Aquatic Plant Assessments for Spring Creek Low-Dose Fluridone Injection Treatment. Year-of-Treatment and 2-Year Post-Treatment Findings

摘要

Lake Seminole was impounded in 1957 and hydrilla was discovered in the 1980's. By 1992, approximately 75 percent of the surface area of the reservoir was impacted by hydrilla. This study was conducted to determine effectiveness of low dose fluridone treatments in the Spring Creek Arm of Lake Seminole. Pre- and post-aquatic plant surveys using point-intercept, plant biomass and hydroacoustic techniques were conducted to assess treatment success. In year 2000, pretreatment surveys found hydrilla occurred between 71.4 to 100 percent of all Spring Creek sites. By year 2002, in the upper regions of Spring Creek, hydrilla had been replaced by several native aquatic plant species including pondweeds, muskgrass, naiads, and coontail. In the lower regions, hydrilla was still the most frequently observed plant; however, several native plants, including coontail, muskgrass, naiads, and pondweeds had increased in frequency as compared to year 2000 when the pretreatment surveys were conducted.