Influence of altitude, habitat and microhabitat on thermal adaptation of cicadas from Southwest Texas (Hemiptera: Cicadidae) |
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Authors: | Allen F Sanborn Polly K Phillips James E Heath Maxine S Heath |
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Institution: | aDepartment of Biology, Barry University, 11300 NE Second Avenue, Miami Shores, FL 33161-6695, USA;b17446 SW 33rd Court, Miramar, FL 33029, USA;cDepartment of Physiology, University of Illinois, 524 Burrill Hall, 407 S. Goodwin Avenue, Urbana, IL 61801, USA |
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Abstract: | The thermal responses of 12 cicada species inhabiting Big Bend National Park, Texas, USA are investigated to determine the influence of altitude, habitat and microhabitat. The park provides an opportunity to analyze the thermal responses in animals from a variety of habitats and altitudinal gradients within a limited geographic range. The data suggest that thermal responses of cicadas are adaptations to their specific habitats. No thermal responses are significantly correlated with body size. The maximum voluntary tolerance temperature (an upper behavioral thermoregulatory point) and heat torpor temperatures show significant correlations with altitude. Variability in thermal responses can also be related to the characteristics of the microhabitat selected or the behavioral pattern of a species. |
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Keywords: | Thermal adaptation Thermal response Cicada Big Bend |
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