Final published version
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Research output: Contribution to Journal/Magazine › Letter › peer-review
Research output: Contribution to Journal/Magazine › Letter › peer-review
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TY - JOUR
T1 - Plastic and genetic responses of a common sedge to warming have contrasting effects on carbon cycle processes
AU - Walker, Tom W.N.
AU - Weckwerth, Wolfram
AU - Bragazza, Luca
AU - Fragner, Lena
AU - Forde, Brian G.
AU - Ostle, Nicholas J.
AU - Signarbieux, Constant
AU - Sun, Xiaoliang
AU - Ward, Susan E.
AU - Bardgett, Richard D.
PY - 2019/1
Y1 - 2019/1
N2 - Climate warming affects plant physiology through genetic adaptation and phenotypic plasticity, but little is known about how these mechanisms influence ecosystem processes. We used three elevation gradients and a reciprocal transplant experiment to show that temperature causes genetic change in the sedge Eriophorum vaginatum. We demonstrate that plants originating from warmer climate produce fewer secondary compounds, grow faster and accelerate carbon dioxide (CO2) release to the atmosphere. However, warmer climate also caused plasticity in E. vaginatum, inhibiting nitrogen metabolism, photosynthesis and growth and slowing CO2 release into the atmosphere. Genetic differentiation and plasticity in E. vaginatum thus had opposing effects on CO2 fluxes, suggesting that warming over many generations may buffer, or reverse, the short-term influence of this species over carbon cycle processes. Our findings demonstrate the capacity for plant evolution to impact ecosystem processes, and reveal a further mechanism through which plants will shape ecosystem responses to climate change.
AB - Climate warming affects plant physiology through genetic adaptation and phenotypic plasticity, but little is known about how these mechanisms influence ecosystem processes. We used three elevation gradients and a reciprocal transplant experiment to show that temperature causes genetic change in the sedge Eriophorum vaginatum. We demonstrate that plants originating from warmer climate produce fewer secondary compounds, grow faster and accelerate carbon dioxide (CO2) release to the atmosphere. However, warmer climate also caused plasticity in E. vaginatum, inhibiting nitrogen metabolism, photosynthesis and growth and slowing CO2 release into the atmosphere. Genetic differentiation and plasticity in E. vaginatum thus had opposing effects on CO2 fluxes, suggesting that warming over many generations may buffer, or reverse, the short-term influence of this species over carbon cycle processes. Our findings demonstrate the capacity for plant evolution to impact ecosystem processes, and reveal a further mechanism through which plants will shape ecosystem responses to climate change.
KW - Carbon cycle
KW - climate feedbacks
KW - climate warming
KW - Eriophorum vaginatum
KW - genetic adaptation
KW - intraspecific variation
KW - natural selection
KW - phenotypic plasticity
KW - plant ecophysiology
KW - plant metabolism
U2 - 10.1111/ele.13178
DO - 10.1111/ele.13178
M3 - Letter
C2 - 30556313
AN - SCOPUS:85058693861
VL - 22
SP - 159
EP - 169
JO - Ecology Letters
JF - Ecology Letters
SN - 1461-023X
IS - 1
ER -