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Sediment Toxicity to Benthic Communities Description of Work At two of Wisconsin's Areas of Concern (AOCs) on Lake Michigan, the Sheboygan River AOC and Milwaukee Estuary AOC, the USGS will assess whether sediment toxicity from PCBs, PAHs, selected metals, ammonia, or dissolved oxygen is present at acutely toxic or chronically toxic concentrations using sediment toxicity tests conducted with amphipods and midges. Study planning and literature search have been completed. Sediment was collected in October 2016 from sites in the two AOCs and sites in two non-AOC comparison sites. Assesments will be done at two additional sites: Kewaunee River and Oak Creek. Laboratory toxicity tests and chemical analyses are in progress, including sediment toxicity testing... Categories: Project; Tags: Area of Concern, Areas of concern, Beneficial use impairment, GLRI, Great Lakes Restoration Initiative, All tags... Has Spatial, Short term (2 to 5 years), Template 685, Toxic Substances, Watershed:Lake Michigan Basin, beikenberry@usgs.gov, benthos, sediment, toxicity, Fewer tags Toxicity in Stream-Dwelling Amphibians Description of Work USEPA Region 5 previously funded a study in 2011 evaluating the toxicity of nitrogen compounds to a select number of pond-dwelling amphibians. The objective of this new study will be to determine the toxicity of nitrogen compounds to stream-dwelling amphibians. Nitrogen contamination in aquatic systems results from the decomposition of organic matter, as well as through agricultural inputs, sewage effluents and industrial activities. Nitrogen in its various forms is of ecological concern because of its ubiquitous distribution and toxicity to aquatic life. Nitrogen compounds pose a hazard to aquatic larval stages of amphibians, affecting survival and development, and inducing deformities and behavioral... Categories: Project; Tags: Amphibians, GLRI, Great Lakes Restoration Initiative, Great Lakes Restoration Initiative, Major ion, All tags... Template 147, Toxic Substances, Toxicity, Uploaded in Batch, Fewer tags Toxicity Testing of Sculpins and Darters Description of Work The sensitivity of listed species of fish or amphibians was evaluated in acute and chronic toxicity tests conducted with a range of inorganic or organic chemicals with different toxic modes of action. Results of these studies indicate that the acute or chronic sensitivity of rainbow trout, but not fathead minnow, frequently provided protective acute or chronic toxicity thresholds for most of the listed species evaluated. However, only a limited number of species of sculpins or darters were included in this evaluation, and not all species tested occurred in the Great Lakes watershed. The objective of the proposed study will be to: (1) provide additional chronic toxicity data for sculpins or darters... Categories: Project; Tags: Darter, GLRI, Great Lakes Restoration Initiative, Great Lakes Restoration Initiative, Sculpin, All tags... Template 147, Toxic Substances, Toxicity, Uploaded in Batch, Fewer tags Development and Demonstration of a Sediment Toxicity Test Method with Freshwater Mussels for Assessing Sediment Contaminants in the Great Lakes Basin and within North America Description of Work Currently, a standard test method does not exist for evaluating the effects of sediment-associated toxicants on freshwater mussels. A standard guide for conducting water-only laboratory toxicity tests with freshwater mussels was approved in 2006 (ASTM 2008a) and provides a tested and validated, consensus-based methodology for conducting acute or chronic water toxicity tests with the early life stages (glochidia and juveniles) of freshwater mussels. Several recent peer-reviewed scientific publications have presented data on various toxicants (Bringolf et al. 2007a,b,c; Wang et al. 2007a,b,c) generated with this method and demonstrate consistency and reliability in inter-laboratory (round robin)... Categories: Project; Tags: GLRI, Great Lakes Restoration Initiative, Great Lakes Restoration Initiative, Mussels, Sediment, All tags... Template 147, Toxic Substances, Toxicity, Uploaded in Batch, Fewer tags Determination of the Sensitivity of Two Species of Amphibians to Toxicity From Nitrate, Nitrite and Ammonia Description of Work Determine the relative sensitivity of two species of amphibians (i.e. Wood Frogs Rana sylvatica, Cricket Frogs Acris crepitans blanchardi, American Toad Bufo americana) to exposure to acute and chronic levels of nitrate, nitrite and ammonia. This data will be used to evaluate the current ammonia criteria and for possible inclusion in the development of criteria for nitrite and nitrate. Categories: Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Amphibians, GLRI, Great Lakes Restoration Initiative, Great Lakes Restoration Initiative, Lake, All tags... Lake:Lake Erie, Lake:Lake Huron, Lake:Lake Michigan, Lake:Lake Ontario, Lake:Lake St. Clair, Lake:Lake Superior, Template 147, Toxic Substances, Uploaded in Batch, aquatic invertebrates, freshwater mussels, nitrogenous compounds, salts, toxicity, water quality criteria, Fewer tags Toxicity of Organic Chemicals in Mussels Description of Work The sensitivity of various species of freshwater mussels (Unioidea) to range of inorganic and organic chemicals has been evaluated in acute toxicity tests and the sensitivity of freshwater mussels to a range of inorganic chemicals has been evaluated in chronic toxicity tests. However, the chronic toxicity of organic chemicals has only been evaluated with a limited number of mussel species or for a limited number of organic chemicals. The objective of this study will be to evaluate methods for conducting 90-d water only exposures with juvenile mussels and conducted chronic 28-d toxicity tests with at least organic chemicals of concern and two commonly tested species of mussels (Lampsilis siliquoidea,... Categories: Project; Tags: GLRI, Great Lakes Restoration Initiative, Great Lakes Restoration Initiative, Mussels, Organic contaminant, All tags... Template 147, Toxic Substances, Toxicity, Uploaded in Batch, Fewer tags Generation of Chronic Toxicity Data for Sulfate Description of Work Goal of this task is to conduct studies to determine the acute and chronic toxicity of sulfate (as sodium sulfate) to early life stages of: (1) fish (fathead minnow, Pimephales promelas), (2) snails (pond snail Lymnaea stagnalis), and (3) mussels (fatmucket, Lampsilis siliquoidea). Categories: Project; Tags: GLRI, Great Lakes Restoration Initiative, Great Lakes Restoration Initiative, Major ion, Sulfate, All tags... Template 147, Toxic Substances, Toxicity, Uploaded in Batch, Fewer tags Toxicity Testing of Mayflies Description of Work A number of field studies have shown that mayflies (Ephemeroptera) tend to be more sensitive than other benthic macroinvertebrate taxa to elevated levels of total dissolved solids in streams impacted by mining. Until relatively recently, difficulties with culturing have precluded the use of mayflies as laboratory toxicity testing organisms; however, researchers at Stroud Water Research Center have found parthenogenic species that readily reproduce under laboratory conditions, and researchers at the US EPA EERD laboratory have developed laboratory cultured diets for mayflies that will help to move toward standardization of methods. Recent efforts at the Illinois Natural History Survey built upon... Categories: Project; Tags: GLRI, Great Lakes Restoration Initiative, Great Lakes Restoration Initiative, Major ion, Mayfly, All tags... Template 147, Toxic Substances, Toxicity, Uploaded in Batch, Fewer tags