Journal article
Thermal tolerances differ between diurnal and nocturnal foragers in the ant Ectatomma ruidum
Insectes sociaux, v 64(3), pp 439-444
01 Aug 2017
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Physiological constraints can limit thermal niche breadth in organisms, particularly for small-bodied ectotherms. Daily temperature fluctuations often surpass annual (seasonal) temperature variation in the tropics, suggesting diel temperature cycles could drive thermal specialization by individuals that are active at different times of the day. We used foraging workers of the Neotropical ant Ectatomma ruidum to assess whether diurnally and nocturnally active workers differed in thermal tolerance. We compared critical thermal maxima (CTmax) of nocturnal and diurnal foraging workers to explore thermal niche specialization over the diel cycle. We predicted that diurnally active workers would have higher CTmax because they occupy a warmer thermal niche. As predicted, diurnal foragers exhibited significantly higher CTmax (mean 1.1 A degrees C difference) than nocturnal foragers. Diurnal and nocturnal foragers were similar in body size, and there was no relationship between worker size and CTmax. We discuss possible mechanisms for this pattern, and the implications of within- versus between-colony differences in CTmax.
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Details
- Title
- Thermal tolerances differ between diurnal and nocturnal foragers in the ant Ectatomma ruidum
- Creators
- C. Esch - Michigan State UniversityJ. P. Jimenez - University of Puerto Rico at Río PiedrasC. Peretz - George Washington UniversityH. Uno - University of California, BerkeleyS. O'Donnell - Drexel UniversitySamantha E ODonnell - Accelerated Career Entry Bachelor of Science in Nursing (BSN)
- Publication Details
- Insectes sociaux, v 64(3), pp 439-444
- Publisher
- Springer Nature
- Number of pages
- 6
- Grant note
- Drexel University startup funds Organization for Tropical Studies
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES); Accelerated Career Entry Bachelor of Science in Nursing (BSN)
- Web of Science ID
- WOS:000405674800015
- Scopus ID
- 2-s2.0-85015096406
- Other Identifier
- 991019167890204721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Entomology