Air temperature optima of vegetation productivity across global biomes
Huang, M. (Peking University. Sino-French Institute for Earth System Science)
Piao, Shilong (Peking University. Sino-French Institute for Earth System Science)
Wang, Xuhui (Peking University. Sino-French Institute for Earth System Science)
Peng, S. (Peking University. Sino-French Institute for Earth System Science)
Wang, K. (Peking University. Sino-French Institute for Earth System Science)
Gao, Mengdi (Peking University. Sino-French Institute for Earth System Science)
He, Y. (Peking University. Sino-French Institute for Earth System Science)
Liu, Ying (Peking University. Sino-French Institute for Earth System Science)
Wang, T. (Chinese Academy of Sciences. Key Laboratory of Alpine Ecology and Biodiversity)
Ciais, Philippe (Laboratoire des Sciences du Climat et de l'Environnement)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Keenan, T. F. (Lawrence Berkeley National Laboratory)
Berry, J. A. (Carnegie Institution for Science (Washington, Estats Units d'Amèrica). Department of Global Ecology)
Mao, J. (Oak Ridge National Laboratory. Environmental Sciences Division)
Shi, X. (Oak Ridge National Laboratory. Environmental Sciences Division)
Alkama, Ramdane (European Commission. Joint Research Centre)
Cescatti, Alessandro (European Commission. Joint Research Centre)
Cuntz, Matthias (Université de Lorraine)
De Deurwaerder, Hannes (Ghent University. CAVElab Computational and Applied Vegetation Ecology)
Verbeeck, H. (Ghent University. CAVElab Computational and Applied Vegetation Ecology)
Luo, Yiqi (Northern Arizona University. Department of Biological Sciences)
Myneni, Ranga B. (Boston University. Department of Earth and Environment)
Niu, S. (Chinese Academy of Sciences. Key Laboratory of Ecosystem Network Observation and Modeling)
Yuan, Wenping (Sun Yat-Sen University. School of Atmospheric Sciences)
Wu, J. (Brookhaven National Laboratory. Environmental and Climate Sciences Department)
Janssens, Ivan (University of Antwer. Plants and Vegetation Ecology)

Date:	2019
Abstract:	The global distribution of the optimum air temperature for ecosystem-level gross primary productivity ({\it{T}}_{{\mathrm{opt}}}^{{\mathrm{eco}}}) is poorly understood, despite its importance for ecosystem carbon uptake under future warming. We provide empirical evidence for the existence of such an optimum, using measurements of in situ eddy covariance and satellite-derived proxies, and report its global distribution. T_{\mathrm{opt}}^{\mathrm{eco}} is consistently lower than the physiological optimum temperature of leaf-level photosynthetic capacity, which typically exceeds 30 °C. The global average T_{\mathrm{opt}}^{\mathrm{eco}} is estimated to be 23 ± 6 °C, with warmer regions having higher T_{\mathrm{opt}}^{\mathrm{eco}} values than colder regions. In tropical forests in particular, T_{\mathrm{opt}}^{\mathrm{eco}} is close to growing-season air temperature and is projected to fall below it under all scenarios of future climate, suggesting a limited safe operating space for these ecosystems under future warming.
Grants:	European Commission 610028
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Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Climate-change ecology ; Ecology ; Ecosystem ecology
Published in:	Nature ecology & evolution, Vol. 3, issue 5 (May 2019) , p. 772-779, ISSN 2397-334X

DOI: 10.1038/s41559-019-0838-x
PMID: 30858592

Postprint 35 p, 477.8 KB

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