Langdon, Stephen F. , Martine, Christopher T. , Oles, Hilary A. .
Can Hydrocharis morsus-ranae (European frogbit, Hydrocharitaceae) be eradicated in an Early Detection and Rapid Response context?
Hydrocharis morsus-ranae (European frogbit, Hydrocharitaceae) is an invasive emergent aquatic species with a North American distribution that is so far limited to localized populations in Ontario, Quebec, New York, Vermont and Eastern Great Lakes states. Efforts to eradicate an incursion at Lampson’s Falls in the Grasse River Wild Forest (Town of Clare, southern St. Lawrence County, New York) began in June of 2007. Given the reproductive characteristics of the species – aggressive vegetative reproduction via turions with no apparent sexual reproduction - we explored the possibility of eradicating all plants in this closed system during a three-year period. The site was sampled for H. morsus-ranae coverage, plus aquatic and terrestrial plant diversity in relation to the infestation. Volunteers and staff hand harvested approximately 450 kg of wet plant matter from the site in the first season and 100 kg the second season. Results of the eradication effort and 2 years of follow-up surveys are presented. Recommendations for limiting H. morsus-ranae recruitment and establishment are also discussed, including strategies for taking advantage of the phenological constraints of the species.
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1 - Plattsburgh State University of New York, Center for Earth and Environmental Science, 101 Broad Street, Plattsburgh, NY, 12901
2 - Plattsburgh State University of New York, Biological Sciences, 101 Broad Street, Plattsburgh, NY, 12901, USA
3 - Adirondack Park Invasve Plant Program/Adirondack Nature Conservancy, P.O. Box 65, Keene Valley, NY, 12943, USA
Presentation Type: Poster:Posters for BSA Sections
Location: Event Tent/Cliff Lodge
Date: Tuesday, July 28th, 2009
Time: 5:30 PM