2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/27/2021 | 2:00 PM - 3:30 PM | THE EFFICACY OF DISSOLVED CARBON DIOXIDE FOR PREVENTING SPREAD OF AQUATIC INVASIVE INVERTEBRATES | Virtual Platform
THE EFFICACY OF DISSOLVED CARBON DIOXIDE FOR PREVENTING SPREAD OF AQUATIC INVASIVE INVERTEBRATES
The US EPA recently registered dissolved carbon dioxide (CO2) as a management tool for preventing aquatic invasive species spread. This allows managers to infuse strategic areas with 100-150 mg/L of dissolved CO2 to induce avoidance behavior in organisms. A primary motivation of this is to prevent the spread of Asian carp into the Great Lakes. Invertebrates regularly become serious invaders but the impact of dissolved CO2 on invertebrates is largely unknown. We tested three crayfish species, three mollusk species, two amphipod species and zooplankton to determine the efficacy of this tool. First, we tested the short-term (30 and 60 minutes) behavioral and lethal effects of dissolved CO2 by exposing invertebrates to a range of concentrations (70-500 mg/L). Next, we tested whether invertebrates actively avoid areas with high CO2. Although behavioral responses varied by species most had low mortality below 500 mg/L CO2. Adult crayfish avoided CO2 concentrations ranging from 100-250 mg/L but juvenile crayfish and other species did not. Our results show that permissible levels of dissolved CO2 may be effective at preventing spread of fish and adult crayfish but will not likely affect spread of other invertebrate invaders.
- Movement
- Socio-ecological systems
- Adaptive management
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Presenters/Authors
Colette Copic
(), Loyola University Chicago, ccopic@luc.edu;
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Natalia Szklaruk
(), Loyola University Chicago, nszklaruk@luc.edu;
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Reuben Keller
(), Loyola University Chicago, rkeller1@luc.edu;
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