Week 11 nutrient cycles
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The document discusses nutrient cycles and the key elements that make up living organisms, including carbon, oxygen, hydrogen, nitrogen, phosphorus, and sulfur. It explains how these elements cycle through ecosystems via photosynthesis, respiration, decomposition, and the absorption by plants and consumption by animals. Specific nutrient cycles like the carbon, nitrogen, and water cycles are examined in more detail.
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Decomposers such as bacteria and fungi break down dead organic matter and release nutrients back into the soil. Nitrogen is an essential nutrient that is recycled through a nitrogen cycle. This involves nitrogen fixation by bacteria, assimilation by plants, ammonification through decomposition, nitrification by special bacteria, and denitrification which returns nitrogen to the atmosphere. Maintaining this nitrogen cycle is important for supporting new plant growth in ecosystems.
Nitrogen cycle
The nitrogen cycle describes how nitrogen is converted between its various forms and circulates between the atmosphere, soil, plants, and animals. Bacteria are able to fix nitrogen from the atmosphere into ammonia, which can then be converted to nitrates that plants can absorb. Animals obtain nitrogen by eating plants or other animals, and decomposition returns unused nitrogen to the soil through ammonification and denitrification.
Nitrogen cycle PERIOD 5
The nitrogen cycle describes the movement of nitrogen through the environment. It involves nitrogen fixation by bacteria, ammonification by decomposers, nitrification by soil bacteria, and denitrification by bacteria in waterlogged soils that converts nitrogen back to its gaseous form. Human activities such as fossil fuel combustion, use of nitrogen fertilizers, and livestock ranching have significantly increased the global nitrogen cycle, causing issues like smog, acid rain, eutrophication, and increased greenhouse gas emissions. While some seek solutions, many nations prioritize food production over environmental impacts.
Nitrogen cycle
This is a quick undetailed presentation of the components of the Nitrogen Cycle. The worksheet that goes with it is at this link
Nitrogen cycle
The nitrogen cycle involves the transformation of nitrogen between its various chemical forms and exchanges between the atmosphere, soil, plants, and animals. Nitrogen enters the soil through decomposition, is converted to ammonium then nitrates by microbes, taken up by plant roots, and either remains in plant tissue or enters the food chain when consumed by animals. It can return to the atmosphere through denitrification by soil bacteria or industrial fixation through the Haber process. Anthropogenic activities such as agriculture and fossil fuel combustion have significantly impacted the global nitrogen cycle.
NITROGEN CYCLE AND FIXATION
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Nitrogen cycle
Not yet finished.
Questions asked:
1 What is Nitrogen
2 Why is Nitrogen important
3 What is nitrogen cycle
4 How does the nitrogen cycle work
5 How does human intervention affect the nitrogen cycle
- Credits to the owner of the articles and illustrations, I just created a powerpoint presentation to gather all basic and important details about the Nitrogen cycle
Nitrogen cycle
The document summarizes the nitrogen cycle, which is the process by which nitrogen is converted between various chemical forms through biological and physical processes like fixation, ammonification, nitrification, and denitrification. It discusses how these processes work together in ecosystems and how human activities have significantly impacted the global nitrogen cycle through fossil fuel combustion, fertilizer use, and waste release.
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Decomposers such as bacteria and fungi break down dead organic matter and release nutrients back into the soil. Nitrogen is an essential nutrient that is recycled through a nitrogen cycle. This involves nitrogen fixation by bacteria, assimilation by plants, ammonification through decomposition, nitrification by special bacteria, and denitrification which returns nitrogen to the atmosphere. Maintaining this nitrogen cycle is important for supporting new plant growth in ecosystems.
Nitrogen cycle
The nitrogen cycle describes how nitrogen is converted between its various forms and circulates between the atmosphere, soil, plants, and animals. Bacteria are able to fix nitrogen from the atmosphere into ammonia, which can then be converted to nitrates that plants can absorb. Animals obtain nitrogen by eating plants or other animals, and decomposition returns unused nitrogen to the soil through ammonification and denitrification.
