2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/23/2019 | 11:15 AM - 11:30 AM | DOES TEMPERATURE INFLUENCE ION TRANSPORT IN AQUATIC INSECTS? | 151 ABC
DOES TEMPERATURE INFLUENCE ION TRANSPORT IN AQUATIC INSECTS?
Temperature and salinity are critical abiotic factors that strongly influence the global distribution of aquatic organisms. Many aquatic ecosystems are simultaneously becoming warmer and saltier, but our understanding of how the interactions between these factors affect the physiology and life history outcomes of most aquatic species remain unknown. Work in our laboratory is beginning to explore the influence of temperature on ion transport rates in aquatic insects. We are testing the hypothesis that increasing metabolic rates associated with increasing temperatures may increase ion turnover rates, which may present additional energetic costs. For example, increasing temperature from 15°C to 25°C, increased 22-Na uptake rates by two-fold (P<0.0001) and 35-SO4 uptake rates by four-fold (P<0.0001) in Hydropsyche sp.. Smaller changes in 22-Na uptake rates were observed in Isonychia sp. and Maccaffertium sp. suggesting species-specific differences in the thermal sensitivity of ion transport. We will present research on the relationships among temperature, metabolic rates, and ion transport rates in both field collected and laboratory reared aquatic insects. Conceivably, the energetic cost of osmoregulation in warmer, saltier environments may lead to detrimental effects on certain species of freshwater insects.
- Temperature
- Ecotoxicology
- Metabolism
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Presenters/Authors
Sarah Orr
(), North Carolina State University, seorr@ncsu.edu;
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David Buchwalter
(), North Carolina State University, dbbuchwa@ncsu.edu;
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