Convergence in phosphorus constraints to photosynthesis in forests around the world.
Convergence in phosphorus constraints to photosynthesis in forests around the world.
复制标题
世界各地森林中磷对光合作用的限制趋同。
DOI:
10.1038/s41467-022-32545-0
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发表时间:
2022-08-25
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Tropical forests take up more carbon (C) from the atmosphere per annum by photosynthesis than any other type of vegetation. Phosphorus (P) limitations to C uptake are paramount for tropical and subtropical forests around the globe. Yet the generality of photosynthesis-P relationships underlying these limitations are in question, and hence are not represented well in terrestrial biosphere models. Here we demonstrate the dependence of photosynthesis and underlying processes on both leaf N and P concentrations. The regulation of photosynthetic capacity by P was similar across four continents. Implementing P constraints in the ORCHIDEE-CNP model, gross photosynthesis was reduced by 36% across the tropics and subtropics relative to traditional N constraints and unlimiting leaf P. Our results provide a quantitative relationship for the P dependence for photosynthesis for the front-end of global terrestrial C models that is consistent with canopy leaf measurements. Phosphorus (P) limitation is pervasive in tropical forests. Here the authors analyse the dependence of photosynthesis on leaf N and P in tropical forests, and show that incorporating leaf P constraints in a terrestrial biosphere model enhances its predictive power.
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影响因子:
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Ellsworth, David S.;Crous, Kristine Y.;Cooke, Julia
通讯作者:
Cooke, Julia
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Lloyd, Jon
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Papale, Dario
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Ringeval, Bruno
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通讯作者:
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