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dc.contributor.advisorDoolittle, William Emeryen
dc.contributor.advisorKnapp, Gregory W.en
dc.creatorKirkham, William Stuarten
dc.date.accessioned2008-08-28T22:07:57Zen
dc.date.available2008-08-28T22:07:57Zen
dc.date.issued2005en
dc.identifierb59923416en
dc.identifier.urihttp://hdl.handle.net/2152/1595en
dc.descriptiontexten
dc.description.abstractMerremia peltata has been identified as an invasive species of environmental concern in several Pacific Island countries, and several environmental agencies are seeking means of controlling it. The species is native to this region, and very little is known about it, scientifically. This study investigates some fundamental questions about the invasion from a biogeographic perspective, such as causes of the invasion, both natural and anthropogenic, and prospects for remediation. Given that biological invasions are acknowledged to be a human driven phenomenon, the study also examines cultural and political aspects of the invasion, including perspectives on the plant across several social scales and exploring the social context in which the problem has been identified and addressed. Methods thus employ both biogeographic and ethnographic approaches. Aerial photographs and GIS and field mapping (traditional and GPS) were employed to develop a stratified random sample of vegetation plots. Vegetation cover and environmental data were gathered. Cluster Analysis and Nonmetric Multidimensional Scaling (NMS) were used to analyze the vegetation data. Cultural immersion, progressive contextualization and Q- methodology were employed in ethnographic analysis. Biogeographic results indicate that the dominance of Merremia peltata on the landscape is driven by fluctuating patterns of disturbance on the landscape. Disturbance is seen to be the driving force behind the changing character of floral biodiversity through its interaction with the reproductive and dispersal habits of the plant species. This disturbance arose from changes in patterns of land use as the regional economy shifted from colonial to post-colonial patterns contributed to M. peltata’s dominance. Village level planters and local ecologists are less concerned about this species dominance on the landscape than regional ecologists are. Lingering power inequalities from the colonial period between the core and peripheral countries in the region give more weight to the core perspectives becoming enacted, effectively intervening in these landscapes to protect their own. Recommendations for managing Merremia peltata in situ are given, including aiding successional processes.
dc.format.mediumelectronicen
dc.language.isoengen
dc.rightsCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.subject.lcshMerremia peltataen
dc.subject.lcshBiological invasions--Samoaen
dc.subject.lcshBiogeography--Samoaen
dc.titleValuing invasives: understanding the Merremia peltata invasion in post-colonial Samoaen
dc.description.departmentGeography and the Environmenten
dc.identifier.oclc61387337en
dc.identifier.proqst3174487en
dc.type.genreThesisen
thesis.degree.departmentGeography and the Environmenten
thesis.degree.disciplineGeographyen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen


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