SlideShare a Scribd company logo

Could co-limitation be caused by different nutrients limiting shoots and roots? Melany Fisk

M
M

HUBBARD BROOK ECOSYSTEM STUDY 57TH ANNUAL COOPERATORS' MEETING

Could co-limitation be caused by different nutrients limiting shoots and roots? Melany Fisk

1 of 11
Download to read offline
Intro to MELNHE
Elser et al. (2007) Ecology Letters
Intro to MELNHE
• Co-limitation: adding 2
resources together
increases productivity
more so than adding
either alone
• Lots of interest; limited
mechanistic
understanding
• MELNHE study
conceived to examine
co-limitation in more
detail
Thirteen forest stands:
• 3 sites: Hubbard Brook (HB), Jeffers Brook (JB),
Bartlett (BEF)
• 3 ages: young (~30 yrs), mid (~45 yrs), and mature
(>100 yrs)
• Color-coded
General question:
• Is forest productivity co-limited by N and P?
So far (among many results):
• Tree growth limited primarily by P (2011-2015;
Goswami et al. 2018)
• No obvious co-limitation detected
N:
30 kg/ha/yr
P:
10 kg/ha/yr
N+P
Control
One forest stand: four 50
x 50 m treatment plots
NxP fertilization initiated in 2011
Testing limitation
control nutrient addition
Limitation is inferred if added
nutrient increases growth
What about belowground?
Testing limitation of root growth
control nutrient addition
Limitation is inferred if added
nutrient increases growth
What about belowground?
(1) Direct nutrient limitation of root
growth
Testing limitation of root growth
control nutrient addition
Limitation is inferred if added
nutrient increases growth
What about belowground?
(1) Direct nutrient limitation of root
growth
(2) Allocation response to
aboveground limitation
- alleviating aboveground
limitation reduces growth
Ad

Recommended

Nitrogen, phosphorus and fine roots
Nitrogen, phosphorus and fine rootsNitrogen, phosphorus and fine roots
Nitrogen, phosphorus and fine rootsmelnhe
 
Aboveground growth responds more to P than N
Aboveground growth responds more to P than NAboveground growth responds more to P than N
Aboveground growth responds more to P than Nmelnhe
 
Root foraging for apatite is influenced by N and P availability
Root foraging for apatite is influenced by N and P availabilityRoot foraging for apatite is influenced by N and P availability
Root foraging for apatite is influenced by N and P availabilitymelnhe
 
MELNHE overview 2016
MELNHE overview 2016MELNHE overview 2016
MELNHE overview 2016melnhe
 
Hb2015 hayden-decomp
Hb2015 hayden-decompHb2015 hayden-decomp
Hb2015 hayden-decompmelnhe
 
What is co-limitation, really?
What is co-limitation, really?What is co-limitation, really?
What is co-limitation, really?melnhe
 
Agren 2012 - by Brian Smithers
Agren 2012 - by Brian SmithersAgren 2012 - by Brian Smithers
Agren 2012 - by Brian SmithersNoam Ross
 

More Related Content

Similar to Could co-limitation be caused by different nutrients limiting shoots and roots? Melany Fisk

N-P co-limitation in young northern hardwood forest. Tim Fahey
N-P co-limitation in young northern hardwood forest. Tim FaheyN-P co-limitation in young northern hardwood forest. Tim Fahey
N-P co-limitation in young northern hardwood forest. Tim Faheymelnhe
 
Biology: Ecosystems And Communities
Biology: Ecosystems And CommunitiesBiology: Ecosystems And Communities
Biology: Ecosystems And CommunitiesMichael Edgar
 
Rgp of selected hardwood tree species
Rgp of selected hardwood tree speciesRgp of selected hardwood tree species
Rgp of selected hardwood tree speciesOnofre Corpuz
 
Competition for space, light and nutrient in forest stands shanta kafle
Competition for space, light and nutrient in forest stands   shanta kafleCompetition for space, light and nutrient in forest stands   shanta kafle
Competition for space, light and nutrient in forest stands shanta kaflesahl_2fast
 
Trees and-dietary-diversity-in-africa
Trees and-dietary-diversity-in-africaTrees and-dietary-diversity-in-africa
Trees and-dietary-diversity-in-africaTeresa Borelli
 
