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Water chemistry responses to vacant and active beaver dams.

dc.contributor.authorCarpenter, Kellien_US
dc.contributor.authorDawson, Krisen_US
dc.contributor.authorReyes, Brianen_US
dc.contributor.authorThompson, Lydiaen_US
dc.coverage.spatialCarp Creeken_US
dc.coverage.spatialMaple River - East Branchen_US
dc.coverage.spatialBeavertail Creeken_US
dc.date.accessioned2007-06-14T22:04:55Z
dc.date.available2007-06-14T22:04:55Z
dc.date.issued1993en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/54416
dc.description.abstractThis study was conducted to examine the effects of active and abandoned beaver dams on stream water chemistry and primary productivity. We expected to find an increase in downstream nutrients and productivity at actively maintained sites, since beavers excrete a considerable amount of nutrient-rich waste material. Four dam sites were selected and analyzed to determine their temperature, pH, dissolved oxygen, nitrogen, phosphorus, silica, and chlorophyll. These factors were measured using samples from both above and below the beaver dams, and the results of these tests were compared and contrasted between active and abandoned sites. We found there was no significant differences in any of the variables above and below the beaver dam. However, there were significant differences between active and abandoned sites in nitrogen and silica levels, indicating higher nutrient availability at active sites. Finding this, we would expect to see higher productivity at active sites, but chlorophyll levels showed no significant differences. We can conclude that the presence of beavers at dams has the effect of increasing nutrient levels in the stream, but this does not directly result in an increase in productivity. There are many other environmental factors that need to be considered to actually determine how productive an aquatic ecosystem may be.en_US
dc.format.extent536217 bytes
dc.format.extent3144 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.relation.haspartGraphen_US
dc.relation.haspartTable of Numbersen_US
dc.subjectGeneral Ecologyen_US
dc.subject.otherMAMMALSen_US
dc.subject.otherVERTEBRATESen_US
dc.subject.otherBEAVERen_US
dc.subject.otherCASTORen_US
dc.subject.otherWATERen_US
dc.subject.otherCHEMISTRYen_US
dc.subject.otherNUTRIENTSen_US
dc.subject.otherTEMPERATUREen_US
dc.subject.otherOXYGENen_US
dc.subject.otherNITROGENen_US
dc.subject.otherPHOSPHORUSen_US
dc.subject.otherSILICAen_US
dc.subject.otherCHLOROPHYLLen_US
dc.subject.otherPRODUCTIVITYen_US
dc.titleWater chemistry responses to vacant and active beaver dams.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/2027.42/54416/1/2853.pdfen_US
dc.description.filedescriptionDescription of 2853.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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