Nitrogen cycle PERIOD 5
The nitrogen cycle describes the movement of nitrogen through the environment. It involves nitrogen fixation by bacteria, ammonification by decomposers, nitrification by soil bacteria, and denitrification by bacteria in waterlogged soils that converts nitrogen back to its gaseous form. Human activities such as fossil fuel combustion, use of nitrogen fertilizers, and livestock ranching have significantly increased the global nitrogen cycle, causing issues like smog, acid rain, eutrophication, and increased greenhouse gas emissions. While some seek solutions, many nations prioritize food production over environmental impacts.
Nitrogen cycle
This is a quick undetailed presentation of the components of the Nitrogen Cycle. The worksheet that goes with it is at this link
Nitrogen cycle
The nitrogen cycle involves the transformation of nitrogen between its various chemical forms and exchanges between the atmosphere, soil, plants, and animals. Nitrogen enters the soil through decomposition, is converted to ammonium then nitrates by microbes, taken up by plant roots, and either remains in plant tissue or enters the food chain when consumed by animals. It can return to the atmosphere through denitrification by soil bacteria or industrial fixation through the Haber process. Anthropogenic activities such as agriculture and fossil fuel combustion have significantly impacted the global nitrogen cycle.
NITROGEN CYCLE AND FIXATION
Science 24-7 is another affiliate of sciencetutors and webscience. Please see more resources at www.sciencetutors.zoomshare.com
Email for all science24-7 correspondence is: sciencetutorshelpdesk@gmail.com
Nitrogen cycle
Not yet finished.
Questions asked:
1 What is Nitrogen
2 Why is Nitrogen important
3 What is nitrogen cycle
4 How does the nitrogen cycle work
5 How does human intervention affect the nitrogen cycle
- Credits to the owner of the articles and illustrations, I just created a powerpoint presentation to gather all basic and important details about the Nitrogen cycle
Nitrogen cycle
The document summarizes the nitrogen cycle, which is the process by which nitrogen is converted between various chemical forms through biological and physical processes like fixation, ammonification, nitrification, and denitrification. It discusses how these processes work together in ecosystems and how human activities have significantly impacted the global nitrogen cycle through fossil fuel combustion, fertilizer use, and waste release.
Nitrogen cycle - Honors only 2.04
The nitrogen cycle describes how nitrogen is converted between its various forms as it circulates in the biosphere and lithosphere. Atmospheric nitrogen is converted to ammonia or nitrates through nitrogen fixation, which occurs via lightning, industrial fixation, or biological fixation by bacteria. Ammonia is converted to nitrites and nitrates through nitrification by nitrifying bacteria. Organic nitrogen from dead organisms is broken down into ammonium through ammonification by bacteria. Nitrates are converted back to atmospheric nitrogen through denitrification, replenishing the nitrogen in the air.
Nitrogen Cycle & How Do Human Activities Affect the Ecosystem by Divine Garcia
Nitrogen is an essential element for life that cycles between the atmosphere, soil, plants, and animals. The nitrogen cycle involves four main processes: nitrogen fixation, ammonification, nitrification, and denitrification. Nitrogen fixation involves converting nitrogen gas from the atmosphere into nitrogen compounds usable by organisms through lightning, industrial fixation, and biological fixation by bacteria. Ammonification and nitrification convert nitrogen wastes and residues into plant-usable inorganic forms through microorganisms in the soil. Denitrification returns nitrogen to the atmosphere, replenishing the atmospheric supply.
