Mapping the global distribution of C4 vegetation using observations and optimality theory
Mapping the global distribution of C4 vegetation using observations and optimality theory
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使用观测和最优理论绘制 C4 植被的全球分布图
DOI:
10.1038/s41467-024-45606-3
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发表时间:
2024
影响因子:
16.6
通讯作者:
Still, Christopher J.
中科院分区:
文献类型:
--
作者:
Luo, Xiangzhong;Zhou, Haoran;Satriawan, Tin W.;Tian, Jiaqi;Zhao, Ruiying;Keenan, Trevor F.;Griffith, Daniel M.;Sitch, Stephen;Smith, Nicholas G.;Still, Christopher J.
Plants with the C4photosynthesis pathway typically respond to climate change differently from more common C3-type plants, due to their distinct anatomical and biochemical characteristics. These different responses are expected to drive changes in global C4and C3vegetation distributions. However, current C4vegetation distribution models may not predict this response as they do not capture multiple interacting factors and often lack observational constraints. Here, we used global observations of plant photosynthetic pathways, satellite remote sensing, and photosynthetic optimality theory to produce an observation-constrained global map of C4vegetation. We find that global C4vegetation coverage decreased from 17.7% to 17.1% of the land surface during 2001 to 2019. This was the net result of a reduction in C4natural grass cover due to elevated CO2favoring C3-type photosynthesis, and an increase in C4crop cover, mainly from corn (maize) expansion. Using an emergent constraint approach, we estimated that C4vegetation contributed 19.5% of global photosynthetic carbon assimilation, a value within the range of previous estimates (18–23%) but higher than the ensemble mean of dynamic global vegetation models (14 ± 13%; mean ± one standard deviation). Our study sheds insight on the critical and underappreciated role of C4plants in the contemporary global carbon cycle.
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影响因子:
4.3
作者:
R. Sage;Stefanie Sultmanis
通讯作者:
Stefanie Sultmanis
影响因子:
8.8
作者:
Edwards, Erika J.;Still, Christopher J.
通讯作者:
Still, Christopher J.
影响因子:
11.2
作者:
K. Toderich;C. Black;E. Juylova;O. Kozan;T. Mukimov;N. Matsuo
通讯作者:
N. Matsuo
影响因子:
11.4
作者:
Chini, Louise;Hurtt, George;Poulter, Benjamin
通讯作者:
Poulter, Benjamin
DOI:
10.1073/pnas.1922030117
发表时间:
2020-09-08
影响因子:
11.1
作者:
Knapp, Alan K.;Chen, Anping;Smith, Melinda D.
通讯作者:
Smith, Melinda D.