干旱区生态环境知识资源中心(Arid): Multiple Ecological Drivers Determining Vegetation Attributes across Scales in a Mountainous Dry Valley, Southwest China

Arid

DOI	10.3390/f11111140
	Multiple Ecological Drivers Determining Vegetation Attributes across Scales in a Mountainous Dry Valley, Southwest China
	Yang, Jie; El-Kassaby, Yousry A.; Guan, Wenbin
通讯作者	Guan, WB
来源期刊	FORESTS
EISSN	1999-4907
出版年	2020
卷号	11 期号:11
英文摘要	Identifying the ecological processes determining spatial variation in community composition and structure is a central issue in arid areas, especially in the face of climate change. This study aims to estimate how environmental and spatial processes jointly determine vegetation attributes across scales in the Min dry valley, one of the dry valleys in Hengduan Mountainous region suffering severe ecological degradation. A total of 48 plots along slope transects were investigated at three sites along the dry valley, with vegetation and environmental information gathered. Distance-based Moran's eigenvector maps (dbMEM) was used to extract local spatial variables, while geographic coordinates were used as regional spatial variables. We used redundancy analysis (RDA) and variation partitioning to detect the relative importance of environmental and spatial processes in influencing community composition and vegetation structure (including biomass, coverage, height, density, alpha and beta diversity), and to identify the most determinant environmental variables at different spatial scales. Results showed that both environmental and spatial processes accounted for significant and comparable variations in both vegetation composition and structure. Local spatial variables provided significant and comparable contribution as regional spatial variables to vegetation composition, while provided more contribution than regional spatial variables to vegetation structure. Topography had an overriding effect relative to soil on both vegetation composition and structure. Multi-scale analyses showed elevation was the most important variable (associated with soil moisture and nutrient) at the regional scale; while microtopography, especially slope aspect and shape, dominated at the local scale. We also demonstrated how vegetation composition and structure varied along environmental gradients. The study revealed the overriding role of topography in determining vegetation attributes in this mountainous dry valley, highlighting the advantage of multi-scale spatial analysis for better understanding spatial variation in vegetation pattern and with their important implications for biodiversity conservation and ecological management in the arid mountain areas.
英文关键词	community composition vegetation structure topography spatial scale mountainous arid areas
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:000594023900001
WOS关键词	BETA-DIVERSITY ; SPECIES COMPOSITION ; SOIL PROPERTIES ; RIVER VALLEY ; SLOPE ASPECT ; ENVIRONMENTAL-FACTORS ; SPATIAL PROCESSES ; TROPICAL FORESTS ; TREE DIVERSITY ; NEUTRAL THEORY
WOS类目	Forestry
WOS研究方向	Forestry
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327751
作者单位	[Yang, Jie; Guan, Wenbin] Beijing Forestry Univ, Sch Ecol & Nat Conservat, Beijing 100083, Peoples R China; [El-Kassaby, Yousry A.] Univ British Columbia, Dept Forest & Conservat Sci, Fac Forestry, Vancouver, BC V6T 1Z4, Canada
推荐引用方式 GB/T 7714	Yang, Jie,El-Kassaby, Yousry A.,Guan, Wenbin. Multiple Ecological Drivers Determining Vegetation Attributes across Scales in a Mountainous Dry Valley, Southwest China[J]. 北京林业大学,2020,11(11).
APA	Yang, Jie,El-Kassaby, Yousry A.,&Guan, Wenbin.(2020).Multiple Ecological Drivers Determining Vegetation Attributes across Scales in a Mountainous Dry Valley, Southwest China.FORESTS,11(11).
MLA	Yang, Jie,et al."Multiple Ecological Drivers Determining Vegetation Attributes across Scales in a Mountainous Dry Valley, Southwest China".FORESTS 11.11(2020).