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Monitoring, modeling, and management impacts of bivalve filter feeders in the oligohaline and tidal fresh regions of the Chesapeake Bay system

Author

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  • Cerco, Carl F.
  • Noel, Mark R.

Abstract

Populations of bivalve filter feeders are distributed throughout the oligohaline waters of the Chesapeake Bay system and, to a lesser extent, in tidal fresh waters as well. Previous studies indicate these bivalves significantly diminish phytoplankton concentrations in one major tributary, the Potomac River, and observed chlorophyll concentrations suggest bivalve influence on phytoplankton in other oligohaline reaches. We incorporated a model of these bivalves into an existing eutrophication model of the system. The model indicated that bivalves may reduce phytoplankton concentrations in oligohaline and tidal fresh waters throughout the system but the most significant effects were noted in the Potomac and Patuxent tributaries. Bivalve impacts were related to hydraulic residence time. The greatest phytoplankton reductions occurred in the regions with the longest residence time. Model carbon and nutrient budgets indicated bivalves removed 14% to 40% of the carbon load, 11% to 23% of the nitrogen load, and 37% to 84% of the phosphorus load to the regions where their impact on computed chlorophyll was greatest.

Suggested Citation

  • Cerco, Carl F. & Noel, Mark R., 2010. "Monitoring, modeling, and management impacts of bivalve filter feeders in the oligohaline and tidal fresh regions of the Chesapeake Bay system," Ecological Modelling, Elsevier, vol. 221(7), pages 1054-1064.
    • Handle: RePEc:eee:ecomod:v:221:y:2010:i:7:p:1054-1064
    DOI: 10.1016/j.ecolmodel.2009.07.024
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    Cited by:

    1. Cerco, Carl F. & Threadgill, Tammy & Noel, Mark R. & Hinz, Scott, 2013. "Modeling the pH in the tidal fresh Potomac River under conditions of varying hydrology and loads," Ecological Modelling, Elsevier, vol. 257(C), pages 101-112.

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