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Air temperature optima of vegetation productivity across global biomes

by Wang, Xuhui , Cescatti, Alessandro , Cuntz, Matthias , Shi, Xiaoying , Alkama, Ramdane , Yuan, Wenping , Verbeeck, Hans , Peñuelas, Josep , Myneni, Ranga B. , Wang, Tao , Gao, Mengdi , Liu, Yongwen , Ciais, Philippe , Wu, Jin , Janssens, Ivan A. , Niu, Shuli , He, Yue , Huang, Mengtian , Luo, Yiqi , Keenan, Trevor F. , Berry, Joseph A. , Peng, Shushi , De Deurwaerder, Hannes , Mao, Jiafu , Piao, Shilong , Wang, Kai

in 631/158 / 631/158/2165 / 631/158/2445 / 704/158 / Air temperature / BASIC BIOLOGICAL SCIENCES / Biological and Physical Anthropology / Biomedical and Life Sciences / Carbon Cycle / Climate / Covariance / Ecology / Ecosystem / Ecosystems / Evolutionary Biology / Forests / Life Sciences / Paleontology / Photosynthesis / Productivity / Satellite observation / Temperature / Tropical forests / Vegetation / Vortices / Zoology

2019

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2019

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2019

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Journal Article

Air temperature optima of vegetation productivity across global biomes

Wang, Xuhui,

Cescatti, Alessandro,

Cuntz, Matthias,

Shi, Xiaoying,

Alkama, Ramdane,

Yuan, Wenping,

Verbeeck, Hans,

Peñuelas, Josep,

Myneni, Ranga B.,

Wang, Tao,

Gao, Mengdi,

Liu, Yongwen,

Ciais, Philippe,

Wu, Jin,

Janssens, Ivan A.,

Niu, Shuli,

He, Yue,

Huang, Mengtian,

Luo, Yiqi,

Keenan, Trevor F.,

Berry, Joseph A.,

Peng, Shushi,

De Deurwaerder, Hannes,

Mao, Jiafu,

Piao, Shilong,

Wang, Kai

2019

Overview

The global distribution of the optimum air temperature for ecosystem-level gross primary productivity ( T opt 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 opt eco is consistently lower than the physiological optimum temperature of leaf-level photosynthetic capacity, which typically exceeds 30 °C. The global average T opt eco is estimated to be 23 ± 6 °C, with warmer regions having higher T opt eco values than colder regions. In tropical forests in particular, T opt 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. Combining eddy covariance measurements and satellite observations, the authors identify an optimum air temperature for global vegetation productivity and show that it is consistently lower than the optimum foliar photosynthetic capacity.

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Publisher

Nature Publishing Group UK,Nature Publishing Group,Nature

Subject

/ 704/158

/ BASIC BIOLOGICAL SCIENCES

/ Biological and Physical Anthropology