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dc.contributor.advisorRabeni, Charles F.en
dc.contributor.authorWilliams, Kristien_US
dc.coverage.spatialMissouri -- Meramec River Watershed
dc.date.issued2006eng
dc.date.submitted2006 Summeren
dc.descriptionThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.en_US
dc.descriptionTitle from title screen of research.pdf file viewed on (June 27, 2007)en_US
dc.descriptionIncludes bibliographical references.en_US
dc.descriptionThesis (M.S.) University of Missouri-Columbia 2006.en_US
dc.descriptionDissertations, Academic -- University of Missouri--Columbia -- Fisheries and wildlife.en_US
dc.description.abstractHierarchical classification systems have been widely used to delineate terrestrial ecounits at multiple spatial scales; however there has long been a need for an aquatic based classification system. A newly developed aquatic ecosystem classification system was tested using crayfish and macroinvertebrates at multiple spatial scales. Benthic macroinvertebrates were sampled from twenty-seven sites from three Aquatic Ecological System (AES) Types in the fall of 2001. Macroinvertebrate (MI) assemblages were tested for within- and between-Type similarities. DCA ordinations and similarity analyses showed that MI assemblages were more similar within AES Types than between AES Types. Regression analyses indicated that assemblages were related to large scale factors indicative of AES Type boundaries. Crayfish were sampled from the same twenty-seven sites from four habitat units (riffles, runs, backwaters, and vegetation plots) in fall 2001. Crayfish communities were similar within run and riffle habitats of the same AES Type and were similar within backwater and vegetation plots of the same AES Type. Crayfish correspondence to Valley Segment Type (VST) was related to stream size. Crayfish were captured from run habitats within three stream size classes in three neighboring watersheds in the summer of 2002. O. luteus dominated small-rivers, O. punctimanus dominated headwaters, while O. medius dominated creeks. Longitudinal distribution of crayfish was examined in summer of 2002. Crayfish were sampled from four stream sizes from headwater to big-river. Mean density of crayfish was greater in headwater and creek streams than in small- and big-river sites. Mean YOY crayfish capture was greater than adults for all species in all stream sizes. Crayfish sampling gear was tested in the summer of 2002 and 2003 for adult and YOY crayfish age classes. The semi-quantitative kick seine used in this study was compared to a quantitative to quadrat sampler. The quadrat sampler consistently captured more individuals than the kick seine, but not in a predictable manner. Regression analyses showed high variability and low correlation between the quadrat and either seine method for both years and in all age classes.en_US
dc.identifier.other.b58881189en_US
dc.identifier.urihttp://hdl.handle.net/10355/4580
dc.publisherUniversity of Missouri--Columbiaen_US
dc.relation.ispartofcollection2006 Freely available theses (MU)
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. Graduate School. Theses and Dissertations. Theses. 2006 Theses
dc.subject.lcshAquatic ecologyen_US
dc.subject.lcshInvertebrates -- Classificationen_US
dc.subject.lcshCrayfish -- Classificationen_US
dc.titleMacroinvertebrate and crayfish communities in the Meramec River drainage basin: an investigation at multiple spatial scalesen_US
dc.typeThesisen_US
dc.type.genreElectronic booksen_US
dc.type.genreElectronic dissertationsen_US
dc.type.genreFreely available online resourcesen_US
thesis.degree.disciplineFisheries and wildlife sciencesen_US
thesis.degree.disciplineFisheries and wildlife scienceseng
thesis.degree.grantorUniversity of Missouri--Columbiaen_US
thesis.degree.levelMastersen_US
thesis.degree.nameM.S.en_US


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