干旱区生态环境知识资源中心(Arid): Small mammal assemblage composition and habitat associations across an elevational gradient in southern California

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DOI	10.1093/jmammal/gyz178
	Small mammal assemblage composition and habitat associations across an elevational gradient in southern California
	Karasov-Olson, Aviv 1; Kelt, Douglas A.2
通讯作者	Karasov-Olson, Aviv
来源期刊	JOURNAL OF MAMMALOGY
ISSN	0022-2372
EISSN	1545-1542
出版年	2020
卷号	101 期号:1 页码:92-106
英文摘要	Elevational gradients coincide with expansive climatic gradients and diverse plant and animal communities. We evaluated the small mammal assemblages in eight distinct vegetation types across an elevational gradient in southern California, the Deep Canyon Transect, to determine how assemblage composition changes across the gradient and to identify species with similar habitat associations. Livetrapping efforts (4,800 trap-nights) yielded 1,097 captures of 713 individuals, representing 14 heteromyid and cricetid species. Heteromyids dominated the six lower-elevation vegetation types (< 1,300 m a.s.l.), whereas cricetids dominated the upper end of the gradient. Richness and diversity exhibited bimodal responses to elevation, which do not conform to mid-domain effect null predictions. Canonical correspondence analysis revealed that 75% of the variation in small mammal abundances was explainable by habitat characteristics, and cluster analysis grouped small mammals into three ecologically distinct groups based on their habitat associations. One contained only Chaetodipus penicillatus, while the others were comprised of low- and high-elevation species, respectively. The low-elevation species exhibit unusual levels of sympatry (and syntopy) among closely related species of pocket mice (Chaetodipus). Further efforts should investigate the mechanisms of coexistence for Chaetodipus species with nearly identical associations and seasonal effects on richness and diversity. Repeated surveys of entire gradients such as the Deep Canyon Transect will help refine our understanding of temporal dynamics of community assemblage and diversity.
英文关键词	Colorado Desert diversity elevational gradient habitat association small mammal assemblages Sonoran Desert species richness
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000518554900011
WOS关键词	ANT SPECIES RICHNESS ; DESERT RODENTS ; GLOBAL ANALYSIS ; SPATIAL SCALE ; BODY-SIZE ; PATTERNS ; COMMUNITY ; DIVERSITY ; EXTRAPOLATION ; RAREFACTION
WOS类目	Zoology
WOS研究方向	Zoology
来源机构	University of California, Davis
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315027
作者单位	1.Univ Calif Davis, Dept Environm Sci & Policy, Davis, CA 95616 USA; 2.Univ Calif Davis, Dept Wildlife Fish & Conservat Biol, Davis, CA 95616 USA
推荐引用方式 GB/T 7714	Karasov-Olson, Aviv,Kelt, Douglas A.. Small mammal assemblage composition and habitat associations across an elevational gradient in southern California[J]. University of California, Davis,2020,101(1):92-106.
APA	Karasov-Olson, Aviv,&Kelt, Douglas A..(2020).Small mammal assemblage composition and habitat associations across an elevational gradient in southern California.JOURNAL OF MAMMALOGY,101(1),92-106.
MLA	Karasov-Olson, Aviv,et al."Small mammal assemblage composition and habitat associations across an elevational gradient in southern California".JOURNAL OF MAMMALOGY 101.1(2020):92-106.