Nitrogen cycle
The document summarizes the nitrogen cycle. It describes the key steps in the nitrogen cycle as nitrogen fixation, nitrogen assimilation, ammonification, nitrification, and denitrification. Nitrogen fixation involves converting nitrogen gas from the atmosphere into inorganic nitrogen compounds usable by plants and animals. This is done mainly by nitrogen-fixing bacteria. The nitrogen is then assimilated by plants and animals and enters the ecosystem. As organisms die and decay, ammonification occurs which converts nitrogen into ammonia. Nitrification then transforms ammonia into nitrates which can be used by plants. Finally, denitrification returns nitrates to the atmosphere as nitrogen gas by bacteria. The document also discusses how human activities like fertilizer use and fossil fuel burning
Nitrogen cycle
The document discusses the nitrogen cycle. It describes how nitrogen exists in the atmosphere but is converted by bacteria and algae into forms that can be used by plants and animals through biological fixation. Lightning and industrial processes also fix nitrogen. Plants take up nitrogen from the soil and animals get nitrogen from eating plants. Nitrogen is returned to the soil through animal waste or decay. Bacteria then convert nitrogen back into forms that can re-enter the atmosphere, completing the cycle. The nitrogen cycle is essential for providing the nutrient needs of all living things.
Nitrogen Cycle
Nitrogen is essential for plant and animal growth and is abundant in the atmosphere. Some bacteria and algae have the ability to "fix" nitrogen by converting atmospheric nitrogen to ammonia and nitrates that plants can use. This process of nitrogen fixation occurs through biological processes in legume root nodules and through lightning, as well as industrially. Plants take up fixed nitrogen and it enters the nitrogen cycle, being used by animals who then return it to the soil through waste. Soil bacteria convert nitrogen back to nitrates and nitrites and eventually back to atmospheric nitrogen, completing the cycle.
Nitrogen cycle
1. The nitrogen cycle describes how nitrogen is converted between its various forms and moves between the atmosphere, soil, plants, and animals.
2. Atmospheric nitrogen is converted to ammonia or nitrates through nitrogen fixation, which allows plants and animals to use it.
3. Nitrification and ammonification convert ammonia into other nitrogen forms that plants can use, and denitrification returns nitrogen to the atmosphere, completing the cycle.
Nitrogen cycle ppt
1) Nitrogen is essential for organisms but it exists mainly as unusable N2 gas in the atmosphere. It must be converted to biologically available forms through the nitrogen cycle.
2) The nitrogen cycle describes the movement of nitrogen between the atmosphere, biosphere, and lithosphere through processes like nitrogen fixation, uptake, mineralization, nitrification, and denitrification.
3) Nitrogen fixation converts atmospheric N2 to ammonium through processes like nitrogen-fixing bacteria in legume roots and the use of synthetic nitrogen fertilizers.
Nitrogen cycle
The nitrogen cycle is a natural process in which atmospheric nitrogen enters the soil and becomes part of living organisms. It is essential to living things and plays an important role in ecosystems. The steps of the nitrogen cycle are nitrogen fixation, nitrogen assimilation, ammonification, nitrification, and denitrification. Human activities like cultivation, harvesting, and fossil fuel use can disrupt the nitrogen cycle and cause over-supply of nitrogen in the environment, leading to issues like soil acidification and increased greenhouse gases.
The nitrogen cycle
The nitrogen cycle describes the movement of nitrogen through ecosystems. Nitrogen is absorbed by plants from the soil and incorporated into proteins. Animals get nitrogen by eating plant proteins. Bacteria break down nitrogenous waste from dead plants and animals, converting it into ammonium, then nitrites and nitrates, which enrich the soil. Lightning and bacteria also fix atmospheric nitrogen into forms usable by plants.
The Nitrogen Cycle
The nitrogen cycle describes how nitrogen is converted between its various forms and incorporated into living things. Nitrogen makes up 78.9% of the atmosphere but cannot be directly used by plants and animals. It must be converted to nitrogenous compounds through processes like nitrogen fixation, ammonification, nitrification, and denitrification. Legumes have root nodules containing rhizobia bacteria that convert nitrogen to ammonia. Ammonia is further converted to nitrates and nitrites by nitrifying bacteria. Plants take up nitrates to make proteins, which are consumed by animals. Dead plants and animal waste release ammonia, continuing the nitrogen cycle.
Nitrogen cycle
The nitrogen cycle consists of 5 main stages:
(1) Ammonification is the conversion of organic nitrogen into ammonium by microbes.
(2) Nitrification is the oxidation of ammonium to nitrite and then nitrate by bacteria.
