Zhou, Wenxin, Li, Changjia, Fu, Bojie et al. (3 more authors) (2024) Changes and drivers of vegetation productivity in China’s drylands under climate change. Environmental Research Letters. 114001. ISSN 1748-9326
Abstract
Increasing aridity can sharply reduce vegetation productivity in drylands, but elevated CO2 and warming can enhance vegetation growth. However, the extent to which these positive effects counteract the negative effects of heightened aridity on vegetation productivity remains uncertain. Here, we used space-for-time substitution to assess the responses of 15 ecosystem variables to aridity in China’s drylands and predicted vegetation productivity under future aridity, temperature, precipitation, nitrogen deposition, and CO2. The results showed that vegetation productivity decreased abruptly as aridity (1-precipitation/potential evapotranspiration) increased to the threshold of 0.7, which corresponds to the vegetation decline stage in the dryland ecosystem’s response to increasing aridity. Future projections suggest that 12.8% of China’s drylands will cross aridity thresholds (0.7, 0.8, and 0.95) by 2100, in which vegetation productivity will significantly increase by 40.0%. Elevated CO2 will stimulate vegetation growth, but continuously rising temperature and CO2 by 2100 will have adverse effects, particularly in regions with limited nitrogen and water. This study suggests that effective adaptation and mitigation actions should be developed for regions crossing aridity thresholds, to ensure that drylands maintain the capacity to provide essential ecosystem services required to support the increasing population.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Author(s). Published by IOP Publishing Ltd. |
Keywords: | driving factors,drylands,gross primary productivity,increasing aridity,non-linear response |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Environment and Geography (York) |
Depositing User: | Pure (York) |
Date Deposited: | 09 Oct 2024 11:10 |
Last Modified: | 01 Nov 2024 04:00 |
Published Version: | https://doi.org/10.1088/1748-9326/ad7a0e |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1088/1748-9326/ad7a0e |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:218134 |
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