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dc.contributor.authorMidoko Iponga, Donald
dc.contributor.authorRichardson, David M.
dc.contributor.authorMilton, Suzanne J.
dc.date.accessioned2009-05-29T08:08:34Z
dc.date.available2009-05-29T08:08:34Z
dc.date.created2006en
dc.date.issued2009-05-29T08:08:34Z
dc.identifier.urihttp://hdl.handle.net/123456789/380
dc.description.abstractUnderstanding the reasons why some alien species become invasive may help to identify appropriate management strategies. One hypothesis often cited to explain invasion success is the enemy release hypothesis (Williams 1954; Elton 1958; Blumenthal 2006), which attributes the success of alien species to the fact that they are freed from the limiting biotic mortality factors (e.g. diseases,herbivores and pathogens) when introduced to a new habitat. Escape from natural enemies, it is argued, may give alien species a competitive advantage over native species and lead to a demographic increase of their populations, possibly leading to invasion (Blumenthal 2006).en
dc.description.statementofresponsibilityMidoko Iponga, Donald
dc.description.statementofresponsibilityRichardson, David M
dc.description.statementofresponsibilityMilton, Suzanne J
dc.format.extent27648 bytes
dc.format.mimetypeapplication/vnd.ms-excel
dc.languageEnglishen
dc.language.isoen_US
dc.rightsintellectualPropertyRightsen
dc.subjectBotanyen
dc.titleMegastigmus wasp damage to seeds of Schinus molleen
dc.mdidentification.purposeIn total, 100 fresh ripe seeds of S. molle (with red pericarps) were collected beneath each of 30 randomly selected trees from the summer- and winter-rainfall regions (Western and Northern Cape Provinces of South Africa). Samples were collected during a survey of S. molle populations along national and provincial roads and also on farms during February 2006 (summer). Trees were sampled over a distance of about 387 km in the winter in the equinoctial rainfall region, between Stellenbosch (33°56’S 18°52’E) and Beaufort West (32°21’S 22°35’E) and over 237 km in the late summer rainfall region, from Bristown (30°35’S 23°30’E) to Kimberley (28°45’S 24°46’E).en
dc.mdidentification.organizationnameCentre of Excellence for Invasion Biologyen
dc.mdidentification.deliverypointFaculty of Science, Natural Sciences Building, Private Bag X1, Stellenbosch University, Matielanden
dc.mdidentification.postalcode7602en
dc.mdidentification.phone0218083408en
dc.mdidentification.electronicmailaddresskcd@sun.ac.zaen
dc.mddataidentification.languageEnglishen
dc.mdusage.specificusageAcademicen
dc.mdusage.userdeterminedlimitationsCommercial useen
dc.mdusage.usagedatetime2007-01-20
dc.mdlegalconstraints.accessconstraintsintellectualPropertyRightsen
dc.lilineage.statementThe seeds were then placed in a paper bag, labelled with tree number and region of occurrence, and later examined in the laboratory for seed predation by counting the number of intact and damaged seeds under a dissecting microscope. Insect-damaged seeds could be separated from other damaged seeds by the presence of insects inside the seeds or by emergence holes. Insect-damaged seeds were kept in a container for one year after the samples were collected and covered with a cotton screen for good aeration until insects emerged. Insects that emerged were photographed and samples were sent to the Department of Entomology and Nematology at the University of Florida. All the insects that emerged from seeds belonged to the same wasp species and produced emergence holes similar to those observed in the seeds collected.en
dc.dqcompletenessomission.valueunitPercentageen
dc.dqcompletenessomission.valueattributedata100en
dc.mdmaintenanceinformation.maintenanceandupdatefrequencyUnknownen
dc.mdfeaturecataloguedescription.cataloguedate2007-03-20
dc.mddistributor.distributorcontactUniversity of Stellenbosch - CIBen
dc.exgeographicboundingbox.westboundlongitude21.970559en
dc.exgeographicboundingbox.eastboundlongitude24.652666en
dc.exgeographicboundingbox.northboundlattitude-32.800781en
dc.exgeographicboundingbox.southboundlattitude-28.666929en
dc.exverticalextent.minimumvalue1198 m.a.slen
dc.exverticalextent.maximumvalue1198 m.a.slen
dc.exverticalextent.unitofmeasuremetersen
dc.cibprojectDeterminants of invasion and scenarios of changeen


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