(3) Plants uptake nitrate and convert it into amino acids and other nitrogen compounds.
(4) Nitrogen fixation converts atmospheric nitrogen to ammonium via bacteria and cyanobacteria.
(5) Denitrification reduces nitrates back to nitrogen gas which re-enters the atmosphere. The nitrogen cycle involves the circulation of nitrogen through air, soil, plants and animals via specialized microbes.
Nitrogen Fixation
Here are the answers to the questions:
1. Nitrogen is present in the form of N2 gas in the atmosphere.
2. The enzyme nitrogenase is responsible for splitting the triple N≡N bond in nitrogen fixation.
3. The Haber process is used in chemical nitrogen fixation to convert nitrogen gas to ammonia at high pressure and temperature.
4. A nodulated symbiosis is the formation of nodules in leguminous plants by Rhizobium bacteria, for example Rhizobium and chickpea.
C3 NITROGEN CYCLE REVISION QUESTIONS
The document discusses the nitrogen cycle, including the conversion of atmospheric nitrogen into a form that can be used by plants, animals, and humans through biological fixation and industrial nitrogen fixation. It asks questions about why plants need nitrogen, why they cannot absorb it directly from the atmosphere, and which type of bacteria is involved in converting nitrite to nitrate in soil.
Ppt nitrogen cycle
The document discusses the nitrogen cycle, which is the biogeochemical cycle by which nitrogen is converted between its various chemical forms. It involves the conversion of atmospheric nitrogen into organic nitrogen by biological nitrogen fixation, which is carried out by bacteria and cyanobacteria. This fixed nitrogen is then assimilated by plants and converted to protein and nucleic acids. The nitrogen in organic matter is then converted back to inorganic forms through ammonification, nitrification, and denitrification, completing the cycle. The nitrogen cycle is essential for life on Earth as it regulates the nitrogen necessary for all organisms.
Nitrogen cycle
The nitrogen cycle describes the transformation of nitrogen between its various chemical forms through biological and physical processes. Nitrogen is essential for plant growth but must be fixed from atmospheric nitrogen by bacteria, lightning, or symbiotic bacteria in legume root nodules before plants can use it. As plants and animals use and recycle nitrogen compounds, bacteria in the soil ultimately convert some back to atmospheric nitrogen to complete the cycle.
Carbon and nitrogen cycle
The document discusses the carbon and nitrogen cycles. It describes how carbon and nitrogen move between different reservoirs on Earth, including the atmosphere, living organisms, oceans, and fossil fuels. Key steps in the carbon cycle include photosynthesis, respiration, decomposition, and the burning of fossil fuels. The nitrogen cycle involves nitrogen fixation, decay, nitrification, and denitrification as microbes convert nitrogen between gas, organic, and inorganic forms. Human activities like burning fossil fuels are increasing carbon dioxide levels and affecting global climate.
Nitrogen cycle
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into various chemical forms as it circulates among the atmosphere and terrestrial and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is nitrogen, making it the largest pool of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems. The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle.
Nitrogen cycle
The nitrogen cycle describes the conversion of nitrogen between its various chemical forms through four processes: nitrogen fixation, ammonification/decay, nitrification, and denitrification. Nitrogen is essential for all life but must be processed from its abundant gas form in the atmosphere into organic compounds that plants and animals can use through nitrogen fixation. Decay and nitrification further convert nitrogen into different forms, while denitrification replenishes nitrogen gas in the atmosphere. The cycle illustrates microorganisms' key role in ecosystems and makes nitrogen biologically available while balancing its different forms.
Nitrogen cycle
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into various chemical forms as it circulates among the atmosphere, terrestrial, and marine ecosystems. ... Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.
Nitrogen cycle
The document summarizes the nitrogen cycle. It discusses the main sources of nitrogen including the atmosphere, soil, fertilizers and volcanic activity. It then describes the key processes in the nitrogen cycle including nitrogen fixation, ammonification, nitrification, and denitrification. Nitrogen fixation occurs through symbiotic and non-symbiotic bacteria. Ammonification and nitrification are multi-step biological processes converting organic and ammonia forms of nitrogen into nitrites and nitrates. Denitrification returns nitrogen to the atmosphere through bacteria. The factors that impact these nitrogen transformations such as oxygen, temperature, pH and carbon levels are also outlined.
