressed respiration • With added C, P increased respiration
- 19. N effect microbial biomass accumulation: 256 (101) DON accumulation: 440 (969) Litter effect inorganic N reduced by 82 (23) ug N/g Where the added N (mg/g soil) went: Ni: 137 (27) DON: 115 (14) MBN: 797 (95) Ni: 56 (7) DON: 114 (25) MBN: 877 (77) Ni: 840 (87) DON: 554 (99) MBN: 1082 (93) control + litter +N
- 20. cellulases Hypothesized C, N, P interactions: Low N Microbial biomass synthesis CO2 Respiration
- 21. cellulases Hypothesized C, N, P interactions: High N Microbial biomass synthesis Respiration CO2
- 22. Why would P limitation be induced by added C? Hypothesized C, N, P interactions: N may also limit enzyme production, C availability. We predict that adding N and P together should increase microbial respiration