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To investigate the effects of imidacloprid on natural stream communities under controlled conditions, experimental streams were dosed with imidacloprid at concentrations ranging from 0.061 to 220 micrograms per liter (µg/L) for a period of 10 days. Natural stream macroinvertebrate communities were obtained from the Cache La Poudre River (Larimer County, CO) by colonizing trays full of large gravel for 75 days. The trays were added to laboratory experimental streams (mesocosms) at the USGS Fort Collins Science Center in Fort Collins, CO. At the end of 10 days, invertebrate abundance metrics were analyzed in relation to measured imidacloprid concentrations in water from the experimental streams. Declines in total...
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Direct and indirect ecological effects of the widely used insecticide bifenthrin on stream ecosystems are largely unknown. To investigate such effects, a manipulative experiment was conducted in stream mesocosms that were colonized by aquatic insect communities and exposed to bifenthrin-contaminated sediment; implications for natural streams were interpreted through comparison of mesocosm results to a survey of 100 Midwestern streams, USA. In the mesocosm experiment, direct effects of bifenthrin exposure included reduced larval macroinvertebrate abundance, richness, and biomass at concentrations (EC50s ranged 197.6 – 233.5 ng bifenthrin/ g organic carbon) previously thought safe for aquatic life. Indirect effects...
Categories: Data;
Types: Citation;
Tags: Illinois,
Indiana,
Iowa,
Kansas,
Kentucky, All tags...
Michigan,
Midwest United States,
Minnesota,
Missouri,
Nebraska,
Ohio,
South Dakota,
Wisconsin,
adult emergence,
aquatic insect communities,
aquatic-terrestrial linkages,
bifenthrin,
contaminants,
mesocosm,
pesticides,
sediment quality,
suspended sediment,
trophic cascade,
water quality, Fewer tags
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Direct and indirect ecological effects of the widely used insecticide bifenthrin on stream ecosystems are largely unknown. To investigate such effects, a manipulative experiment was conducted in stream mesocosms that were colonized by aquatic insect communities and exposed to bifenthrin-contaminated sediment; implications for natural streams were interpreted through comparison of mesocosm results to a survey of 100 Midwestern streams, USA. In the mesocosm experiment, direct effects of bifenthrin exposure included reduced larval macroinvertebrate abundance, richness, and biomass at concentrations (EC50s ranged 197.6 – 233.5 ng bifenthrin/ g organic carbon) previously thought safe for aquatic life. Indirect effects...
Categories: Data;
Types: Citation;
Tags: Illinois,
Indiana,
Iowa,
Kansas,
Kentucky, All tags...
Michigan,
Midwest,
Minnesota,
Missouri,
Nebraska,
Ohio,
South Dakota,
Wisconsin,
adult emergence,
aquatic insect communities,
aquatic-terrestrial linkages,
bifenthrin,
contaminants,
mesocosm,
pesticides,
sediment quality,
suspended sediment,
trophic cascade,
water quality, Fewer tags
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Direct and indirect ecological effects of the widely used insecticide bifenthrin on stream ecosystems are largely unknown. To investigate such effects, a manipulative experiment was conducted in stream mesocosms that were colonized by aquatic insect communities and exposed to bifenthrin-contaminated sediment; implications for natural streams were interpreted through comparison of mesocosm results to a survey of 100 Midwestern streams, USA. In the mesocosm experiment, direct effects of bifenthrin exposure included reduced larval macroinvertebrate abundance, richness, and biomass at concentrations (EC50s ranged 197.6 – 233.5 ng bifenthrin/ g organic carbon) previously thought safe for aquatic life. Indirect effects...
Categories: Data;
Types: Citation;
Tags: Illinois,
Indiana,
Iowa,
Kansas,
Kentucky, All tags...
Michigan,
Midwest United States,
Minnesota,
Missouri,
Nebraska,
Ohio,
South Dakota,
Wisconsin,
adult emergence,
aquatic insect communities,
aquatic-terrestrial linkages,
bifenthrin,
contaminants,
mesocosm,
pesticides,
sediment quality,
suspended sediment,
trophic cascade,
water quality, Fewer tags
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Dissolved pesticides were measured in weekly water samples from 100 wadeable streams across eleven states in the Midwestern U.S. during May-August, 2013, as part of the Midwest Stream Quality Assessment study conducted by the U.S. Geological Survey's (USGS) National Water Quality Assessment (NAWQA) Project. Of the 100 stream sites, 12 were urban indicator sites and the remaining 88 sites were located along an agricultural gradient of watershed land use. Twelve depth- and width-integrated samples were collected at each site within the 14-week study period. Water samples were filtered (0.7 micrometers) and analyzed for 227 pesticide compounds by direct-injection liquid chromatography with tandem mass-spectrometry,...
Categories: Data;
Types: Citation;
Tags: Corn Belt,
Illinois,
Indinana,
Iowa,
Kansas, All tags...
Kentucky,
Minnesota,
Missouri,
NAWQA,
National Water Quality Assessment,
National Water Quality Program,
Nebraska,
Ohio,
South Dakota,
USGS Science Data Catalog (SDC),
United States,
Water Resources,
Wisconsin,
aquatic insect communities,
aquatic toxicity,
fungicide,
herbicide,
insecticide,
mixtures,
pesticide,
pesticide degradate,
stream,
water quality, Fewer tags
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