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Mitigating the negative effects of droughts on alpine grassland productivity in the northern Xizang Plateau via degradation-combating actions

文献类型：期刊论文

作者Yang, Yuting3; Wu, Jianshuang2; Niu, Ben1; Li, Meng3
刊名INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
出版日期2024-11-01
卷号134页码:10
关键词Alpine grassland Productivity Drought Human activities Sensitivity
ISSN号1569-8432
DOI10.1016/j.jag.2024.104171
产权排序3
英文摘要The Qinghai-Xizang Plateau, hosting the world's largest alpine pastures, plays a pivotal environmental role in Asia. These ecosystems face alterations driven by both climate change and anthropogenic activities, resulting in the widespread consideration of grassland degradation. From 2000 to 2020, the northern Xizang Plateau experienced a pronounced escalation in drought conditions, particularly following a management policy aimed at combating grassland degradation, via restricting livestock numbers and implementing fencing enclosures, initiated in 2009. Specially, following the enforcement of this policy (2010-2020), there was a substantial 13.5 % reduction in soil moisture levels compared to the pre-implementation period (2000-2009), accompanied by a 42.8 % increase in drought severity (measured by the Palmer Drought Severity Index, PDSI) and an 11.6 % rise in drought duration. Under these challenging drought conditions, we identified negative trends of potential grassland Net Primary Productivity (NPP) which in absence of anthropogenic influence, as simulated by terrestrial ecosystem model (TEM). Contrary to this simulation, satellite time series observations revealed a widespread increase in actual grassland productivity. Remarkably, despite the challenging drought conditions between 2010 and 2020, we observed a substantial increase of 4.8 % in actual NPP (measured by light use efficiency model), 2.7 % in Normalized Difference Vegetation Index (NDVI), 10 % in solar-induced chlorophyll fluorescence (SIF), and 7.95 % in Gross Primary Productivity (GPP), respectively. Much of this enhancement in grassland productivity occurred in areas where livestock populations had markedly declined. Notably, the percentage of NPP increase mainly caused by degradation-combating actions doubled from 24.8 % during 2000-2009 to 49.8 % during 2010-2020 across the northern Xizang Plateau. In conclusion, our findings highlight the potential of large-scale degradation-combating actions to mitigate the negative impacts of climate change and contribute to a greener Earth.
WOS关键词QINGHAI-TIBETAN PLATEAU ; GRAZING EXCLUSION ; VEGETATION GROWTH ; CLIMATE EXTREMES ; SPRING PHENOLOGY ; IMPACTS ; CHINA ; PRECIPITATION ; TEMPERATURE ; RANGELAND
资助项目National Nature Science Foundation of China[42301111] ; Strategic Pilot Science and Technology Project of the Chinese Academy of Sciences[XDA26050501]
WOS研究方向Remote Sensing
语种英语
WOS记录号WOS:001318158500001
出版者ELSEVIER
资助机构National Nature Science Foundation of China ; Strategic Pilot Science and Technology Project of the Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/208409]  
专题拉萨站高原生态系统研究中心_外文论文
通讯作者Li, Meng
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Lhasa Natl Ecol Res Stn, Beijing 100101, Peoples R China
2.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing, Peoples R China
3.Nantong Univ, Sch Geog Sci, Nantong 226007, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Yuting,Wu, Jianshuang,Niu, Ben,et al. Mitigating the negative effects of droughts on alpine grassland productivity in the northern Xizang Plateau via degradation-combating actions[J]. INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,2024,134:10.
APA Yang, Yuting,Wu, Jianshuang,Niu, Ben,&Li, Meng.(2024).Mitigating the negative effects of droughts on alpine grassland productivity in the northern Xizang Plateau via degradation-combating actions.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,134,10.
MLA Yang, Yuting,et al."Mitigating the negative effects of droughts on alpine grassland productivity in the northern Xizang Plateau via degradation-combating actions".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 134(2024):10.

入库方式： OAI收割

来源：地理科学与资源研究所

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