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THE IMPACT OF SEDIMENT RESUSPENSION ON MERCURY CYCLING AND THE BIOACCUMULATION OF METHYLMERCURY INTO BENTHIC AND PELAGIC ORGANISMS

dc.contributor.advisorMason, Robert Pen_US
dc.contributor.authorBergeron, Christine Marieen_US
dc.date.accessioned2005-10-11T10:48:16Z
dc.date.available2005-10-11T10:48:16Z
dc.date.issued2005-08-10en_US
dc.identifier.urihttp://hdl.handle.net/1903/2985
dc.description.abstractSediment resuspension provides a potential mechanism for transferring Hg and MeHg from the sediment to filter feeding organisms and the pelagic food chain, and has been found to enhance Hg methylation. The study objective was to determine the effect of resuspension and clam density on Hg cycling and MeHg bioaccumulation into clams and zooplankton. Two, month-long mesocosm experiments were conducted. The Clam/No Clam Experiment compared resupension with clams (HDC1) versus without clams (NC). The Clam Density Experiment compared resuspension with a high-density population of clams (HDC2) compared with a low-density population of clams (LDC). In addition, a Hg stable isotope was added as a tracer to examine the complex trophic dynamics in the mesocosms. Results from the experiments suggest that clam density did not affect MeHg bioaccumulation into biota over the duration of the experiments. However, high clam density increased net production of MeHg in the water column.en_US
dc.format.extent2278458 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.titleTHE IMPACT OF SEDIMENT RESUSPENSION ON MERCURY CYCLING AND THE BIOACCUMULATION OF METHYLMERCURY INTO BENTHIC AND PELAGIC ORGANISMSen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentMarine-Estuarine-Environmental Sciencesen_US
dc.subject.pqcontrolledEnvironmental Sciencesen_US


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