Reference : Thermal optimality of net ecosystem exchange of carbon dioxide and underlying mechanisms
Scientific journals : Article
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/122856
Thermal optimality of net ecosystem exchange of carbon dioxide and underlying mechanisms
English
Niu, Shuli mailto [University of Oklahoma > Department of Botany and Microbiology > > >]
Fei, Shenfeng [ > > ]
Yuan, Wenping [ > > ]
Schimel, David [ > > ]
Ammann, Christof [ > > ]
Arain, Altaf [ > > ]
Arneth, Almut [ > > ]
Aubinet, Marc mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
Barr, Alan [ > > ]
Beringer, Jason [ > > ]
Bernhofer, Christian [ > > ]
Black, T. Andrew [ > > ]
Buchmann, Nina [ > > ]
Cescatti, Alessandro [ > > ]
Chen, Jiquan [ > > ]
Davis, Kenneth J. [ > > ]
Dellwik, Ebba [ > > ]
Desai, Ankur R. [ > > ]
Etzold, Sophia [ > > ]
François, Louis mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Modélisation du climat et des cycles biogéochimiques >]
Gianelle, Damiano [ > > ]
Gielen, Bert [ > > ]
Goldstein, Allen [ > > ]
Groenendijk, Margriet [ > > ]
Gu, Lianhong [ > > ]
et al. [ > > ]
2012
New Phytologist
Blackwell Publishing
194
775-783
Yes (verified by ORBi)
International
0028-646X
1469-8137
Oxford
United Kingdom
[en] climate change ; optimum temperature ; temperature acclimation ; temperature adaptation ; thermal optimality
[en] • It is well established that individual organisms can acclimate and adapt to temperature to
optimize their functioning. However, thermal optimization of ecosystems, as an assemblage
of organisms, has not been examined at broad spatial and temporal scales.
• Here, we compiled data from 169 globally distributed sites of eddy covariance and quantified
the temperature response functions of net ecosystem exchange (NEE), an ecosystem-
level property, to determine whether NEE shows thermal optimality and to explore
the underlying mechanisms.
• We found that the temperature response of NEE followed a peak curve, with the optimum
temperature (corresponding to the maximum magnitude of NEE) being positively correlated
with annual mean temperature over years and across sites. Shifts of the optimum temperature
of NEE were mostly a result of temperature acclimation of gross primary productivity (upward
shift of optimum temperature) rather than changes in the temperature sensitivity of ecosystem
respiration.
• Ecosystem-level thermal optimality is a newly revealed ecosystem property, presumably
reflecting associated evolutionary adaptation of organisms within ecosystems, and has the
potential to significantly regulate ecosystem–climate change feedbacks. The thermal optimality
of NEE has implications for understanding fundamental properties of ecosystems in
changing environments and benchmarking global models.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/122856

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