Trophic niche divergence reduces survival in an omnivorous rodent

Pei Jen L. Shaner*, Sheng Hai Wu, Linhua Ke, Shuh Ji Kao


研究成果: 雜誌貢獻期刊論文同行評審

9 引文 斯高帕斯(Scopus)


Hypothesis: Individuals that diverge from their population's mean trophic niche suffer reduced survival. Organism: The Taiwan field mouse, Apodemus semotus, a common, small, omnivorous rodent. Field site: Pinus-Alnus-Quercus forest in central Taiwan (121°18E, 24°21N). Methods: We used capture-recapture data to measure the survival of individual Apodemus semotus. We measured individual trophic niches using stable carbon and nitrogen isotope values obtained from samples of the rodents' hair. We used stepwise logistic regression to evaluate whether an individual's survival depended on the divergence of its trophic niche from the population mean. We controlled for the potentially confounding effects of resource abundance with dry weights of seeds and arthropods collected in seed traps and pitfall traps. Conclusions: The probability of survival declined with increasing niche divergence from the population mean. Stabilizing selection in this population of Apodemus semotus is thus acting to conserve niche width and location.

頁(從 - 到)933-946
期刊Evolutionary Ecology Research
出版狀態已發佈 - 2013 11月

ASJC Scopus subject areas

  • 生態學、進化論、行為學與系統學


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