Morphological variations in a widely distributed Eastern Asian passerine cannot be consistently explained by ecogeographic rules

Chun Cheng Lee, Yuchen Fu, Chia fen Yeh, Carol K.L. Yeung, Hsin yi Hung, Chiou Ju Yao, Pei Jen Lee Shaner*, Shou Hsien Li

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Ecogeographic rules that describe quantitative relationships between morphologies and climate might help us predict how morphometrics of animals was shaped by local temperature or humidity. Although the ecogeographic rules had been widely tested in animals of Europe and North America, they had not been fully validated for species in regions that are less studied. Here, we investigate the morphometric variation of a widely distributed East Asian passerine, the vinous-throated parrotbill (Sinosuthora webbiana), to test whether its morphological variation conforms to the prediction of Bergmann's rule, Allen's rules, and Gloger's rule. We at first described the climatic niche of S. webbiana from occurrence records (n = 7838) and specimen records (n = 290). The results of analysis of covariance (ANCOVA) suggested that the plumage coloration of these parrotbills was darker in wetter/warmer environments following Gloger's rule. However, their appendage size (culmen length, beak volume, tarsi length) was larger in colder environments, the opposite of the predictions of Allen's rule. Similarly, their body size (wing length) was larger in warmer environments, the opposite of the predictions of Bergmann's rule. Such disconformity to both Bergmann's rule and Allen's rule suggests that the evolution of morphological variations is likely governed by multiple selection forces rather than dominated by thermoregulation. Our results suggest that these ecogeographic rules should be validated prior to forecasting biological responses to climate change especially for species in less-studied regions.

原文英語
頁(從 - 到)15249-15260
頁數12
期刊Ecology and Evolution
11
發行號21
DOIs
出版狀態已發佈 - 2021 十一月

ASJC Scopus subject areas

  • 生態學、進化論、行為學與系統學
  • 生態學
  • 自然與景觀保護

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