2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 11:30 AM - 11:45 AM | EFFECTS OF WATER TEMPERATURE UNDER PROJECTED CLIMATE CHANGE ON THE DEVELOPMENT AND SURVIVAL OF THE FAMILIAR BLUET DAMSELFLY (ENALLAGMA CIVILE) | 150 DEF
EFFECTS OF WATER TEMPERATURE UNDER PROJECTED CLIMATE CHANGE ON THE DEVELOPMENT AND SURVIVAL OF THE FAMILIAR BLUET DAMSELFLY (ENALLAGMA CIVILE)
Climate and land-use changes are the primary threats to aquatic invertebrate communities around the world. Within the Southern High Plains of North America, current climate change projections estimate increased air temperatures by 2 to 4°C, putting many aquatic organisms at risk from environmental changes affecting nymph and adult life stages. Increased air temperatures can lead to elevated water temperatures, but experiments are lacking on responses in terms of development or survival. The familiar bluet damselfly (Enallagma civile) was used as a model organism to study the effects of projected water heating on playa invertebrates. Eggs were collected and reared under four water temperature regimes (26, 32, 38, and 41°C). Nymph body measurements after molts, development rate, and deaths were recorded daily. Elevated water temperature was found to significantly affect all life stages. Nymphs in the two hotter treatments were smaller and had lower survivorship whereas individuals in the cooler temperatures generally survived to adulthood and were larger. Individuals reared at 32°C emerged the quickest, going from egg to adult in 26 days. Elevated temperatures can thus be both advantageous and detrimental, causing concern for aquatic invertebrates in the future.
- ClimateChange
- Wetland
- Temperature
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Presenters/Authors
Scott Starr
(), Biology Department, South Plains College, Levelland, TX 79336, sstarr@southplainscollege.edu;
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Nancy McIntyre
(), Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409-3131, nancy.mcintyre@ttu.edu;
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