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Local zebra mussel presence within a benthic algal community has no impact upon nutrient levels, productivity and community composition.

dc.contributor.authorGreen, Danielen_US
dc.coverage.spatialDouglas Lakeen_US
dc.coverage.spatialRoberts Point - Douglas Lakeen_US
dc.date.accessioned2007-06-14T23:39:33Z
dc.date.available2007-06-14T23:39:33Z
dc.date.issued2006en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/55099
dc.description.abstractThe invasion of zebra mussels (Dreissena polymorpha) into North America has caused an ecological transfer of primary productivity from the pelagic and limnetic to the littoral and benthic zones of affected freshwater ecosystems. Though increased light levels have been proposed as the mechanism for observed increases in benthic algal productivity and changes in nutrient levels, both local and lake-wide, may bear some responsibility for these benthic algal changes. We removed zebra mussels from mature cyanobacterial and diatom matrices above rocks off Grapevine Point in Douglas Lake, Northern Michigan, and placed these rocks, alongside controls with zebra mussels remaining, in a cleared zone. We then measured NH4, PO4, chlorophyll a and community compositional changes with an initial sampling, and a final sampling 10 days later, for both control and altered algal matrices. No significant changes were observed in nutrient concentrations, chlorophyll a concentrations, or community compositions within the benthic algal communities at either controlled or altered sites. Possible explanations include the limited spatial and temporal scale of the study, the influence of the surrounding lake environment, and potential complexity of observed broader ecological interactions at the local level.en_US
dc.format.extent1585092 bytes
dc.format.extent3144 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.relation.haspartGraphen_US
dc.subjectLimnologyen_US
dc.subject.otherINVERTEBRATESen_US
dc.subject.otherALGAEen_US
dc.subject.otherMUSSELSen_US
dc.subject.otherMOLLUSCSen_US
dc.subject.otherCOMMUNITIESen_US
dc.subject.otherBENTHICen_US
dc.subject.otherPRIMARYen_US
dc.subject.otherPRODUCTIONen_US
dc.subject.otherROCKSen_US
dc.subject.otherCOLONIZATIONen_US
dc.titleLocal zebra mussel presence within a benthic algal community has no impact upon nutrient levels, productivity and community composition.en_US
dc.typeWorking Paperen_US
dc.subject.hlbsecondlevelNatural Resource and Environmenten_US
dc.subject.hlbtoplevelScienceen_US
dc.contributor.affiliationumBiological Station, University of Michiganen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/55099/1/3544.pdfen_US
dc.description.filedescriptionDescription of 3544.pdf : Access restricted to on-site users at the U-M Biological Station.en_US
dc.owningcollnameBiological Station, University of Michigan (UMBS)


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