9 results for Hydrilla verticillata (hydrilla)

Impact ID Scientific Name Impact Type Study Type Study Location Impact Description Geographic Location Reference
2946 Hydrilla verticillata Recreation Observational N/A A survey of local anglers’ willingness to pay for Hydrilla verticillata controls are one indicator of the economic value of sport fishing. Florida, US 5148
2979 Hydrilla verticillata Recreation Experimental Field Mean total replacement value per hectare of vegetated area was $59,738 for hydrilla for estimating monetary values of the fisheries associated with that vegetation community. Total estimate economic worth of vegetation community in hydrilla ($195,800,068) 10239
3037 Hydrilla verticillata Recreation Observational Field Hydrilla restricts boat access and impedes other recreational activities such as angler access and swimming in a Texas Lake, requiring herbicide treatment and water withdrawal to control the plant. 31435
3061 Hydrilla verticillata Recreation Anecdotal N/A Hydrilla can interfere with swimming and boating by anglers and waterskiers in recreational waters. 33831
3075 Hydrilla verticillata Recreation Observational Field Hydrilla has affected tourism and navigation in Guatemala. 33837
7062 Hydrilla verticillata Recreation Observational Field Hydrilla verticillata seriously impedes recreational and commercial boating and prevents swimming and fishing; major infestations limit weight and size of sport fishes. Lake Wales, Polk County, Florida 10511
7063 Hydrilla verticillata Recreation Observational Field Large Hydrilla verticillata mats prevent access to many of the prime locations used for waterfowl hunting and most warmwater sport fishing. Low oxygen levels in these mats make them unsuitable for the growth and survival of sport fishes and most other aquatic animals. Heavy hydrilla infestations (those that cover more than 25 to 30 percent of the surface in large lakes and impoundments) eliminate fish habitat, cause stunting, and reduce the number of harvestable fish. North Carolina 5137
7064 Hydrilla verticillata Recreation Observational Field In the late 1980s, Hydrilla verticillata populations at Lake Guntersville, Alabama increased rapidly. A study examined the economic impact of aquatic plant control programs on recreational use of this lake between 1990 and 1994. Results suggest that the greatest economic value for recreation ($122 million annually) occurred when vegetation levels were 20% of the total lake area, and that revenue declined as hydrilla acreage increased. Lake Guntersville, Alabama 28606
7065 Hydrilla verticillata Recreation Observational Field Hydrilla verticillata infestations in just 2 Florida lakes have prevented their recreational use, causing $10 million annually in losses. Florida 14150

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