干旱区生态环境知识资源中心(Arid): Spatio-Temporal Dynamics of Aboveground Biomass in China's Oasis Grasslands Between 1989 and 2021

Arid

DOI	10.1029/2023EF003944
	Spatio-Temporal Dynamics of Aboveground Biomass in China's Oasis Grasslands Between 1989 and 2021
	Chen, Peng; Wang, Shuai; Liu, Yanxu; Wang, Yijia; Song, Jiaxi; Tang, Qiang; Yao, Ying; Wang, Yaping; Wu, Xutong; Wei, Fangli; Feng, Siyuan
通讯作者	Wang, S
来源期刊	EARTHS FUTURE
EISSN	2328-4277
出版年	2024
卷号	12 期号:3
英文摘要	Grassland provides multiple ecosystem services and plays a key role in preventing desert encroachment and maintaining oasis stability. In China, the area of cropland in oases has expanded significantly in recent decades, which results in a rapid increase in agricultural water demand and encroachment on grassland subsistence space. However, our knowledge about how the expansion of cropland affects oasis grasslands remains limited. We used machine learning, temporal segmentation of spectral trajectories, and maximum covariance analysis to generate an annual oasis grassland aboveground biomass (AGB) data set at 30-m resolution from 1989 to 2021 based on multiple remotely sensed and ground observation data sets, and investigated the dynamics of grassland AGB under cropland expansion in oases. We found that overall oasis grassland AGB increased significantly (0.3 gm(-2) yr(-1), P < 0.01) during 1989-2021, but trends in AGB were not consistent across basins. In the Yellow River, Turpan Hami, Qaidam, and southern Altai Mountains River Basins, AGB was dominated by a significant increase. Conversely, in all basins in southern Xinjiang, AGB showed a decreasing trend due to the rapid cropland expansion. Spatially, cropland expansion and AGB dynamics were strongly coupled. In regions characterized by agricultural concentration, grassland AGB benefitted from resource spillover via edge effects. However, in downstream areas or those with a low proportion of cropland, where most grasslands are distributed, the relationship between the two shifted to a trade-off. Our study provides a scientific basis for identifying priority areas for ecological restoration and for science-based planning of the scale of cropland in oases.
英文关键词	oasis aboveground biomass grassland cropland expansion drylands
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:001186405600001
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403327
推荐引用方式 GB/T 7714	Chen, Peng,Wang, Shuai,Liu, Yanxu,et al. Spatio-Temporal Dynamics of Aboveground Biomass in China's Oasis Grasslands Between 1989 and 2021[J],2024,12(3).
APA	Chen, Peng.,Wang, Shuai.,Liu, Yanxu.,Wang, Yijia.,Song, Jiaxi.,...&Feng, Siyuan.(2024).Spatio-Temporal Dynamics of Aboveground Biomass in China's Oasis Grasslands Between 1989 and 2021.EARTHS FUTURE,12(3).
MLA	Chen, Peng,et al."Spatio-Temporal Dynamics of Aboveground Biomass in China's Oasis Grasslands Between 1989 and 2021".EARTHS FUTURE 12.3(2024).