Data from: Low temperatures impact species distributions of jumping spiders across a desert elevational cline
Brandt, Erin E.; Roberts, Kevin T.; Williams, Caroline M.; Elias, Damian O. (2020), Data from: Low temperatures impact species distributions of jumping spiders across a desert elevational cline, Dryad, Dataset, https://doi.org/10.6078/D1X98S
Temperature is known to influence many aspects of organisms and is frequently linked to geographical species distributions. Despite the importance of a broad understanding of an animal’s thermal biology, few studies in- corporate more than one metric of thermal biology. Here we examined an elevational assemblage of Habronattus jumping spiders to measure different aspects of their thermal biology including thermal limits (CTmin , CTmax), thermal preference, V̇CO2 as proxy for metabolic rate, locomotor behavior and warming tolerance. We used these data to test whether thermal biology helped explain how species were distributed across elevation. Habronattus had high CTmax values, which did not differ among species across the elevational gradient. The highest-eleva- tion species had a lower CTmin than any other species. All species had a strong thermal preference around 37 °C. With respect to performance, one of the middle elevation species was significantly less temperature-sensitive in metabolic rate. Differences between species with respect to locomotion (jump distance) were likely driven by differences in mass, with no differences in thermal performance across elevation. We suggest that Habronattus distributions follow Brett’s Rule, a rule that predicts more geographical variation in cold tolerance than heat. Additionally, we suggest that physiological tolerances interact with biotic factors, particularly those related to courtship and mate choice to influence species distributions. Habronattus also had very high warming tolerance values (>20 °C, on average). Taken together, these data suggest that Habronattus are resilient in the face of cli- mate-change related shifts in temperature.
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National Science Foundation, Award: IOS-1556421
National Science Foundation, Award: IOS-1558159