DOI: 10.1111/gcb.12883
论文题名: Climate change and shrinking salamanders: Alternative mechanisms for changes in plethodontid salamander body size
作者: Connette G.M. ; Crawford J.A. ; Peterman W.E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 8 起始页码: 2834
结束页码: 2843
语种: 英语
英文关键词: Amphibian
; Declines
; Detection probability
; Growth
; Population dynamics
; Sampling bias
; Weather
Scopus关键词: amphibian
; body size
; climate change
; growth
; population dynamics
; sampling bias
; weather
; Amphibia
; Plethodontidae
; Salamandroidea
; rain
; anatomy and histology
; animal
; body size
; climate change
; female
; male
; North Carolina
; Urodela
; Animals
; Body Size
; Climate Change
; Female
; Male
; North Carolina
; Rain
; Urodela
英文摘要: An increasing number of studies have demonstrated relationships between climate trends and body size change of organisms. In many cases, climate might be expected to influence body size by altering thermoregulation, energetics or food availability. However, observed body size change can result from a variety of ecological processes (e.g. growth, selection, population dynamics) or imperfect observation of biological systems. We used two extensive datasets to evaluate alternative mechanisms for recently reported changes in the observed body size of plethodontid salamanders. We found that mean adult body size of salamanders can be highly sensitive to survey conditions, particularly rainfall. This systematic bias in the detection of larger or smaller individuals could result in a signature of body size change in relation to reported climate trends when it is simply observation error. We also identify considerable variability in body size distributions among years and find that individual growth rates can be strongly influenced by weather. Finally, our study demonstrates that measures of mean adult body size can be highly variable among surveys and that large sample sizes may be required to make reliable inferences. Identifying the effects of climate change is a critical area of research in ecology and conservation. Researchers should be aware that observed changes in certain organisms can result from multiple ecological processes or systematic bias due to nonrandom sampling of populations. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61693
Appears in Collections: 影响、适应和脆弱性
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作者单位: Division of Biological Sciences, University of Missouri, Columbia, MO, United States; National Great Rivers Research and Education Center, East Alton, IL, United States; Prairie Research Institute, Illinois Natural History Survey, University of Illinois, Champaign, IL, United States
Recommended Citation:
Connette G.M.,Crawford J.A.,Peterman W.E.. Climate change and shrinking salamanders: Alternative mechanisms for changes in plethodontid salamander body size[J]. Global Change Biology,2015-01-01,21(8)