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Primary Productivity in the Lower Muskegon River Watershed

This project is an add-on to the Muskegon River Initiative, an  existing Great Lakes Fisheries Trust (GLFT) project. One of the major  components is the "Mega Model" project. The data collected by Grand  Valley State University?s Annis Water Resources Institute will serve  as additional input into the Mega Model. The Mega Model project  combines the considerable wealth of data, experience, and tools that  already exist in Michigan through the ongoing efforts at the  University of Michigan, Michigan State University, Grand Valley  University, their partners in state government (MDEQ, MDNR), and  watershed stakeholders. This collaborative effort is unique and draws  upon the diverse talents of many different organizations. Building  upon existing models, data, and management tools, a system-wide model  will be produced and used to perform risk assessment in the Muskegon  River Watershed.   To better quantify the role of primary producers as the base of the  fishery food web in the lower Muskegon River watershed, algal  productivity was measured during 2  4 and 2  5 in five major  macrohabitats: tributary, river, wetland, drowned river mouth lake  (Muskegon Lake), and nearshore Lake Michigan. Seasonally, periphyton  metabolism was measured from each major microhabitat (substrate)  using benthic chambers; plankton metabolism was evaluated using  light/dark bottles. Periphyton gross community production (GCP) and  production to respiration ratios (P:R) were highest at the river  site, with a mean peak GCP in summer of 13 g O2 m-2 day-1 and mean  peak P:R of 5.2 in spring. Lake Michigan had the highest mean peak  plankton GCP (3 g m-2 day-1, spring) and P:R  (3.8, fall). Only at  the river site (periphyton) and Lake Michigan (plankton) was P:R  consistently >1. All other sites showed some evidence of  heterotrophy, with P:R <1 on a seasonal or microhabitat basis. These  results indicate there is considerable spatial and temporal  heterogeneity of algal productivity in this system, which has  implications for fish habitat and recruitment.  

Status
In progress
Type
Project
Start Date
End Date
Researchers
Alan SteinmanPrincipal Investigator
Associated with 9 projects
Agencies
Great Lakes Fishery Trust $ 0.00USDEstimates

Funding 4 projects for a total of $935,071.00
Scope of Study
Field Investigation
Scale of Phenomena
Biochemical
Ecosystem
Processes
Natural Ecological Processes
Land Use and Habitat
Shoreline
Wetlands
Lake Basin Connecting Channels
Lake Michigan
State Province
Michigan
Annex Numbers
Pollution from Non-Point Sources
Research & Development
Surveillance and Monitoring
Annex 17
Cause-effect inter-relationships of productivity and ecotoxicity
Physical and transformational processes affecting delivery of pollutants
Pollution exchange between AOCs and open lakes
General
Annex
  • Annex Numbers
    Annex Numbers
    Pollution from Non-Point Sources
    Research & Development
    Surveillance and Monitoring
  • Annex 17
    Annex 17
    Cause-effect inter-relationships of productivity and ecotoxicity
    Physical and transformational processes affecting delivery of pollutants
    Pollution exchange between AOCs and open lakes

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