DOI: 10.1002/ajb2.1376
论文题名: Community turnover by composition and climatic affinity across scales in an alpine system
作者: Smithers B.V. ; Oldfather M.F. ; Koontz M.J. ; Bishop J. ; Bishop C. ; Nachlinger J. ; Sheth S.N.
刊名: American Journal of Botany
ISSN: 29122
出版年: 2020
卷: 107, 期: 2 语种: 英语
英文关键词: alpine ecology
; beta diversity
; climatic niche mean
; community assembly
; elevation gradient
; Global Observation Research Initiative in Alpine Environments
; GLORIA
; Great Basin
; species turnover
; White Mountains
Scopus关键词: alpine environment
; climate change
; community composition
; microclimate
; plant community
; turnover
; United States
; White Mountains [California-Nevada]
; article
; California
; climate change
; habitat
; microclimate
; plant community
; prediction
; turnover rate
英文摘要: Premise: Examining community turnover across climate gradients at multiple scales is vital to understanding biogeographic response to climate change. This approach is especially important for alpine plants in which the relative roles of topographic complexity and nonclimatic or stochastic factors vary across spatial scales. Methods: We examined the structure of alpine plant communities across elevation gradients in the White Mountains, California. Using community climatic niche means (CCNMs) and measures of community dissimilarity, we explored the relation between community composition and elevation gradients at three scales: the mountain range, individual peaks, and within elevation contours. Results: At the mountain range scale, community turnover and CCNMs showed strongly significant relations with elevation, with an increase in the abundance of cooler and wetter-adapted species at higher elevations. At the scale of single peaks, we found weak and inconsistent relations between CCNMs and elevation, but variation in community composition explained by elevation increased. Within the elevation contours, the range of CCNMs was weakly positively correlated with turnover in species identity, likely driven by microclimate and other site-specific factors. Conclusions: Our results suggest that there is strong environmental sorting of alpine plant communities at broad scales, but microclimatic and site-specific, nonclimatic factors together shape community turnover at finer scales. In the context of climate change, our results imply that community–climate relations are scale-dependent, and predictions of local alpine plant range shifts are limited by a lack of topoclimatic and habitat information. © 2019 Botanical Society of America Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159694
Appears in Collections: 气候变化与战略
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作者单位: Gloria Great Basin, Oroville, CA, United States; Department of Ecology, Montana State University, Bozeman, MT, United States; Department of Plant Sciences, University of California, Davis, CA, United States; Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, United States; Earth Lab, University of Colorado, Boulder, CO, United States; Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States
Recommended Citation:
Smithers B.V.,Oldfather M.F.,Koontz M.J.,et al. Community turnover by composition and climatic affinity across scales in an alpine system[J]. American Journal of Botany,2020-01-01,107(2)