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DOI10.1007/s11629-023-8299-8
Precipitation and anthropogenic activities regulate the changes of NDVI in Zhegucuo Valley on the southern Tibetan Plateau
Zhao, Wanglin; Wang, Hengying; Zhang, Huifang; Zhang, Lin
发表日期2024
ISSN1672-6316
EISSN1993-0321
起始页码21
结束页码2
卷号21期号:2
英文摘要Whether climate change or anthropogenic activities play a more pivotal role in regulating vegetation growth on the Tibetan Plateau is still controversial. A better understanding on grassland changes at a fine scale may provide important guidance for local government policy and grassland management. Using two of the most reliable satellite NDVI products (MODIS NDVI and SPOT NDVI), we evaluated the dynamic of grasslands in the Zhegucuo valley on the southern Tibetan Plateau from 2000 to 2020, and analyzed its driving factors and relative influences of climate change and anthropogenic activities. Here, the key indicators of climate change were assumed to be precipitation and temperature. The main results were: (1) the grassland NDVI in Zhegucuo valley did not reflect a significant temporal change during the last 21 years. The variation of precipitation during the early growing season (GSP) resembled that of NDVI, and the GSP was positively correlated with NDVI. At the pixel level, the partial correlation analysis showed that 37.79% of the pixels depicted a positive relationship between GSP and NDVI, while 11.32% of the pixels showed a negative relationship between temperature during the early growing season (GST) and NDVI. (2) In view of the spatial distribution, the areas mainly controlled by GSP were generally distributed in the southern part, while those affected by GST stood in the eastern part, mainly around the Zhegucuo lake where most population in Cuomei County settled down. (3) Decreasing NDVI trends were mainly occurred in alpine steppe at lower elevations rather than alpine meadow at higher elevations. (4) The residual trend (RESTREND) analysis further indicated that the anthropogenic activities played a more pivotal role in regulating the annual changes of NDVI rather than climate factors in this area. Future studies should pay more attention on climate extremes rather than the simple temporal trends. Also, the influence of human activities on alpine grassland needs to be accessed and fully considered in future sustainable management.
英文关键词Anthropogenic activities; Climate change; Precipitation; Fencing; Vegetation degradation
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:001173920000010
来源期刊JOURNAL OF MOUNTAIN SCIENCE
来源机构中国科学院青藏高原研究所
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/308275
作者单位Tibet University; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS
推荐引用方式
GB/T 7714
Zhao, Wanglin,Wang, Hengying,Zhang, Huifang,et al. Precipitation and anthropogenic activities regulate the changes of NDVI in Zhegucuo Valley on the southern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2024,21(2).
APA Zhao, Wanglin,Wang, Hengying,Zhang, Huifang,&Zhang, Lin.(2024).Precipitation and anthropogenic activities regulate the changes of NDVI in Zhegucuo Valley on the southern Tibetan Plateau.JOURNAL OF MOUNTAIN SCIENCE,21(2).
MLA Zhao, Wanglin,et al."Precipitation and anthropogenic activities regulate the changes of NDVI in Zhegucuo Valley on the southern Tibetan Plateau".JOURNAL OF MOUNTAIN SCIENCE 21.2(2024).
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