Ecological impacts of an exotic benthivorous fish in large experimental wetlands, Delta Marsh, Canada / Pascal H.J. Badiou and L. Gordon Goldsborough.
Material type:
TextSeries: Wetlands. 30(4) 657-667 Publication details: 2010.Description: illustrations ; 28 cmLOC classification: - BAD
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Includes bibliographical references (pages 666-667).
The Common Carp (Cyprinus carpio) is an exotic
benthivorous fish that can have negative impacts in aquatic
ecosystems. This study examines the direct and indirect
ecological impacts of Common Carp on water column
nutrient concentrations, suspended solids, sedimentation, and
submersed macrophytes in large (5–7 ha) experimental
wetlands in Delta Marsh, Manitoba, Canada. In general, the
effects of Common Carp on water quality were similar to
those encountered in systems undergoing cultural eutrophication.
With increasing densities of Common Carp, water
column nutrient concentrations, suspended solids, and chlorophyll
a increased while dissolved oxygen concentrations,
submersed macrophyte density, and photic depth decreased.
The wetlands did not become noticeably more turbid, contrary
to our expectation, probably due to the mitigating effects of
dense submersed macrophyte beds, and to high water color
that likely prevented phytoplankton from flourishing.