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Location Folder Show Tree ROOT _ScienceBase Catalog __Upper Midwest Environmental Sciences Center (UMESC) ___Upper Midwest Environmental Sciences Center Data ____Laurentian Great Lakes GIS Data GLRI: Avian Botulism in Distressed Great Lakes Environments GLRI: Birds as Indicators of Contaminant Exposure in the Great Lakes GLRI: Characterizing Habitat and Food Web Structures Across Great Lakes Rivermouth Estuaries Imagery More... Filters Date Range Past year (3) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts James H Larson Upper Midwest Environmental Sciences Center U.S. Geological Survey U.S. Geological Survey - ScienceBase Rebecca M Kreiling More... Tag Types Theme (3) Place (3) USGS Scientific Topic Keyword (3) Harvest Set (3) Tag Schemes Common geographic areas (3) None (2) ISO 19115 Topic Category (3) USGS Thesaurus (1) Coastal and Marine Ecological Classification Standard (1) Marine Realms Information Bank (MRIB) keywords (1) View Results as: JSON ATOM CSV Browse Folder

Measurement of benthic invertebrates, zooplankton, stamp sands and metals from four beaches near Keweenaw Bay, Lake Superior in 2021 Between 1900 and 1932, a copper (Cu) mine operated near Gay, Michigan, along the shore of Lake Superior, discharged approximately 22.8 million metric tons of waste material known as ‘stamp sands’ (SS) to a nearby beach. This pile of SS has migrated via wind and rain along the beaches in northern Grand Traverse Bay and into Buffalo Reef, an important spawning area for Lake Trout and Lake Whitefish. During their first summer, these newly spawned fish consume benthic invertebrates and zooplankton in nearby beach habitats. SS contain elevated concentrations of metals (especially Cu) that are toxic to many invertebrate taxa, and studies have observed very few benthic taxa in areas with very high SS. Here, we sampled... Categories: Data; Tags: Aquatic Biology, Keweenaw Bay NE, Lake Superior, Michigan, Southcentral Lake Superior, All tags... USGS Science Data Catalog (SDC), Water Quality, Water Resources, Zooplankton, benthos, biota, copper, mine waste, plankton, stamp sands, Fewer tags Response of natural phytoplankton communities from Green Bay (Lake Michigan) and Maumee Bay (Lake Erie) to laboratory manipulations of nutrient and trace metal availability during late summer 2018 Microcystins (MC) are a class of cyanotoxins produced by many cyanobacteria taxa. Although toxic to metazoans, the evolution of microcystin pre-dates the appearance of metazoans, and so MC did not originate as a toxin to potential metazoan grazers. One hypothesized functional role of microcystin is the management and acquisition of metals, several of which form complexes with MC intracellularly. Metals are often used to build enzymes within the cell that allow cyanobacteria to use non-preferred nitrogen (N) and phosphorus (P) sources, such as nitrate, urea and organic P. If trace metals are in low supply, primary producers may become limited because of their inability to access these non-preferred N and P forms.... Categories: Data; Tags: Aquatic Biology, Great Lakes, Green Bay, Northwestern Lake Michigan, USGS Science Data Catalog (SDC), All tags... Western Lake Erie, cyanobacteria ["blue-green algae"], environment, Fewer tags Phosphorus and nitrogen cycling in streambed and suspended sediment in Bois Brule and Siskiwit Rivers WI, 2021-2023 Data Lake Superior is historically a nutrient poor lake that does not typically support significant cyanobacterial blooms. However, the lake has been experiencing an increase in blooms in the western portion of the basin recently. The largest blooms documented have occurred after recent major flooding events, indicating that nutrients transported to the lake during these events may be a source for the blooms. This study looks into the combination of streambed sediment-derived nutrient data during base flow conditions and suspended and settled sediment-derived nutrient data from storm events to provide information about nutrient transformation and storage in the river networks of the Bois Brule River and Siskiwit River... Categories: Data; Tags: Aquatic Biology, USGS Science Data Catalog (SDC), Upper Wisconsin, Water Quality, Western Lake Superior, All tags... biota, cyanobacterial blooms, denitrification, environment, inlandWaters, nitrification, phosphorus storage, streambed sediment, suspended sediment, Fewer tags