Biodiverse - Rosauer talk @ iEvoBio conference June 2010
Biodiverse - Rosauer talk @ iEvoBio conference June 2010Biodiverse - Rosauer talk @ iEvoBio conference June 2010
Biodiverse - Rosauer talk @ iEvoBio conference June 2010Dan Rosauer
 
The contribution of forests and trees to food production in the tropics: A sy...
The contribution of forests and trees to food production in the tropics: A sy...The contribution of forests and trees to food production in the tropics: A sy...
The contribution of forests and trees to food production in the tropics: A sy...CIFOR-ICRAF
 
The contribution of forests and trees to food production in the tropics: A sy...
The contribution of forests and trees to food production in the tropics: A sy...The contribution of forests and trees to food production in the tropics: A sy...
The contribution of forests and trees to food production in the tropics: A sy...CIFOR-ICRAF
 
Nuts & Bolts: Genetically Appropriate Choices for Plant Materials to Maintain...
Nuts & Bolts: Genetically Appropriate Choices for Plant Materials to Maintain...Nuts & Bolts: Genetically Appropriate Choices for Plant Materials to Maintain...
Nuts & Bolts: Genetically Appropriate Choices for Plant Materials to Maintain...nycparksnmd
 

Similar to Could co-limitation be caused by different nutrients limiting shoots and roots? Melany Fisk (10)

N-P co-limitation in young northern hardwood forest. Tim Fahey
N-P co-limitation in young northern hardwood forest. Tim FaheyN-P co-limitation in young northern hardwood forest. Tim Fahey
N-P co-limitation in young northern hardwood forest. Tim Fahey
 
Biology: Ecosystems And Communities
Biology: Ecosystems And CommunitiesBiology: Ecosystems And Communities
Biology: Ecosystems And Communities
 
Rgp of selected hardwood tree species
Rgp of selected hardwood tree speciesRgp of selected hardwood tree species
Rgp of selected hardwood tree species
 
Competition for space, light and nutrient in forest stands shanta kafle
Competition for space, light and nutrient in forest stands   shanta kafleCompetition for space, light and nutrient in forest stands   shanta kafle
Competition for space, light and nutrient in forest stands shanta kafle
 
Trees and-dietary-diversity-in-africa
Trees and-dietary-diversity-in-africaTrees and-dietary-diversity-in-africa
Trees and-dietary-diversity-in-africa
 
Amy Ickowitz, CIFOR "Trees and Dietary Diversity in Africa"
Amy Ickowitz, CIFOR "Trees and Dietary Diversity in Africa"Amy Ickowitz, CIFOR "Trees and Dietary Diversity in Africa"
Amy Ickowitz, CIFOR "Trees and Dietary Diversity in Africa"
 
Biodiverse - Rosauer talk @ iEvoBio conference June 2010
Biodiverse - Rosauer talk @ iEvoBio conference June 2010Biodiverse - Rosauer talk @ iEvoBio conference June 2010
Biodiverse - Rosauer talk @ iEvoBio conference June 2010
 
The contribution of forests and trees to food production in the tropics: A sy...
The contribution of forests and trees to food production in the tropics: A sy...The contribution of forests and trees to food production in the tropics: A sy...
The contribution of forests and trees to food production in the tropics: A sy...
 
The contribution of forests and trees to food production in the tropics: A sy...
The contribution of forests and trees to food production in the tropics: A sy...The contribution of forests and trees to food production in the tropics: A sy...
The contribution of forests and trees to food production in the tropics: A sy...
 
Nuts & Bolts: Genetically Appropriate Choices for Plant Materials to Maintain...
Nuts & Bolts: Genetically Appropriate Choices for Plant Materials to Maintain...Nuts & Bolts: Genetically Appropriate Choices for Plant Materials to Maintain...
Nuts & Bolts: Genetically Appropriate Choices for Plant Materials to Maintain...
 

