2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 3:00 PM - 3:15 PM | THE RESPONSE OF LENTIC AQUATIC INVERTEBRATE ASSEMBLAGES TO SIMULATED CLIMATE CHANGE | 410 A
THE RESPONSE OF LENTIC AQUATIC INVERTEBRATE ASSEMBLAGES TO SIMULATED CLIMATE CHANGE
Preliminary evidence suggests that emergence rates of freshwater invertebrates may indicate the environmental conditions of aquatic ecosystems. To better understand the consequences of climate change on aquatic invertebrates, we investigated severe drying on experimental pond ecosystems using invertebrate emergence and morphology as bioindicators of ecosystem quality. Furthermore, we explored the efficacy of using the metabolome of an apex invertebrate predator, dragonflies (Odonata, Aeshnidae), as a molecular bioindicator of sublethal environmental stress. Replicate ecosystems were established and divided among four treatments: control, gradual drying, drying and refilling, or gradual refilling to simulate environmental stress associated with climate change. Invertebrates that emerged from the mesocosms were collected, identified, and enumerated daily. After 42 days, remaining larval insects were preserved for identification and enumeration; however, the dragonfly predator was flash-frozen and retained for molecular analysis. Based on preliminary results, we observed greater insect emergence from the experimental treatments than from the controls. Thus, we demonstrate the altered emergence of resident organisms in response to thermal-environmental stress. We anticipate the metabolome of the apex predator will provide additional evidence of antecedent sub-lethal environmental stress.
- Climate Change
- Mesocosm
- Metabolism
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Presenters/Authors
Nicholas Bielski
(), University of Wisconsin - Parkside, bielskin.v@gmail.com;
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Jessica Orlofske
(), University of Wisconsin-Parkside, orlofske@uwp.edu;
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