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- W3018325979 abstract "Anthropogenic climate change is influencing the ecology and distribution of animals. The American pika (Ochotona princeps (Richardson, 1828)) is considered a model species for studying the effects of climate on small alpine mammals and has experienced local extirpation across its range. Using stable isotope analysis of two seasonal molts and bone collagen, we characterize the isotopic carbon and nitrogen niche of pika populations across their range and through time. We find pika isotopic diet to be stable across both time and space compared with other animals and considering the geographic and environmental extent of their range. We find that climatic, not geographic, factors explain part of the isotopic variation across their range. Both δ 13 C and δ 15 N from the fall-onset molt decrease with relative humidity of the environment and δ 15 N values from bone collagen increase with temperature and precipitation. We find a small but significant seasonal difference in δ 13 C, which could be explained by microbial enrichment of cached haypiles. We establish a baseline of pika isotopic diet and patterns related to climate across their range. We conclude that differences in isotopic signature between pika populations likely reflect the physiology of their forage plants in different environmental conditions." @default.
- W3018325979 created "2020-05-01" @default.
- W3018325979 creator A5023628883 @default.
- W3018325979 creator A5047607232 @default.
- W3018325979 creator A5081847205 @default.
- W3018325979 creator A5083467020 @default.
- W3018325979 date "2020-08-01" @default.
- W3018325979 modified "2023-10-18" @default.
- W3018325979 title "Isotopic niche of the American pika (<i>Ochotona princeps</i>) through space and time" @default.
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