EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/24/2018 | 11:00 AM - 11:15 AM | OF LIMPKINS AND APPLE SNAILS: INVASIVE SPECIES, NOVEL ECOSYSTEMS, AND AN UNCERTAIN FUTURE | 410 A
OF LIMPKINS AND APPLE SNAILS: INVASIVE SPECIES, NOVEL ECOSYSTEMS, AND AN UNCERTAIN FUTURE
Lake Seminole, in southwestern Georgia, USA is a run-of-the-river reservoir completed in 1957 for hydropower and navigation. Lake Seminole lies at the base of a large watershed with one urbanized, highly regulated, and another free-flowing, mostly rural, tributary. Multiple invasive species are abundant in the reservoir including Hydrilla verticillata and Corbicula fluminea introduced in the 1960’s, and Pomacea maculata, recently introduced. We examined its’ development as a novel ecosystem. Hydrilla coverage ranged from 35-50% of reservoir area, varying with seasonal and annual hydrologic conditions. Corbicula abundance was 55 ± 29 per square meter, sufficient to filter the reservoir volume every 6-181 days, depending on temperature. Based on egg mass surveys, P. maculata populations are rapidly expanding, and displacing the native P. paludosa. Viewed in isolation, each invasive is undesirable, promoting adverse effects outside of their native range. However, viewed at a higher whole-lake or ecosystem scale, a somewhat different conceptual picture emerges. Lake Seminole contributes many ‘desirable’ ecosystem services within the river basin it occupies. Going forward, should we continue to focus on invasive extirpation or expand our management perspective to accept human-dominated novel ecosystems and the services they provide?
- Lentic
- Macrophyte
- Nutrient Recycling
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Presenters/Authors
Stephen W. Golladay
(), J.W.Jones Research Center, steve.golladay@jonesctr.org;
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Matthew Waters
(), Auburn University, mwaters@auburn.edu;
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Chelsea Smith
(), The Jones Center at Ichauway, chelsea.smith@jonesctr.org;
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Nicholas Marzolf
(), J.W. Jones Ecological Research Center, nmarzolf@jonesctr.org;
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Stephen Shivers
(), US EPA Office of Research and Development ORISE Fellow, Shivers.stephen@epa.gov;
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Brian Clayton
(), J.W.Jones Research Center, bclayton@jonesctr.org;
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Alan Covich
(), University of Georgia, alanc@uga.edu;
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