Mycorrhizal type regulates trade-offs between plant and soil carbon in forests

Kai Yang, Qian Zhang, Jiaojun Zhu (), Qiqi Wang, Tian Gao and G. Geoff Wang
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Kai Yang: Chinese Academy of Sciences
Qian Zhang: Chinese Academy of Sciences
Jiaojun Zhu: Chinese Academy of Sciences
Qiqi Wang: Chinese Academy of Sciences
Tian Gao: Chinese Academy of Sciences
G. Geoff Wang: Clemson University

Nature Climate Change, 2024, vol. 14, issue 1, 91-97

Abstract: Abstract Forest ecosystems store ~80% of the carbon in terrestrial ecosystems, but their long-term carbon sequestration depends partly on how plant biomass and soil carbon stocks will respond to global changes. Although the stimulation of plant growth by global change drivers has been widely observed, the response of soil carbon stock to global changes remains uncertain. Here we conducted a meta-analysis on experimental observations of plant and soil carbon-related data worldwide. We found that plant biomass and soil carbon stock increased more under elevated CO2 than under nitrogen deposition and warming. Under nitrogen deposition and warming, soil carbon stock depended on mycorrhizal associations, decreasing in forests dominated by arbuscular mycorrhizal tree species while increasing in forests dominated by ectomycorrhizal tree species. These results suggest a mycorrhizae-mediated trade-off between plant biomass and soil carbon sequestration in forest ecosystems under nitrogen deposition and warming conditions.

Date: 2024
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DOI: 10.1038/s41558-023-01864-5

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