Nutrient Cycles
The document discusses nutrient cycles at multiple levels - within ecosystems, globally, and how they interconnect. At the ecosystem level, nutrients cycle between living organisms and non-living components like soil, water and atmosphere through various processes. Globally, nutrient loss from one ecosystem becomes a gain for others, and the cycling of elements like carbon, oxygen, nitrogen and water occur at the planetary scale through the biosphere, atmosphere and lithosphere. Human activities are increasingly impacting global nutrient cycles.
nutrients cycle
This document provides an overview of the nitrogen and carbon cycles. It describes the key steps in each cycle, including nitrogen fixation, ammonification, nitrification, and denitrification for the nitrogen cycle. For the carbon cycle, it outlines how carbon is absorbed by plants through photosynthesis and released through respiration before being absorbed again in a repeating cycle. Various microorganisms and biochemical processes are involved at each step to transform nitrogen and carbon into different forms and recycle them in the environment.
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Nitrogen cycle - Honors only 2.04
The nitrogen cycle describes how nitrogen is converted between its various forms as it circulates in the biosphere and lithosphere. Atmospheric nitrogen is converted to ammonia or nitrates through nitrogen fixation, which occurs via lightning, industrial fixation, or biological fixation by bacteria. Ammonia is converted to nitrites and nitrates through nitrification by nitrifying bacteria. Organic nitrogen from dead organisms is broken down into ammonium through ammonification by bacteria. Nitrates are converted back to atmospheric nitrogen through denitrification, replenishing the nitrogen in the air.
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Nitrogen is an essential element for life that cycles between the atmosphere, soil, plants, and animals. The nitrogen cycle involves four main processes: nitrogen fixation, ammonification, nitrification, and denitrification. Nitrogen fixation involves converting nitrogen gas from the atmosphere into nitrogen compounds usable by organisms through lightning, industrial fixation, and biological fixation by bacteria. Ammonification and nitrification convert nitrogen wastes and residues into plant-usable inorganic forms through microorganisms in the soil. Denitrification returns nitrogen to the atmosphere, replenishing the atmospheric supply.
Nitrogen cycle
The document summarizes the nitrogen cycle. It describes the key steps in the nitrogen cycle as nitrogen fixation, nitrogen assimilation, ammonification, nitrification, and denitrification. Nitrogen fixation involves converting nitrogen gas from the atmosphere into inorganic nitrogen compounds usable by plants and animals. This is done mainly by nitrogen-fixing bacteria. The nitrogen is then assimilated by plants and animals and enters the ecosystem. As organisms die and decay, ammonification occurs which converts nitrogen into ammonia. Nitrification then transforms ammonia into nitrates which can be used by plants. Finally, denitrification returns nitrates to the atmosphere as nitrogen gas by bacteria. The document also discusses how human activities like fertilizer use and fossil fuel burning
Nitrogen cycle
The document discusses the nitrogen cycle. It describes how nitrogen exists in the atmosphere but is converted by bacteria and algae into forms that can be used by plants and animals through biological fixation. Lightning and industrial processes also fix nitrogen. Plants take up nitrogen from the soil and animals get nitrogen from eating plants. Nitrogen is returned to the soil through animal waste or decay. Bacteria then convert nitrogen back into forms that can re-enter the atmosphere, completing the cycle. The nitrogen cycle is essential for providing the nutrient needs of all living things.
Nitrogen Cycle
Nitrogen is essential for plant and animal growth and is abundant in the atmosphere. Some bacteria and algae have the ability to "fix" nitrogen by converting atmospheric nitrogen to ammonia and nitrates that plants can use. This process of nitrogen fixation occurs through biological processes in legume root nodules and through lightning, as well as industrially. Plants take up fixed nitrogen and it enters the nitrogen cycle, being used by animals who then return it to the soil through waste. Soil bacteria convert nitrogen back to nitrates and nitrites and eventually back to atmospheric nitrogen, completing the cycle.