More from melnhe

Distinguishing N and P addition from the air using imaging spectroscopy. Alex...
Distinguishing N and P addition from the air using imaging spectroscopy. Alex...Distinguishing N and P addition from the air using imaging spectroscopy. Alex...
Distinguishing N and P addition from the air using imaging spectroscopy. Alex...melnhe
 
Germinants: The next generation. Denise Rauschendorfer
Germinants: The next generation. Denise RauschendorferGerminants: The next generation. Denise Rauschendorfer
Germinants: The next generation. Denise Rauschendorfermelnhe
 
Mycorrhizal type and co-limitation of forest productivity. Noah Blumenthal
Mycorrhizal type and co-limitation of forest productivity. Noah BlumenthalMycorrhizal type and co-limitation of forest productivity. Noah Blumenthal
Mycorrhizal type and co-limitation of forest productivity. Noah Blumenthalmelnhe
 
Grow with the changes: Forest succession and woody debris. Joe Nash
Grow with the changes: Forest succession and woody debris. Joe NashGrow with the changes: Forest succession and woody debris. Joe Nash
Grow with the changes: Forest succession and woody debris. Joe Nashmelnhe
 
Litterfall and soil respiration fluxes in the MELNHE study. Thomas Mann
Litterfall and soil respiration fluxes in the MELNHE study. Thomas MannLitterfall and soil respiration fluxes in the MELNHE study. Thomas Mann
Litterfall and soil respiration fluxes in the MELNHE study. Thomas Mannmelnhe
 
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...melnhe
 
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...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...melnhe
 
The timing of senescence affects foliar p resorption dan hong
The timing of senescence affects foliar p resorption   dan hongThe timing of senescence affects foliar p resorption   dan hong
The timing of senescence affects foliar p resorption dan hongmelnhe
 
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 congressSpace wars  the fight for light in the stands of bartlett   sarah congress
Space wars the fight for light in the stands of bartlett sarah congressmelnhe
 
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...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...melnhe
 
Fruiting response of ectomycorrhizal fungi to nutrient additions claudia vi...
Fruiting response of ectomycorrhizal fungi to nutrient additions   claudia vi...Fruiting response of ectomycorrhizal fungi to nutrient additions   claudia vi...
Fruiting response of ectomycorrhizal fungi to nutrient additions claudia vi...melnhe
 
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 butlerDoes the fate of n depend on p availability in soil   - samuel butler
Does the fate of n depend on p availability in soil - samuel butlermelnhe
 
Belowground c allocation estimated as soil respiration minus aboveground litt...
Belowground c allocation estimated as soil respiration minus aboveground litt...Belowground c allocation estimated as soil respiration minus aboveground litt...
Belowground c allocation estimated as soil respiration minus aboveground litt...melnhe
 
Baby boomers are there any surviving germinants from the recent mast year -...
Baby boomers  are there any surviving germinants from the recent mast year  -...Baby boomers  are there any surviving germinants from the recent mast year  -...
Baby boomers are there any surviving germinants from the recent mast year -...melnhe
 
And you thought there were no earthworms in our forests
And you thought there were no earthworms in our forests  And you thought there were no earthworms in our forests
And you thought there were no earthworms in our forests melnhe
 
Intro for asm workshop see
Intro for asm workshop seeIntro for asm workshop see
Intro for asm workshop seemelnhe
 
Asm2018 7 young
Asm2018 7 youngAsm2018 7 young
Asm2018 7 youngmelnhe
 
Asm2018 6 dietze
Asm2018 6 dietzeAsm2018 6 dietze
Asm2018 6 dietzemelnhe
 
Asm2018 5 yanai
Asm2018 5 yanaiAsm2018 5 yanai
Asm2018 5 yanaimelnhe
 
Asm2018 4 y.yang
Asm2018 4 y.yangAsm2018 4 y.yang
Asm2018 4 y.yangmelnhe
 

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...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 RauschendorferGerminants: 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 BlumenthalMycorrhizal 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 NashGrow 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 MannLitterfall and soil respiration fluxes in the MELNHE study. Thomas Mann
Litterfall and soil respiration fluxes in the MELNHE study. Thomas Mann
 
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
 
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...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 hongThe 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 congressSpace 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...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...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 butlerDoes 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...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  -...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  And you thought there were no earthworms in our forests
And you thought there were no earthworms in our forests
 
Intro for asm workshop see
Intro for asm workshop seeIntro for asm workshop see
Intro for asm workshop see
 
