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Permafrost and drought regulate vulnerability of Tibetan Plateau grasslands to warming

Authors: Julia A. Klein; Ahui Peng; Genxu Wang; Ji Chen; Ji Chen; Kelly A. Hopping; Yan Yang; +1 Authors

Permafrost and drought regulate vulnerability of Tibetan Plateau grasslands to warming

Abstract

AbstractThe Tibetan Plateau has the largest expanse of high‐elevation permafrost in the world, and it is experiencing climate warming that may jeopardize the functioning of its alpine ecosystems. Many studies have focused on the effects of climate warming on vegetation production and diversity on the Plateau, but their disparate results have hindered a comprehensive, regional understanding. From a synthesis of twelve warming experiments across the Plateau, we found that warming increased aboveground net primary production (ANPP) and vegetation height at sites with permafrost, but ANPP decreased with warming at non‐permafrost sites. Aboveground net primary production responded more negatively to warming under drier conditions, due to both annual drought conditions and warming‐induced soil moisture loss. Decreases in species diversity with warming were also larger at sites with permafrost. These results support the emerging understanding that water plays a central role in the functioning of cold environments and suggest that as ecosystems cross a threshold from permafrost to non‐permafrost systems, ANPP will decrease across a greater proportion of the Tibetan Plateau. This study also highlights the future convergence of challenges from permafrost degradation and grassland desertification, requiring new collaborations among these currently distinct research and stakeholder groups.

Country
China (People's Republic of)
Related Organizations
Keywords

550, Climate Change, Permafrost, Environmental Sciences & Ecology, alpine grasslands, diversity, Synthesis, Alpine Grasslands, Mountains, ALPINE MEADOW, NET PRIMARY PRODUCTION, Aboveground Net Primary Production (Anpp), Tibetan Plateau, Water Availability, SPECIES COMPOSITION, Desertification, QH540-549.5, SOIL ORGANIC-CARBON, Diversity, Science & Technology, CLIMATE-CHANGE, Ecology, GLOBAL ASSESSMENT, Production, 500, mountains, desertification, TUNDRA, aboveground net primary production (ANPP), climate change, PRECIPITATION, Life Sciences & Biomedicine, Plant Height, PRIMARY PRODUCTIVITY, RESPONSES

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    61
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    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 1%
    influence
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
61
Top 1%
Top 10%
Top 1%
gold