Macroecology and macroevolution of body size in Anolis lizards
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Data
2020-06
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Resumo
Body size is one of the most influential traits affecting many ecological and physiological
processes across animal and plant taxa. Studies of the environmental factors shaping
body size patterns may evaluate either temporal or spatial dimensions. Here, we
analyzed body size evolution in the radiation of Anolis lizards across both geographical
and temporal dimensions. We used a set of macroecological and macroevolutionary
methods to test current and past environmental effects on geographical gradients of
body size and its evolutionary rates. First, we test whether a set of current ecological/
physiological hypotheses (heat balance, productivity and seasonality) explains spatial
body size gradients. Second, we evaluate how tempo (i.e. evolutionary rates) and mode
(i.e. evolutionary process) of body size evolution changed through time and the role of
paleo-temperatures on rates of body size evolution during the Cenozoic. We did not
find a signature of current environmental variables driving spatial body size gradients.
By contrast, we found strong support for a correlation between temperature changes
(i.e. climate cooling) during the Cenozoic and rates of body size evolution (i.e. body
size diversification). We suggest that patterns of body size evolution in Anolis lizards
might be influenced by thermoregulatory behavior across clades and regions.
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Bergmann’s rule, Cenozoic, Ectotherms, Spatial gradients, Evolutionary rates, Heat balance
Citação
VELASCO, Julián A.; VILLALOBOS, Fabricio; DINIZ-FILHO, José A. F.; POE, Steven; FLORES-VILLELA, Oscar. Macroecology and macroevolution of body size in Anolis lizards. Ecography, Nova Jersey, v. 43, n. 6, p. 812-822, Jun. 2020.