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3 results for “ecogeographic gradient”
Datasets - Evolutionary history, not ecogeographic rules, explains size variation of tropical insects along elevational gradients
<p>One of the best-known biogeographic rules for ectotherms is the temperature-size rule, which asserts that ectotherms produce smaller adults at warmer temperatures. Although this is often true, it has become clear that there is no single process behind the pattern and many exceptions to the rule. To disentangle such complex temperature-size relationships, individual clades must be examined at ecological and evolutionary scales.</p> <p>We examined temperature-size relationships for 2106 individuals from 64 populations and 40 species of <i>Cephaloleia</i> rolled-leaf beetles (Chrysomelidae; Cassidinae)<b> </b>occurring along two tropical elevational gradientss: Barva and the Talamanca Cordillera in Costa Rica, Central America. We tested whether the temperature-size rule applied to interspecific elevational assemblages, intraspecific elevational populations, or different rearing temperatures for individual populations.</p> <p>At the interspecific scale, evolutionary history, rather than elevation, explains body size. At the intraspecific scale, only one of seven species followed the temperature-size rule across elevations. When larvae were reared at different temperatures, only one of five populations followed the temperature-size rule. Most populations grew to a fixed size regardless of temperature.</p> <p>Size in <i>Cephaloleia</i> beetles is constrained by their evolutionary history and responds to factors that rarely correlate with temperature. As temperature increases, ectotherms will not universally shrink, but determining if and why their size will change will require further investigation.</p> <p>Here we provide the following datasets used to determine effects of temperature on insect body size at population and community levels: <i>Supplement S1.</i> Body length for 2106 individuals representing 64 populations from 40 species of <i>Cephaloleia </i>rolled-leaf beetle along the Barva and Talamanca elevational gradients, Costa Rica<i>. Supplement S2.</i> Intraspecific differences in length for 798 individuals from seven <i>Cephaloleia </i>species present at multiple life zone<i>.</i><i> Supplement S3.</i> Effects of developmental temperatures on <i>Cephaloleia </i>adult size in 968 individuals from four species and five populations reared in the laboratory at temperatures between 10 and 35 °C.</p>
Datasets - Evolutionary history, not ecogeographic rules, explains size variation of tropical insects along elevational gradients
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Data from: Context-dependent evolution of ostracod morphology along the ecogeographical gradient of ocean depth
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