干旱区生态环境知识资源中心(Arid): Spatial patch structure and adaptive strategy for desert shrub of Reaumuria soongorica in arid ecosystem of the Heihe River Basin

Arid

	Spatial patch structure and adaptive strategy for desert shrub of Reaumuria soongorica in arid ecosystem of the Heihe River Basin
	Li Wei; Li Xiaoyan; Huang Yongmei; Wang Pei; Zhang Cicheng
来源期刊	Journal of Geographical Sciences
ISSN	1009-637X
出版年	2019
卷号	29 期号:9 页码:1507-1526
英文摘要	In many arid ecosystems, vegetation frequently occurs in high-cover patches interspersed in a matrix of low plant cover. However, theoretical explanations for shrub patch pattern dynamics along climate gradients remain unclear on a large scale. This context aimed to assess the variance of the Reaumuria soongorica patch structure along the precipitation gradient and the factors that affect patch structure formation in the middle and lower Heihe River Basin (HRB). Field investigations on vegetation patterns and heterogeneity in soil properties were conducted during 2014 and 2015. The results showed that patch height, size and plant-to-patch distance were smaller in high precipitation habitats than in low precipitation sites. Climate, soil and vegetation explained 82.5% of the variance in patch structure. Spatially, R. soongorica shifted from a clumped to a random pattern on the landscape towards the MAP gradient, and heterogeneity in the surface soil properties (the ratio of biological soil crust (BSC) to bare gravels (BG)) determined the R. soongorica population distribution pattern in the middle and lower HRB. A conceptual model, which integrated water availability and plant facilitation and competition effects, was revealed that R. soongorica changed from a flexible water use strategy in high precipitation regions to a consistent water use strategy in low precipitation areas. Our study provides a comprehensive quantification of the variance in shrub patch structure along a precipitation gradient and may improve our understanding of vegetation pattern dynamics in the Gobi Desert under future climate change.
英文关键词	patch structure spatial pattern precipitation soil heterogeneity Reaumuria soongorica Heihe River Basin
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6544152
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336149
作者单位	Li Wei, Beijing Normal University;;School of Land Resources & Urban and Rural Planning, Hebei GEO University;;School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology;;;;, ;;Shijiazhuang;;, Beijing;;;;Beijing 100875;;050031;;100875.; Li Xiaoyan, Beijing Normal University;;School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology;;, ;;, Beijing;;Beijing 100875;;100875.; Huang Yongmei, Beijing Normal University;;School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology;;, ;;, Beijing;;Beijing 100875;;100875.; Wang Pei, Beijing Normal University;;School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology;;, ;;, Beij...
推荐引用方式 GB/T 7714	Li Wei,Li Xiaoyan,Huang Yongmei,et al. Spatial patch structure and adaptive strategy for desert shrub of Reaumuria soongorica in arid ecosystem of the Heihe River Basin[J],2019,29(9):1507-1526.
APA	Li Wei,Li Xiaoyan,Huang Yongmei,Wang Pei,&Zhang Cicheng.(2019).Spatial patch structure and adaptive strategy for desert shrub of Reaumuria soongorica in arid ecosystem of the Heihe River Basin.Journal of Geographical Sciences,29(9),1507-1526.
MLA	Li Wei,et al."Spatial patch structure and adaptive strategy for desert shrub of Reaumuria soongorica in arid ecosystem of the Heihe River Basin".Journal of Geographical Sciences 29.9(2019):1507-1526.