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In 2004, 2007, 2010, and 2013, the U.S. Geological Survey sampled benthic algae and invertebrates, and fish to assess the condition of the aquatic communities and water quality in 14 wadable streams near Milwaukee, Wisconsin. Additional community sampling was also done at a subset of three sites in 2011 and 2012 to assess temporal variation. Selected environmental (physical and chemical) data in the streams were collected to evaluate potential relations to the biota and the ecological health of the streams. Physical and chemical data included land-use/land cover; streamflow from USGS gages (except at two creeks that were not gaged); stream habitat; microhabitat at invertebrate collection points (depth, velocity,...
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Razorback suckers (Xyrauchen texanus) and Colorado pikeminnow (Ptychocheilus lucius) are two endangered species of cyprinids located in the San Juan River Basin. Numerous factors may be contributing to the decline of these fish populations including hydraulic alterations (impoundment; altered thermal and hydrological regimes), non-native species interactions and contaminants. An assessment of the physical (temperature, substrate, ultraviolet [UV] radiation), biological (macroinvertebrates), and chemical factors (metals, polycyclic hydrocarbons, other water quality factors) was conducted to determine whether these factors could be limiting populations at six sites within the San Juan River and at one site in Los...
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Aquatic ecological surveys are valuable to understanding the interaction between the biotic and abiotic components in rivers and streams. However, large-scale assessments of the water chemistry, geomorphology, and ecological community are usually not feasible due to limited resources. Beginning in 2013, the Regional Stream Quality Assessment Project of the US Geological Survey’s National Water Quality Program, began sampling 89-120 streams in each of 5 regions across the conterminous United States—the Midwest (2013), Southeast (2014), Pacific Northwest (2015), Northeast (2016), and California (2017). Sampling included water and streambed sediment chemistry, stage and temperature (Journey and others, 2015). The abiotic...


    map background search result map search result map Effects of Environmental Perturbations on the Aquatic Community in the San Juan River Southeast Regional Stream Quality Assessment Ecological Data Aquatic community and environmental data for 14 rivers and streams in the Milwaukee Metropolitan Sewerage District Planning Area, 2004-13 Aquatic community and environmental data for 14 rivers and streams in the Milwaukee Metropolitan Sewerage District Planning Area, 2004-13 Effects of Environmental Perturbations on the Aquatic Community in the San Juan River Southeast Regional Stream Quality Assessment Ecological Data