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- W2767948154 startingPage "1670" @default.
- W2767948154 abstract "Abstract Aim The stratification of organisms along elevational gradients is widely reported, with montane communities characterized by species occurring in relatively small and isolated populations; these species are of considerable interest to ecologists and conservationists. This stratification is generally attributed to climatic zonation. Evidence that species are shifting upward in elevation has fuelled speculation that species are tracking their climatic niches in response to climate change. Uncertainty regarding the degree to which climate directly influences species abundance versus the degree to which climate has an indirect influence via vegetation represents a key impediment to understanding the ecology of montane species; here, we evaluate these direct and indirect effects. Location White Mountains, New Hampshire, USA. Methods We used N‐mixture models to correct for imperfect detection of species, principal component analysis to represent gradients in vegetation structure and composition and structural equation models to assign variation to the direct and indirect effects of climate upon birds. Results Analysis of 13 species revealed that climate exerts direct influences on bird abundance and indirect influences mediated by vegetation composition and structure. All species exhibited indirect effects of climate via forest habitat, with 77% exhibiting both direct and indirect effects and 53% exhibiting stronger indirect effects. Main conclusions We provide insight into the mechanistic pathways of how climate influences the distribution of species along elevational gradients, underscoring the complex vulnerability of species to climate change. Our results reveal that the majority of species experience both direct and indirect effects of climate, implying that forests play a key role in mediating climate effects. For species that are primarily influenced by climate directly, typical climate envelope models may continue to be informative, but for the majority of the species included in this study, we show that distribution models should also include measures of habitat." @default.
- W2767948154 created "2017-11-17" @default.
- W2767948154 creator A5036822400 @default.
- W2767948154 creator A5052427448 @default.
- W2767948154 creator A5084281477 @default.
- W2767948154 date "2019-07-25" @default.
- W2767948154 modified "2023-10-01" @default.
- W2767948154 title "Direct and indirect effects of climate on bird abundance along elevation gradients in the Northern Appalachian mountains" @default.
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- W2767948154 doi "https://doi.org/10.1111/ddi.12968" @default.