globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13216
论文题名:
Morphological and dietary responses of chipmunks to a century of climate change
作者: Walsh R.E.; Aprígio Assis A.P.; Patton J.L.; Marroig G.; Dawson T.E.; Lacey E.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期:9
起始页码: 3233
结束页码: 3252
语种: 英语
英文关键词: chipmunks ; climate change ; morphometrics ; stable isotopes ; Tamias ; Yosemite
Scopus关键词: climate change ; climate effect ; cranium ; diet ; morphometry ; rodent ; stable isotope ; California ; United States ; Yosemite National Park ; Crania ; Tamias ; Tamias alpinus ; Tamias speciosus
英文摘要: Predicting how individual taxa will respond to climatic change is challenging, in part because the impacts of environmental conditions can vary markedly, even among closely related species. Studies of chipmunks (Tamias spp.) in Yosemite National Park provide an important opportunity to explore the reasons for this variation in response. While the alpine chipmunk (T. alpinus) has undergone a significant elevational range contraction over the past century, the congeneric and partially sympatric lodgepole chipmunk (T. speciosus) has not experienced an elevational range shift during this period. As a first step toward identifying the factors underlying this difference in response, we examined evidence for dietary changes and changes in cranial morphology in these species over the past century. Stable isotope analyses of fur samples from modern and historical museum specimens of these species collected at the same localities indicated that signatures of dietary change were more pronounced in T. alpinus, although diet breadth did not differ consistently between the study species. Morphometric analyses of crania from these specimens revealed significant changes in cranial shape for T. alpinus, with less pronounced changes in shape for T. speciosus; evidence of selection on skull morphology was detected for T. alpinus, but not for T. speciosus. These results are consistent with growing evidence that T. alpinus is generally more responsive to environmental change than T. speciosus, but emphasize the complex and often geographically variable nature of such responses. Accordingly, future studies that make use of the taxonomically and spatially integrative approach employed here may prove particularly informative regarding relationships between environmental conditions, range changes, and patterns of phenotypic variation. © 2016 John Wiley & Sons Ltd
资助项目: This work was supported by funds from the UC Berkeley Initiative in Global Change Biology (BIGCB), the Museum of Vertebrate Zoology, and Fundação de Amparo à Pesquisa de São Paulo – FAPESP (process number: 2010/52369-0). We thank the MVZ curators for making specimens available for our use, and we thank Lydia Smith of the MVZ's Evolutionary Genetics Lab for making laboratory space available to us. The staff of UC Berkeley's Center for Stable Isotope Biogeochemistry, in particular Stefania Mambelli, assisted with stable isotope analyses ; the preparation of isotopic samples was completed with the help of numerous undergraduate assistants. Maureen Lahiff provided guidance on statistical analyses, Miriam Zelditch provided valuable intellectual and logistical expertise, and Justin Brashares gave feedback on drafts of this manuscript.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61315
Appears in Collections:影响、适应和脆弱性

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作者单位: Museum of Vertebrate Zoology, University of California, Berkeley, CA, United States; Department of Integrative Biology, University of California, Berkeley, CA, United States; Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil

Recommended Citation:
Walsh R.E.,Aprígio Assis A.P.,Patton J.L.,et al. Morphological and dietary responses of chipmunks to a century of climate change[J]. Global Change Biology,2016-01-01,22(9)
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