PurposeThe 2017 Remedial Action Plan Update highlighted the need for additional benthos and sediment toxicity assessment projects in the AOC by 2020, as comprehensive information on habitat suitability and the distribution of benthic invertebrates within the Lower Green Bay-Fox River AOC is lacking. UWGB will sample 80 sites within the AOC to assess the benthic invertebrate community and substrate distribution. UWGB will also perform bathymetry throughout the AOC and deploy dissolved oxygen data loggers in the lower bay of Green Bay. These bathymetry, substrate, and dissolved oxygen data can then be combined to assess benthic invertebrate habitat within the AOC specifically which will inform the status of the third element of the “Degradation of Benthos” BUI, and will also provide important information that will be used in the ongoing effort to develop management actions for the “Degradation of Fish and Wildlife Populations” and “Loss of Fish and Wildlife Habitat” BUIs. Resulting bathymetric data will also be important for ongoing development of hydrodynamic models that will support the development of any necessary management actions to address the “Beach Closings”, “Loss of Fish and Wildlife Habitat”, and “Degradation of Fish and Wildlife Populations” BUIs. UWGB will also analyze the stable isotopes of benthic invertebrates, prey fish and piscivores in Lower Green Bay in order to construct food webs and determine the energy contribution of the benthos to higher trophic levels.
ObjectiveInformation gained in the course of this work will not only assist in determining necessary steps for achieving and/or refining the benthos BUI targets, but is also expected to provide relevant information to the Fish and Wildlife Habitat and Populations Technical Advisory Committee that is engaged in a two year process for developing management actions associated with “Degradation of Fish and Wildlife Populations” and “Loss of Fish and Wildlife Habitat” BUIs.
Related ReportsRun Project Summary ReportView Umbrella-ProjectsView Related-Projects
Great Lakes Restoration Initiative
Toxics and Areas of Concern
Report of results from June 2018 samples written by Rebecca Fahney