Nitrogen cycle
1. The nitrogen cycle describes how nitrogen is converted between its various forms and moves between the atmosphere, soil, plants, and animals.
2. Atmospheric nitrogen is converted to ammonia or nitrates through nitrogen fixation, which allows plants and animals to use it.
3. Nitrification and ammonification convert ammonia into other nitrogen forms that plants can use, and denitrification returns nitrogen to the atmosphere, completing the cycle.
Nitrogen cycle ppt
1) Nitrogen is essential for organisms but it exists mainly as unusable N2 gas in the atmosphere. It must be converted to biologically available forms through the nitrogen cycle.
2) The nitrogen cycle describes the movement of nitrogen between the atmosphere, biosphere, and lithosphere through processes like nitrogen fixation, uptake, mineralization, nitrification, and denitrification.
3) Nitrogen fixation converts atmospheric N2 to ammonium through processes like nitrogen-fixing bacteria in legume roots and the use of synthetic nitrogen fertilizers.
Nitrogen cycle
The nitrogen cycle is a natural process in which atmospheric nitrogen enters the soil and becomes part of living organisms. It is essential to living things and plays an important role in ecosystems. The steps of the nitrogen cycle are nitrogen fixation, nitrogen assimilation, ammonification, nitrification, and denitrification. Human activities like cultivation, harvesting, and fossil fuel use can disrupt the nitrogen cycle and cause over-supply of nitrogen in the environment, leading to issues like soil acidification and increased greenhouse gases.
The nitrogen cycle
The nitrogen cycle describes the movement of nitrogen through ecosystems. Nitrogen is absorbed by plants from the soil and incorporated into proteins. Animals get nitrogen by eating plant proteins. Bacteria break down nitrogenous waste from dead plants and animals, converting it into ammonium, then nitrites and nitrates, which enrich the soil. Lightning and bacteria also fix atmospheric nitrogen into forms usable by plants.
The Nitrogen Cycle
The nitrogen cycle describes how nitrogen is converted between its various forms and incorporated into living things. Nitrogen makes up 78.9% of the atmosphere but cannot be directly used by plants and animals. It must be converted to nitrogenous compounds through processes like nitrogen fixation, ammonification, nitrification, and denitrification. Legumes have root nodules containing rhizobia bacteria that convert nitrogen to ammonia. Ammonia is further converted to nitrates and nitrites by nitrifying bacteria. Plants take up nitrates to make proteins, which are consumed by animals. Dead plants and animal waste release ammonia, continuing the nitrogen cycle.
Nitrogen cycle
The nitrogen cycle consists of 5 main stages:
(1) Ammonification is the conversion of organic nitrogen into ammonium by microbes.
(2) Nitrification is the oxidation of ammonium to nitrite and then nitrate by bacteria.
(3) Plants uptake nitrate and convert it into amino acids and other nitrogen compounds.
(4) Nitrogen fixation converts atmospheric nitrogen to ammonium via bacteria and cyanobacteria.
(5) Denitrification reduces nitrates back to nitrogen gas which re-enters the atmosphere. The nitrogen cycle involves the circulation of nitrogen through air, soil, plants and animals via specialized microbes.
Nitrogen Fixation
Here are the answers to the questions:
1. Nitrogen is present in the form of N2 gas in the atmosphere.
2. The enzyme nitrogenase is responsible for splitting the triple N≡N bond in nitrogen fixation.
3. The Haber process is used in chemical nitrogen fixation to convert nitrogen gas to ammonia at high pressure and temperature.
4. A nodulated symbiosis is the formation of nodules in leguminous plants by Rhizobium bacteria, for example Rhizobium and chickpea.
C3 NITROGEN CYCLE REVISION QUESTIONS
The document discusses the nitrogen cycle, including the conversion of atmospheric nitrogen into a form that can be used by plants, animals, and humans through biological fixation and industrial nitrogen fixation. It asks questions about why plants need nitrogen, why they cannot absorb it directly from the atmosphere, and which type of bacteria is involved in converting nitrite to nitrate in soil.
