NDLI: Lifestyle-Based Approaches Provide Insights into Body Size Variation Across Environmental Gradients in Anurans

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Evolutionary Biology : Volume 43, Issue 1, March 2016

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Lifestyle-Based Approaches Provide Insights into Body Size Variation Across Environmental Gradients in Anurans

Content Provider	Springer Nature Link
Author	Guo, Cheng Lu, Xin
Copyright Year	2016
Abstract	Body size of organisms as a fitness-related phenotype has evolved in response to local conditions, often through the size-dependent thermoregulatory mechanisms. The direction and degree of this response should depend on animals’ lifestyle in terms of the preference for terrestrial or aquatic conditions, especially so for adult anurans that differ in lifestyle among species but all must maintain certain body temperatures for metabolism. It may be expected that anuran species frequently exposed to terrestrial environments characterized by fluctuant thermal conditions are more plastic in body size along thermal gradients than those highly relaying on aquatic environments where thermal conditions are relatively stable. We test this prediction using both interspecific and intraspecific data. With anurans in China as the model organisms, we show that across terrestrial species but not aquatic species, body size decreases with increasing ambient temperature. From the published literature worldwide, we summarized that more terrestrial versus fewer aquatic species follow the predicted ecogeographical size patterns. In addition, both interspecific and intraspecific data reveal that arboreal anurans do not exhibit the size cline, probably because relatively warm climates experienced by these species impose weak selective pressures on heat conservation or adaptation to tree-climbing constrains the variation in body size. Our finding highlights the importance of taking lifestyle into account when assessing macroevolutionary trends in body size for anurans in particular and ectothermic taxa in general.
Starting Page	208
Ending Page	214
Page Count	7
File Format	PDF
ISSN	00713260
Journal	Evolutionary Biology
Volume Number	43
Issue Number	2
e-ISSN	19342845
Language	English
Publisher	Springer US
Publisher Date	2016-01-19
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anurans Ecogeographical body size trend Heat conservation Interspecific comparison Lifestyle Evolutionary Biology Ecology Developmental Biology Human Genetics Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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