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Monitoring 2010

Fall 2010 Field Surveys

August 17 J. Strom Thurmond Reservoir

Hydrilla in August

Stig in August
Micrograph of Stigonematales species colony growing on hydrilla at Thurmond August 2010 

Stig August 2010

August 19 Lake Varner

Micrograph of Stigonematales species colony growing on hydrilla at Varner August 2010

Hydrilla on top of lake

Algae screening results 2010
Algal screening results August 2010

This August 2010 screening data from two confirmed AVM sites is consistent with previous years. We documented that the hydrilla leaves have a high (5-90%) coverage by the new species of cyanobacteria Stigonematales species. Additional species (in red) growing on the hydrilla that can produce toxins include: Anabaena, Gloeotrichia, Lyngbya, Microcystis, Nostoc, Oscillatoria, and Pseudanabaena

 

Potential field sites 2010

AVM lakes with hydrilla include: DeGray Lake, Lake Ouachita (AR), Sam Rayburn Reservoir (TX), Lake Murray, Davis Pond, (SC) J. Strom Thurmond Reservoir (SC/GA) Lake Juliette, Emerald Lake, Lake Horton, Smith Reservoir, Lake Varner (GA), Coachmans Trail, Woodlake (NC)

Pictured is hydrilla
Hydrilla verticillata

AVM lakes with Egeria densa include: DeGray Lake, Lake Ouachita (AR) Lake Juliette (GA)

Brazilian waterweed
Egeria densa

AVM lakes with Eurasian watermilfoil include: Lake Hamilton (AR), L Lake and Par Pond (SC), Lake Juliette (GA)

Overview of eurasian watermilfoil
Myriophyllum spicatum