2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/20/2019 | 9:45 AM - 10:00 AM | USING EDNA TO DETECT AND MONITOR AQUATIC INVASIVE PLANTS | 251 DE
USING EDNA TO DETECT AND MONITOR AQUATIC INVASIVE PLANTS
Environmental DNA is a rapidly developing technology for use in aquatic invasive species management, however, there are substantial unknowns with respect to application in monitoring programs. We conducted experimental and field-based sampling to test detectability of two invasive aquatic plants (Egeria densa and Myriophyllym spicatum) using eDNA, and evaluate feasibility of this method to supplement current monitoring approaches. In 2017, a mesocosm experiment was conducted over a 10-week period to assess changes in eDNA detection as a function of plant growth stage and biomass. In 2018, eDNA samples were collected from western Washington lakes with varying species abundances, and a subset of lakes were sampled throughout the year to test temporal variability in detection. In mesocosm experiments, we found that detection was less reliable while plants were actively growing, and improved as a function of both increased biomass and senescence. This was supported in field sampling results, which resulted in higher detections during peak biomass and senescence periods. However, detection was unsuccessful except at the highest levels of plant abundance in both experiments and the field, indicating challenges in using eDNA as a substitute for traditional monitoring.
- Monitoring
- Restoration
- Distribution
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Presenters/Authors
Lauren Kuehne
(), University of Washington, lauren.kuehne@gmail.com;
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Carl Ostberg
(), US Geological Survey, costberg@usgs.gov;
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Dorothy Chase
(), US Geological Survey, dchase@usgs.gov;
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Julian Olden
(), University of Washington, olden@uw.edu;
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