Asm2018 7 young
Asm2018 7 youngAsm2018 7 young
Asm2018 7 young
 
Asm2018 6 dietze
Asm2018 6 dietzeAsm2018 6 dietze
Asm2018 6 dietze
 
Asm2018 5 yanai
Asm2018 5 yanaiAsm2018 5 yanai
Asm2018 5 yanai
 
Asm2018 4 y.yang
Asm2018 4 y.yangAsm2018 4 y.yang
Asm2018 4 y.yang
 

Recently uploaded

STS NEW BIODIVERSITY TODAY - General Education
STS NEW  BIODIVERSITY  TODAY - General EducationSTS NEW  BIODIVERSITY  TODAY - General Education
STS NEW BIODIVERSITY TODAY - General EducationCARLAPASCUAL5
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Environment
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Environment
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Environment
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Environment
 
Disaster_Management_A_Disaster_Managers (1).pdf
Disaster_Management_A_Disaster_Managers (1).pdfDisaster_Management_A_Disaster_Managers (1).pdf
Disaster_Management_A_Disaster_Managers (1).pdfLataJimma
 
Septic tank, septictank, septic tank biofil, biotech septic tank
Septic tank, septictank, septic tank biofil, biotech septic tankSeptic tank, septictank, septic tank biofil, biotech septic tank
Septic tank, septictank, septic tank biofil, biotech septic tankBiotech Internasioanal
 
Coffs Harbour Australie Handelsmissie presentatie
Coffs Harbour Australie Handelsmissie presentatieCoffs Harbour Australie Handelsmissie presentatie
Coffs Harbour Australie Handelsmissie presentatieMetaSus
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Environment
 
gaps in hybrid cookstove literature call for future research to develop sust...
gaps in hybrid cookstove literature call for future  research to develop sust...gaps in hybrid cookstove literature call for future  research to develop sust...
gaps in hybrid cookstove literature call for future research to develop sust...bhupendrakoshti
 
Revisions to the Enforcement Rules of the Climate Change Response Act
Revisions to the Enforcement Rules of the Climate Change Response ActRevisions to the Enforcement Rules of the Climate Change Response Act
Revisions to the Enforcement Rules of the Climate Change Response Actccappr
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Environment
 
Septic tank, septictank, septic tank biofil, biotech septic tank
Septic tank, septictank, septic tank biofil, biotech septic tankSeptic tank, septictank, septic tank biofil, biotech septic tank
Septic tank, septictank, septic tank biofil, biotech septic tankBiotech Internasioanal
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Environment
 
AWARENESS ON SOUND POLLUTION AND REMEDIAL MEASURES
AWARENESS ON SOUND POLLUTION AND REMEDIAL MEASURESAWARENESS ON SOUND POLLUTION AND REMEDIAL MEASURES
AWARENESS ON SOUND POLLUTION AND REMEDIAL MEASURESArdraD1
 

Recently uploaded (20)

STS NEW BIODIVERSITY TODAY - General Education
STS NEW  BIODIVERSITY  TODAY - General EducationSTS NEW  BIODIVERSITY  TODAY - General Education
STS NEW BIODIVERSITY TODAY - General Education
 
Soil Profile
Soil Profile Soil Profile
Soil Profile
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
 
Encouraging Urban Green Infrastructure Practices for Climate Resiliency
Encouraging Urban Green Infrastructure Practices for Climate ResiliencyEncouraging Urban Green Infrastructure Practices for Climate Resiliency
Encouraging Urban Green Infrastructure Practices for Climate Resiliency
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
 
Disaster_Management_A_Disaster_Managers (1).pdf
Disaster_Management_A_Disaster_Managers (1).pdfDisaster_Management_A_Disaster_Managers (1).pdf
Disaster_Management_A_Disaster_Managers (1).pdf
 
Septic tank, septictank, septic tank biofil, biotech septic tank
Septic tank, septictank, septic tank biofil, biotech septic tankSeptic tank, septictank, septic tank biofil, biotech septic tank
Septic tank, septictank, septic tank biofil, biotech septic tank
 
Coffs Harbour Australie Handelsmissie presentatie
Coffs Harbour Australie Handelsmissie presentatieCoffs Harbour Australie Handelsmissie presentatie
Coffs Harbour Australie Handelsmissie presentatie
 
Scaling Agroforestry in US Agriculture AM
Scaling Agroforestry in US Agriculture AMScaling Agroforestry in US Agriculture AM
Scaling Agroforestry in US Agriculture AM
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
 
gaps in hybrid cookstove literature call for future research to develop sust...
gaps in hybrid cookstove literature call for future  research to develop sust...gaps in hybrid cookstove literature call for future  research to develop sust...
gaps in hybrid cookstove literature call for future research to develop sust...
 
