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Temperature Predicts Relative Mass but Not Size in Passerines
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DOI：10.1111/geb.70272.png)
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Abstract
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Predictable relationships between temperature and animal size and shape are the basis for classic rules in macroecology. Body size is thought to covary negatively with temperature (Bergmann's Rule), broadly attributed to thermoregulatory demand for larger size in colder climates. However, ecophysiological principles suggest that changes in insulative materials may be a more effective thermoregulatory adaptation than changes in overall skeletal size. We test for global gradients in mass relative to skeletal size (a proxy for insulation) and body size.
Keywords:
Bergmann's Rule
biogeography
global change
macroecology
morphology
thermal physiology
thermoregulation
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