Ppt nitrogen cycle
The document discusses the nitrogen cycle, which is the biogeochemical cycle by which nitrogen is converted between its various chemical forms. It involves the conversion of atmospheric nitrogen into organic nitrogen by biological nitrogen fixation, which is carried out by bacteria and cyanobacteria. This fixed nitrogen is then assimilated by plants and converted to protein and nucleic acids. The nitrogen in organic matter is then converted back to inorganic forms through ammonification, nitrification, and denitrification, completing the cycle. The nitrogen cycle is essential for life on Earth as it regulates the nitrogen necessary for all organisms.
Nitrogen cycle
The nitrogen cycle describes the transformation of nitrogen between its various chemical forms through biological and physical processes. Nitrogen is essential for plant growth but must be fixed from atmospheric nitrogen by bacteria, lightning, or symbiotic bacteria in legume root nodules before plants can use it. As plants and animals use and recycle nitrogen compounds, bacteria in the soil ultimately convert some back to atmospheric nitrogen to complete the cycle.
Carbon and nitrogen cycle
The document discusses the carbon and nitrogen cycles. It describes how carbon and nitrogen move between different reservoirs on Earth, including the atmosphere, living organisms, oceans, and fossil fuels. Key steps in the carbon cycle include photosynthesis, respiration, decomposition, and the burning of fossil fuels. The nitrogen cycle involves nitrogen fixation, decay, nitrification, and denitrification as microbes convert nitrogen between gas, organic, and inorganic forms. Human activities like burning fossil fuels are increasing carbon dioxide levels and affecting global climate.
Nitrogen cycle
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into various chemical forms as it circulates among the atmosphere and terrestrial and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is nitrogen, making it the largest pool of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems. The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle.
Nitrogen cycle
The nitrogen cycle describes the conversion of nitrogen between its various chemical forms through four processes: nitrogen fixation, ammonification/decay, nitrification, and denitrification. Nitrogen is essential for all life but must be processed from its abundant gas form in the atmosphere into organic compounds that plants and animals can use through nitrogen fixation. Decay and nitrification further convert nitrogen into different forms, while denitrification replenishes nitrogen gas in the atmosphere. The cycle illustrates microorganisms' key role in ecosystems and makes nitrogen biologically available while balancing its different forms.
Nitrogen cycle
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into various chemical forms as it circulates among the atmosphere, terrestrial, and marine ecosystems. ... Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.
Nitrogen cycle
The document summarizes the nitrogen cycle. It discusses the main sources of nitrogen including the atmosphere, soil, fertilizers and volcanic activity. It then describes the key processes in the nitrogen cycle including nitrogen fixation, ammonification, nitrification, and denitrification. Nitrogen fixation occurs through symbiotic and non-symbiotic bacteria. Ammonification and nitrification are multi-step biological processes converting organic and ammonia forms of nitrogen into nitrites and nitrates. Denitrification returns nitrogen to the atmosphere through bacteria. The factors that impact these nitrogen transformations such as oxygen, temperature, pH and carbon levels are also outlined.
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This document provides an overview of the nitrogen and carbon cycles. It describes the key steps in each cycle, including nitrogen fixation, ammonification, nitrification, and denitrification for the nitrogen cycle. For the carbon cycle, it outlines how carbon is absorbed by plants through photosynthesis and released through respiration before being absorbed again in a repeating cycle. Various microorganisms and biochemical processes are involved at each step to transform nitrogen and carbon into different forms and recycle them in the environment.
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Week 11 nutrient cycles
- 1. Nutrient Cycles Nutrient Cycling Carbon Cycle Global Warming Nitrogen Cycle
- 5. Nutrients in air soil and water Producers consumers decomposers photosynthesis feeding decay respiration and excretion feeding Unavailable organic nutrients coal, oil, peat Unavailable inorganic nutrients, mineral in rocks fossilisation burning erosion
- 6. The Carbon Cycle What is a carbon sink?
