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The Journal of animal ecology v.86 no.2, 2017년, pp.405 - 413   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Isotopic niches support the resource breadth hypothesis

Rader, Jonathan A. (Department of Zoology and Physiology, University of Wyoming, Laramie, WY, 82071, USA ) ; Newsome, Seth D. (Department of Biology, University of New Mexico, Albuquerque, NM, 87131, USA ) ; Sabat, Pablo (Departamento de Ciencias Ecologicas, Universidad de Chile, Santiago, Chile ) ; Chesser, R. Terry (USGS Patuxent Wildlife Research Center, National Museum of Natural History, Smithsonian Institution, Washington, DC, 20013, USA ) ; Dillon, Michael E. (Department of Zoology and Physiology, University of Wyoming, Laramie, WY, 82071, USA ) ; Martínez del Rio, Carlos (Department of Zoology and Physiology, University of Wyoming, Laramie, WY, 82071, USA ) ; Jackson, Andrew ;
  • 초록  

    Summary Because a broad spectrum of resource use allows species to persist in a wide range of habitat types, and thus permits them to occupy large geographical areas, and because broadly distributed species have access to more diverse resource bases, the resource breadth hypothesis posits that the diversity of resources used by organisms should be positively related with the extent of their geographic ranges.We investigated isotopic niche width in a small radiation of South American birds in the genus Cinclodes . We analysed feathers of 12 species of Cinclodes to test the isotopic version of the resource breadth hypothesis and to examine the correlation between isotopic niche breadth and morphology.We found a positive correlation between the widths of hydrogen and oxygen isotopic niches (which estimate breadth of elevational range) and widths of the carbon and nitrogen isotopic niches (which estimates the diversity of resources consumed, and hence of habitats used). We also found a positive correlation between broad isotopic niches and wing morphology.Our study not only supports the resource breadth hypothesis but it also highlights the usefulness of stable isotope analyses as tools in the exploration of ecological niches. It is an example of a macroecological application of stable isotopes. It also illustrates the importance of scientific collections in ecological studies.


  • 주제어

    Cinclodes .   Furnariidae .   isotopic niche .   niche evolution .   resource breadth hypothesis .   stable isotope analysis.  

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