Connecting Communities: Relationship Building to Diversify Participation
Connecting Communities: Relationship Building to Diversify Participation Connecting Communities: Relationship Building to Diversify Participation
Connecting Communities: Relationship Building to Diversify Participation
 
Acoustic Doors | Fire Doors | Envirotech
Acoustic Doors | Fire Doors | EnvirotechAcoustic Doors | Fire Doors | Envirotech
Acoustic Doors | Fire Doors | Envirotech
 
Revisions to the Enforcement Rules of the Climate Change Response Act
Revisions to the Enforcement Rules of the Climate Change Response ActRevisions to the Enforcement Rules of the Climate Change Response Act
Revisions to the Enforcement Rules of the Climate Change Response Act
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
 
Septic tank, septictank, septic tank biofil, biotech septic tank
Septic tank, septictank, septic tank biofil, biotech septic tankSeptic tank, septictank, septic tank biofil, biotech septic tank
Septic tank, septictank, septic tank biofil, biotech septic tank
 
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
OECD Global Forum on the Environment dedicated to Per- and Polyfluoroalkyl Su...
 
AWARENESS ON SOUND POLLUTION AND REMEDIAL MEASURES
AWARENESS ON SOUND POLLUTION AND REMEDIAL MEASURESAWARENESS ON SOUND POLLUTION AND REMEDIAL MEASURES
AWARENESS ON SOUND POLLUTION AND REMEDIAL MEASURES
 

Could co-limitation be caused by different nutrients limiting shoots and roots? Melany Fisk

  • 2. Elser et al. (2007) Ecology Letters Intro to MELNHE • Co-limitation: adding 2 resources together increases productivity more so than adding either alone • Lots of interest; limited mechanistic understanding • MELNHE study conceived to examine co-limitation in more detail
  • 3. Thirteen forest stands: • 3 sites: Hubbard Brook (HB), Jeffers Brook (JB), Bartlett (BEF) • 3 ages: young (~30 yrs), mid (~45 yrs), and mature (>100 yrs) • Color-coded General question: • Is forest productivity co-limited by N and P? So far (among many results): • Tree growth limited primarily by P (2011-2015; Goswami et al. 2018) • No obvious co-limitation detected N: 30 kg/ha/yr P: 10 kg/ha/yr N+P Control One forest stand: four 50 x 50 m treatment plots NxP fertilization initiated in 2011
  • 4. Testing limitation control nutrient addition Limitation is inferred if added nutrient increases growth What about belowground?
  • 5. Testing limitation of root growth control nutrient addition Limitation is inferred if added nutrient increases growth What about belowground? (1) Direct nutrient limitation of root growth
  • 6. Testing limitation of root growth control nutrient addition Limitation is inferred if added nutrient increases growth What about belowground? (1) Direct nutrient limitation of root growth (2) Allocation response to aboveground limitation - alleviating aboveground limitation reduces growth
  • 7. Testing limitation of root growth control nutrient-rich patch (hotspot) Limitation is inferred if added nutrient increases growth What about belowground? (1) Direct nutrient limitation of root growth (2) Allocation response to aboveground limitation - alleviating aboveground limitation reduces growth - foraging response to nutrient heterogeneity
  • 8. Testing limitation of root growth Question: Is root growth controlled by (1) belowground nutrient limitation, or (2) allocation in response to aboveground limitation? (Shan et al. in review) Used root ingrowth cores in 3 mature forest stands, 2014.
  • 9. Root growth: 3 mature stands Fine root growth was greater in response to N addition (direct nutrient limitation) No response to P addition (Shan et al. in review) *
  • 10. Root growth: 3 mature stands Fine roots foraged for P (allocation response to aboveground limitation) Phosphorus hotspot Control soil (Shan et al. in review) Fine root ingrowth length (cm/core)
  • 11. Conclusions Fine roots forage for P but their growth is limited by N Whole-tree growth may be co-limited by N and P Does N limit P acquisition? Acknowledgements: Funding from LTER, NSF, USDA; support from HBEF, BEF; participation of many students P limitation N limitation