气候变化领域集成服务门户(CCPortal): Interactive response and spatial heterogeneity of alpine grassland biodiversity to soil, topography, climate, and human factors on the Qinghai-Tibet Plateau

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DOI	10.1002/ldr.4735
	Interactive response and spatial heterogeneity of alpine grassland biodiversity to soil, topography, climate, and human factors on the Qinghai-Tibet Plateau
	Sun, Yongxiu; Liu, Shiliang; Liu, Chao; Sun, Jian; Liu, Yixuan; Wang, Fangfang
发表日期	2023
ISSN	1085-3278
EISSN	1099-145X
起始页码	4488
结束页码	4502
卷号	34 期号:15
英文摘要	The alpine grassland ecosystem is a critical part of the Qinghai-Tibet Plateau (QTP), mainly including alpine meadows and alpine steppes. However, the influence factors of alpine grassland biodiversity are not clear for different alpine grassland types. In this study, pathway analysis was applied to explore the influences of soil, topography, climate, and human factors on alpine grassland biodiversity. Then, by using the geographically weighted regression (GWR) model, the spatial sensitivity response of alpine grassland biodiversity to soil, topography, climate, and human activities was revealed in different grassland types. The results were as follows: (1) The data and pathway analysis passed the validity and reliability analysis, indicating that the model fit of alpine grassland biodiversity was good for different grassland types. (2) For alpine meadows, the total effect coefficients of altitude, slope, and topographic wetness index (TWI) on normalized difference vegetation index (NDVI) (net primary productivity [NPP]) were 0.50, 0.21, and -0.48 (0.59, 0.17, and -0.41), respectively, suggesting that altitude had the strongest and positive effect on alpine meadow diversity. In addition, among human activity and climate variables, human activity intensity and precipitation exhibited significant effects on NDVI (NPP), with total effect coefficients of -0.17 and 0.61 (-0.19 and 0.63). The influence of soil, topography, climate, and human variables on alpine steppe diversity showed similarities with alpine meadow diversity. (3) Alpine grassland biodiversity was directly and indirectly influenced by multiple driving factors for different grassland types. The total coefficients of soil, topography, climate, and human factors on NDVI (NPP) were 0.41, 0.38, -0.21, and 0.71 (0.32, 0.50, -0.21, and 0.91), respectively, which indicated that alpine meadow diversity was mainly regulated by climate on the QTP, consistent with alpine steppe diversity. (4) For different grassland types, the spatial effects of various driving factors on alpine grassland biodiversity all showed significant spatial heterogeneity at the grid scale. Based on the knowledge about the driving mechanism and spatial response of alpine grassland biodiversity to its driving factors in different grassland types of the QTP, we aim to provide guidance for alpine grassland biodiversity conservation and rational ecosystem management.
关键词	alpine grassland biodiversity climate human activities Qinghai-Tibet Plateau pathway analysis
英文关键词	NET PRIMARY PRODUCTIVITY; BELOW-GROUND BIOMASS; VEGETATION DYNAMICS; DIVERSITY; CHINA; IMPACTS; TRAITS; NDVI
WOS研究方向	Environmental Sciences ; Soil Science
WOS记录号	WOS:001065477600002
来源期刊	LAND DEGRADATION & DEVELOPMENT
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/282640
作者单位	Yanan University; Beijing Normal University; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Beijing Normal University
推荐引用方式 GB/T 7714	Sun, Yongxiu,Liu, Shiliang,Liu, Chao,et al. Interactive response and spatial heterogeneity of alpine grassland biodiversity to soil, topography, climate, and human factors on the Qinghai-Tibet Plateau[J]. 中国科学院青藏高原研究所,2023,34(15).
APA	Sun, Yongxiu,Liu, Shiliang,Liu, Chao,Sun, Jian,Liu, Yixuan,&Wang, Fangfang.(2023).Interactive response and spatial heterogeneity of alpine grassland biodiversity to soil, topography, climate, and human factors on the Qinghai-Tibet Plateau.LAND DEGRADATION & DEVELOPMENT,34(15).
MLA	Sun, Yongxiu,et al."Interactive response and spatial heterogeneity of alpine grassland biodiversity to soil, topography, climate, and human factors on the Qinghai-Tibet Plateau".LAND DEGRADATION & DEVELOPMENT 34.15(2023).