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EFFECTS OF HYDRILLA AND GRASS CARP ON WATER QUALITY IN A FLORIDA LAKE 1
Author(s) -
Canfield Daniel E.,
Maceina Michael J.,
Shireman Jerome V.
Publication year - 1983
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1983.tb02801.x
Subject(s) - hydrilla , macrophyte , aquatic plant , water quality , environmental science , chlorophyll a , plankton , secchi disk , eutrophication , nutrient , biology , fishery , ecology , botany
Changes in water chemistry, water clarity, and planktonic chlorophyll a were measured as hydrilla ( Hydrilla verticillata ) abundance increased and then decreased in Lake Baldwin, Florida. Grass carp ( Ctenopharyngodon idella ) were used to eliminate submersed macrophytes. No major trends in lake pH, conductivity, or total nitrogen concentrations occurred in association with changes in hydrilla levels. Increased Secchi disc transparency and reductions in total alkalinity, calcium, magnesium, potassium, total phosphorus, and chlorophyll a concentrations occurred as hydrilla abundance increased. Large increases in the chemical parameters and a reduction in Secchi disc transparency occurred as hydrilla decreased and was eliminated from the lake by grass carp. The effects of hydrilla on lake water chemistry are related to the percentage of the lake's volume infested with hydrilla and macrophyte standing crop.