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Location Folder Show Tree ROOT _ScienceBase Catalog __National Water-Quality Assessment Project ___Regional Stream Quality Assessment Bifenthrin causes trophic cascade and altered insect emergences in mesocosms: implications for small streams Geospatial Database of the Study Boundaries, Sampled Sites, Watersheds, and Riparian Zones for the U.S. Geological Survey Regional Stream Quality Assessment Geospatial database of the study boundary, sampled sites, watersheds, and riparian zones developed for the U.S. Geological Survey Midwest Stream Quality Assessment Geospatial database of the study boundary, sampled sites, watersheds, and riparian zones for U.S. Geological Survey Southeast Stream Quality Assessment Pesticides in Weekly Water Samples from the NAWQA Midwest Stream Quality Assessment (2013) Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Office of Planning and Programming Barbara J. Mahler Holly A. Rogers Michelle L. Hladik Peter C. Van Metre Travis S. Schmidt Water Resources Categories Data (1) Tag Types Harvest Set (1) Label (1) USGS Scientific Topic Keyword (1) View Results as: JSON ATOM CSV Browse Folder

Bifenthrin causes trophic cascade and altered insect emergences in mesocosms: implications for small streams 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; Tags: National Water Quality Program, USGS Science Data Catalog (SDC), Water Quality