2015
DOI: 10.1111/gcb.12883
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Climate change and shrinking salamanders: alternative mechanisms for changes in plethodontid salamander body size

Abstract: An increasing number of studies have demonstrated correlations between climate trendsand body size change of organisms. In many cases, climate might be expected to influence body size by altering thermoregulation, energetics or food availability. However, observed body size changes can result from a variety of ecological processes (e.g., growth, selection, population dynamics), yet may also be due to imperfect observation. We used two extensive datasets to evaluate alternative hypotheses for recently reported … Show more

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Cited by 53 publications
(47 citation statements)
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“…Higher metabolisms at higher temperatures predict that ectotherms should add less mass at elevated temperatures provided similar food resources Figure 1 Mean change in body condition (a), snout-vent length (SVL; b) and mass (c) of Desmognathus abditus in response to temperature and competition treatments. Overall, these data support conclusions that size and growth are plastic and conditional on local climates (Connette et al, 2015;Peterman et al, 2016). Displayed error bars represent AE1 standard error.…”
Section: Discussionsupporting
confidence: 75%
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“…Higher metabolisms at higher temperatures predict that ectotherms should add less mass at elevated temperatures provided similar food resources Figure 1 Mean change in body condition (a), snout-vent length (SVL; b) and mass (c) of Desmognathus abditus in response to temperature and competition treatments. Overall, these data support conclusions that size and growth are plastic and conditional on local climates (Connette et al, 2015;Peterman et al, 2016). Displayed error bars represent AE1 standard error.…”
Section: Discussionsupporting
confidence: 75%
“…As predicted for smaller ectotherms (Daufresne et al, 2009;Ohlberger, 2013), D. abditus increased body condition more at elevated temperatures than current temperatures in intraspecific treatments though we caution that this conclusion depends on whether researchers compare body condition (present study), length or mass. Similarly for terrestrial salamanders, a recent field study found that distributions and genetic contributions of a lower elevation species are expanding, while the distribution of the previously competitively superior high elevation species is contracting (Walls, 2009; but see Connette et al, 2015). However, the effects of temperature in interspecific treatments were minimized.…”
Section: Discussionmentioning
confidence: 99%
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“…While salamanders are able to find and take advantage of moist microhabitats in seemingly unfavorable habitats (e.g., Yanev & Wake, ); reductions in rainfall can eventually have negative consequences on salamander fitness. Reduced rainfall can limit surface activity (Connette et al, ), and dehydration can cause a decline in locomotor performance (Feder & Londos, ), both of which can reduce foraging success or opportunities, which would decrease energy intake and likely result in lower survival.…”
Section: Discussionmentioning
confidence: 99%
“…To investigate temporal partitioning of activity across DOY, we used normal mixture models Connette et al, 2014;Owen-Smith et al, 2012). These models allowed us to parse out periods of activity during the active season for desert tortoises, and compare them between sexes.…”
Section: Mixture Modelsmentioning
confidence: 99%