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Assessment of internal phosphorus loading in Spring Lake, MI.

The goal of this study is to determine the importance of sediment   phosphorus (P) in stimulating algal blooms in Spring Lake, and the   effectiveness of aluminum in reducing the release of P from the   sediments.    Spring Lake is hypereuthropic and impacted by high phosphorus   levels. The excessive phosphorus and other nutrients cause algal   blooms, which degrade the recreational and ecological health of the   lake. Historically, field measurements of phosphorus concentration   in watersheds have concentrated on the "external" loading of   phosphorus (from tributaries, runoff, and groundwater). Phosphorus   being released by the sediments at the bottom of a waterbody,   or "internal" loading, has recieved less attention. However, in   highly eutrophic lakes such as Spring Lake, internal loading can   account for a substantial amount of the total phosphorus load.  The application of a chemical, such as alum (aluminum sulfate), can   limit internal loading by binding the phosphorus to the sediments.   Alum was applied to Spring Lake in late 2  5. Our present study will   assess the effectiveness of the alum application by comparing new   data to previous studies conducted in 2  3 and 2  4.     Sediment cores will be collected from four sites in Spring Lake and   incubated/sampled for a month under aerobic and anaerobic conditions   to determine internal P loading rates. After the completion of the   internal loading measurements, sediment cores will be fractionated   to assess the amount of P bound to Fe/Al and Ca/Mg in the sediments.   Macroinvertebrates will also be identified and counted, to determine   if the alum has influenced their abundance and community composition.    (michigan); (phosphorous); (phosphorous loading); (eutrophication);   (Spring Lake); (algal bloom); (algal blooms)

Status
In progress
Type
Project
Start Date
End Date
Researchers
Alan SteinmanPrincipal Investigator
Associated with 9 projects
Rick RediskeResearcher
Associated with 7 projects
Agencies

Funding 2 projects for a total of $0.00
Scope of Study
Field Investigation
Laboratory Investigation
Scale of Phenomena
Biochemical
Ecosystem
Physical/Chemical
Impact of Pollutants
Nutrients, Including Phosphorus
State Province
Michigan
Purpose of Project
Loadings Determination
Resource Being Monitored
Bottom Sediment
Habitat
Plankton / Microorganisms
Suspended Sediments
Beneficial Use Impairment Assessments
Eutrophication or Undesirable Algae
Annex Numbers
Control of Phosphorus
Research & Development
Annex 17
Relationship of contaminated sediments on ecosystem health
General
Monitoring
Annex
  • Annex Numbers
    Annex Numbers
    Control of Phosphorus
    Research & Development
  • Annex 17
    Annex 17
    Relationship of contaminated sediments on ecosystem health

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