干旱区生态环境知识资源中心(Arid): The Relative Contributions of Climate and Grazing on the Dynamics of Grassland NPP and PUE on the Qinghai-Tibet Plateau

Arid

DOI	10.3390/rs13173424
	The Relative Contributions of Climate and Grazing on the Dynamics of Grassland NPP and PUE on the Qinghai-Tibet Plateau
	Yu, Huilin; Ding, Qiannan; Meng, Baoping; Lv, Yanyan; Liu, Chang; Zhang, Xinyu; Sun, Yi; Li, Meng; Yi, Shuhua
通讯作者	Li, M (corresponding author), Nantong Univ, Sch Geog Sci, Nantong 226007, Peoples R China.
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2021
卷号	13 期号:17
英文摘要	Net primary productivity (NPP) and precipitation-use efficiency (PUE) are crucial indicators in understanding the responses of vegetation to global change. However, the relative contributions of climate change and human interference to the dynamics of NPP and PUE remain unclear. During the past few decades, the impacts of climate change and human activities on alpine grasslands on the Qinghai-Tibet Plateau (QTP) have been intensifying. The aims of the study were to investigate the spatiotemporal patterns of grassland NPP and PUE on the QTP during 2000-2017 and quantify how much of the variance in NPP and PUE can be attributed to the climatic factors (precipitation and temperature) and grazing intensity. The results showed that: (1) grassland NPP significantly increased with a rate of 0.6 g C m(-2) year(-1) over the past 18 years, mainly induced by the increased temperature and the enhanced precipitation. The temperature was the dominant factor for NPP interannual variation in mid-eastern QTP, and precipitation restrained vegetation growth most in the southwest and northeast. (2) The PUE was higher on the eastern and western parts of the plateau, but lower at the center. Regarding grassland types, the PUE of alpine steppe (0.19 g C m(-2) mm(-1)) was significantly lower than those of alpine meadow (0.31 g C m(-2) mm(-1)) and desert steppe (0.32 g C m(-2) mm(-1)). (3) Precipitation was significantly and negatively correlated with PUE and contributed the most to the temporal variation of grassland PUE on the QTP (52.7%). (4) Furthermore, we found that the grazing activities had the lowest contributions to both NPP and PUE interannual variation, compared to temperature and precipitation. Thus, it is suggested that climate variability rather than grazing activities dominated vegetation changes on the QTP.
英文关键词	alpine grassland carbon and water cycles climate change human activities Tibetan Plateau
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000694582400001
WOS关键词	NET PRIMARY PRODUCTION ; PRECIPITATION-USE EFFICIENCY ; ALPINE GRASSLAND ; PRIMARY PRODUCTIVITY ; SPECIES-DIVERSITY ; TIME-SERIES ; VEGETATION ; PLANT ; TERRESTRIAL ; VARIABILITY
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364483
作者单位	[Yu, Huilin; Ding, Qiannan; Meng, Baoping; Lv, Yanyan; Liu, Chang; Zhang, Xinyu; Sun, Yi; Li, Meng; Yi, Shuhua] Nantong Univ, Sch Geog Sci, Nantong 226007, Peoples R China
推荐引用方式 GB/T 7714	Yu, Huilin,Ding, Qiannan,Meng, Baoping,et al. The Relative Contributions of Climate and Grazing on the Dynamics of Grassland NPP and PUE on the Qinghai-Tibet Plateau[J],2021,13(17).
APA	Yu, Huilin.,Ding, Qiannan.,Meng, Baoping.,Lv, Yanyan.,Liu, Chang.,...&Yi, Shuhua.(2021).The Relative Contributions of Climate and Grazing on the Dynamics of Grassland NPP and PUE on the Qinghai-Tibet Plateau.REMOTE SENSING,13(17).
MLA	Yu, Huilin,et al."The Relative Contributions of Climate and Grazing on the Dynamics of Grassland NPP and PUE on the Qinghai-Tibet Plateau".REMOTE SENSING 13.17(2021).