- 7. The Carbon Cycle burning respiration photosynthesis
- 8. Global Warming and the Greenhouse Effect
- 9. The Greenhouse Effect G.H. gases don’t absorb visible wavelengths of light What would reflect solar radiation? What form does the energy become when absorbed by the Earth? G.H. gases can absorb and re-emit infra red radiation
- 10. Global Dimming
- 13. Global Warming and Crop Yields Why are food prices predicted to increase due to global warming? How will increased CO 2 effect crop yields? How will increased temperature effect crop yields? So what’s the problem….?
- 15. Global Warming and Crop Yields: Rice Is there a correlation? What is the relationship between yield and minimum temperature? What is the relationship between yield and light intensity?
- 16. Global Warming and Crop Yields: Rice What has the biggest effect on yield? Which factors will change due to global warming? How can we explain this effect?
- 17. Global Warming and Migration What will happen to these biomes as the global temperature increases? How will organisms respond? Describe this in terms of niches.
- 18. Global Warming and Migration
- 20. Its all about the bacteria!
- 21. Nutrients in air soil and water Producers consumers decomposers photosynthesis feeding decay respiration and excretion feeding Unavailable organic nutrients coal, oil, peat Unavailable inorganic nutrients, mineral in rocks fossilisation burning erosion
- 38. The Nitrogen Cycle Nitrogen-fixing bacteria in root nodules. Nitrogen-fixing bacteria Nitrite bacteria Nitrate bacteria Denitrifying bacteria Haber process: fertilisers Lightning
- 41. One post per idea. Use your real names! Chemical or Organic? http://www.wallwisher.com/wall/kegschgbiology13A
- 42. One post per idea. Use your real names! Chemical or Organic? http://www.wallwisher.com/wall/kegschgbiology13b
- 44. Eutrophication
- 46. Eutrophication Sewage and farm waste be decomposed by bacteria as well as add nutrients to water.
- 47. Eutrophication: Data Interpretation What does this chart suggest about eutrophication in the esturies of the USA? What is the percentage of esturaies with high percentage eutrophication? Which indicator suggests there is a lot of eutrophication in the USA? What does the Dissolved Oxygen indicator suggest?
- 48. Are these conlusions valid? The East Coast has less eutrophication
- 49. Are these conlusions valid? Eutrophication is caused by an increase in human population
- 50. Are these conlusions valid? Eutrophication is increased by warmer temperatures.
- 51. Are these conlusions valid? Eutrophication is caused by farming.
- 52. Eutrophication: The Limiting Factor?
- 53. Eutrophication: the limiting factor?
Editor's Notes
- Saprobiotic organisms
- Search youtube for “300 years of fossil fuels in 300 seconds”
- Graphs uses 1978 as a reference point
- Water availability, density of planting, genetic variety of rice, nutrient availability etc. Monitor variable that can’t be controlled
- Migration: Lower to higher latitudes
- Saprobiotic organisms
- Haber process requires high temperatures and pressures to achieve what nitrogenase does at environmental temperatures
- Haber process requires high temperatures and pressures to achieve what nitrogenase does at environmental temperatures
- Clay and humus particles are negatively charged, NH4+ ions stick to particles, No3- ions repelled by particles
- Clay and humus particles are negatively charged, NH4+ ions stick to particles, No3- ions repelled by particles
- Paddy fields contain a lot of cyanobacteria fixing nitrogen gas into ammonia.
- Have a look at page 98 - 99
- Use google earth to show caspian sea, great lakes – lake Erie, UK coast etc
- 15/99 = 15.15%, Chla = Chlorphyll a, DO = dissolved oxygen, Nuisance/toxic blooms = frequency of algal blooms, SAV = submerged aquatic vegetation
- Pollution from duck farms, correlation between P in water and phytoplankton, but actual cause is N which is taken up quickly by phytoplankton and so is not measurable in water.
- Addition of carbon and nitrogen alone had no effect, phosphates caused algal bloom. Done in 1974 led to ban on phosphates