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dc.contributor.authorCoetzee, B.W.T.
dc.date.accessioned2007-05-10T11:21:16Z
dc.date.available2007-05-10T11:21:16Z
dc.date.created2005en
dc.date.issued2007-05-10T11:21:16Z
dc.identifier.urihttp://hdl.handle.net/123456789/265
dc.description2005 honours thesis, supervised by Berndt Janse van Rensburg.en
dc.description.abstractInvasive alien plants constitute a significant threat to global biodiversity. Alien invasive plants are currently invading natural ecosystems in South Africa but their impacts on biodiversity are poorly understood, particularly their impact on arthropods. This study investigated the impact of alien silver wattle (A. dealbata) invasion on arthropod assemblages (with an emphasis on Coleoptera) in the Sani Pass region of the Drakensberg, South Africa. Pitfall traps, baited with cattle manure, were used to sample Coleoptera and Diptera assemblages in pristine grassland and also in Acacia dealbata invaded stands. Specimens were identified using the morphospecies concept. Coleoptera species assemblages differed significantly between grassland and invaded sites (Global R = 0.856, p = 0.02). Coleoptera and Diptera species richness and abundances was significantly lower in the invaded stands than in grassland. Tree beating and sweepnetting sampling methods conducted in invaded and grassland sites, respectively, showed lower arthropod abundance in invaded stands than in grassland. Ambient temperature measurements indicated that grassland had a much higher daily maximum temperature than that of invaded sites. The effects of spatial autocorrelation on the sampling regime were also assessed using a newly proposed statistical method. The finding that species richness and especially abundances are greatly reduced in invaded stands should be of great conservation concern as biodiversity is severely altered by this invasive alien plant. This study reiterates that invasive alien plants can constitute a significant threat to arthropod diversity.en
dc.description.statementofresponsibilityVhengani, Lufuno
dc.format.extent30208 bytes
dc.format.extent16522 bytes
dc.format.extent154570 bytes
dc.format.mimetypeapplication/vnd.ms-excel
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/pdf
dc.languageEnglishen
dc.language.isoen_US
dc.rightscopyrighten
dc.subjectEntomologyen
dc.titleSilver wattle (Acacia dealbata) alters arthropod assemblages in the Sani Pass region of the Drakensbergen
dc.mdidentification.purposeTo investigate the effects of A. dealbata invasion on arthropods in the Moist Upland Grassland of the Sani Pass region of the Drakensberg, eastern South Africa, with a focus on beetle (Coleoptera) morphospecies assemblages.en
dc.mdidentification.organizationnameCentre of Excellence for Invasion Biologyen
dc.mdidentification.deliverypointFaculty of Science, Natural Sciences Building, Private Bag X1, University of Stellenbosch, Matielanden
dc.mdidentification.postalcode7602en
dc.mdidentification.phone0218083607en
dc.mdidentification.electronicmailaddressvhengani@sun.ac.zaen
dc.mddataidentification.languageEnglishen
dc.mdusage.specificusageN/Aen
dc.mdusage.userdeterminedlimitationsN/Aen
dc.mdusage.usagedatetime2005
dc.mdconstraints.uselimitationN/Aen
dc.mdlegalconstraints.accessconstraintscopyrighten
dc.mdlegalconstraints.otherconstraintsSubject to CIB datasets and publication rulesen
dc.lilineage.statementN/Aen
dc.dqcompletenessomission.valueunitPercentageen
dc.dqcompletenessomission.valueattributedata100en
dc.mdmaintenanceinformation.maintenanceandupdatefrequencyUnknownen
dc.mdfeaturecataloguedescription.cataloguedate2007-05-10
dc.mddistributor.distributorcontactN/Aen
dc.mdformat.nameExcel and PDFen
dc.exgeographicboundingbox.westboundlongitudeN/Aen
dc.exgeographicboundingbox.eastboundlongitude29.42en
dc.exgeographicboundingbox.northboundlattitudeN/Aen
dc.exgeographicboundingbox.southboundlattitude29.63en
dc.exverticalextent.minimumvalueN/Aen
dc.exverticalextent.maximumvalue1700en
dc.exverticalextent.unitofmeasuremetersen
dc.cibprojectNAen


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