2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 9:30 AM - 9:45 AM | AQUATIC INVERTEBRATE COMMUNITIES ASSOCIATED WITH ELODEA CANADENSIS: A COMPARISON BETWEEN ITS NATIVE AND NON-NATIVE RANGES | 420 A
AQUATIC INVERTEBRATE COMMUNITIES ASSOCIATED WITH ELODEA CANADENSIS: A COMPARISON BETWEEN ITS NATIVE AND NON-NATIVE RANGES
The aquatic macrophyte, Elodea Canadensis (Canadian Waterweed), hereafter Elodea, is a successful invader around the world. Its presence in Alaska is a concern because of the threat it poses to ecosystem services provided by invaded habitats. One hypothesis proposed for the success of aquatic invasive plants in naïve systems is the absence of herbivory. The goal of this study was to compare aquatic invertebrate communities associated with Elodea in native (Illinois) and invasive (Copper River Delta (CRD), Alaska) areas. Aquatic invertebrates were sampled monthly (May – August) from Elodea beds in four Illinois ponds and four CRD ponds. Aquatic invertebrate abundance and species richness were higher in Elodea beds from native ponds than invaded ponds. Although Chironomidae (Diptera) were the numerically dominant insects in Elodea beds from both native and invaded ponds, Chironomidae abundance was significantly higher in Elodea beds from native ponds. Densities of taxa commonly associated with vascular hydrophytes also were significantly greater in native ponds and included genera known to feed on aquatic macrophytes. Lower abundance or absence of ecologically similar taxa in invaded ponds may contribute to Elodea’s success on the CRD.
- Invasive
- Macrophyte
- Functional Feeding Groups
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Presenters/Authors
Jennifer Piacente
(), Loyola University Chicago , jpiacente@luc.edu;
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Chantel Adelfio
(), Copper River Watershed Project , chantel@copperriver.org;
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Martin B. Berg
(), Loyola University Chicago, mberg@luc.edu;
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