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原文連結
論文資訊
- 類型：已發表論文
- 日期：2025-07-07
摘要
城市 environments are often associated with resource and environmental differences providing potential novel selection pressures compared to adjacent unmodified landscapes. While these characteristics (e.g., heat islands, reduced vegetation) can contribute to differences in certain behaviors, morphology, or physiological traits, there is mixed evidence on how and to what extent 族群s are responding. In this study, we compared the feather morphology of Dark-eyed Junco (Junco hyemalis) 族群s established across an 城市ization gradient. We examined whether differential temperature regimes, related to 城市ization, correspond with significant variations to the proportion of down. We sampled ventral and dorsal feathers from 256 individuals throughout central and southern California at varying degrees of 城市
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