Thesis (M.S.)--University of Missouri-Columbia, 2004. / Typescript. Includes bibliographical references (leaves 111-117). Also available on the Internet.

Thesis (M.S.)--University of Missouri-Columbia, 2004. / Typescript. Includes bibliographical references (leaves 111-117). Also available on the Internet.

Thesis (Ph. D.)--University of New South Wales, 1995. / Includes bibliographical references (leaves 371-411).

Thesis (doctoral)--Swedish University of Agricultural Sciences, 2008. / Thesis documentation sheet inserted. Includes appendix of reprints of five papers and manuscripts co-authored with others. Includes bibliographical references. Also partially issued electronically via World Wide Web in PDF format; online version lacks appendix of papers.

Thesis (M.S.)--University of Northern British Columbia, 1998. / Includes bibliographical references (leaves 74-81).

Thesis (doctoral)--Swedish University of Agricultural Sciences, 2006. / Appendix includes reproductions of papers and manuscripts co-written with other authors; abstract of one paper also in Spanish. Includes bibliographical references. Issued also electronically via World Wide Web in PDF format; online version lacks appendix of papers.

Conservation of biodiversity is a major issue in ancient temperate rainforests of British Columbia. While significant efforts have been made to document species of birds and mammals, little is known about canopy arthropod communities in British Columbia. Microhabitats (suspended soils) within canopy systems of temperate rainforests support diverse microarthropod communities, dominated by mites of the suborder Oribatida. These oribatid mite communities are distinct from forest floor communities, contribute significantly to overall forest biodiversity, and are functionally important components of forest ecosystems. I used the suspended soil system in western redcedar trees in the Walbran Valley to study the relative importance of local environmental factors versus regional spatial factors contributing to the structure of arboreal oribatid mite communities. and compare these patterns to forest floor oribatid mite communities at the same study location. An array of sampling methods was used to complete these objectives: substrate core samples. bark scrapings, colonisation of litterbags, litterfall collection, and colonisation of artificial canopy habitats. This study identified 138 species of oribatid mites associated with ancient western redcedar trees of the Walbran Valley on Vancouver Island. The documented patterns of oribatid mite diversity in this rainforest demonstrated higher local species richness (alpha diversity) in terrestrial (forest floor) habitats, and greater beta diversity in arboreal (suspended soil) habitats. The oribatid mite community within suspended soils are formed primarily by dispersal patterns and colonisation within the canopy system. with limited colonisation from the forest floor. The factors, which shape canopy oribatid mite communities within suspended soils, are related to habitat availability, moisture limitation and random dispersal events of individual species. My results suggest the arboreal oribatid mite community experiences regional dispersal limitation associated with physical tree-to-tree dispersal barriers. However, factors other than physical dispersal barriers. such as aggregation and niche partitioning, likely also limit the local distribution of species in both arboreal and terrestrial habitats. Stochastic dispersal dynamics within the canopy are crucial to understanding oribatid mite community structure in suspended soils. yet the relative importance of regional dispersal processes is dependent on deterministic factors relating to the environmental tolerances of individual species at the local scale.

Thesis (M. A.)--University of Canterbury, 2007. / Typescript (photocopy). Includes bibliographical references (leaves 122-130). Also available via the World Wide Web.

Thesis (Ph. D.)--Oregon State University, 2010. / Printout. Includes bibliographical references (leaves 244-262). Also available on the World Wide Web.

Thesis (doctoral)--Swedish University of Agricultural Sciences, 2003. / Thesis documentation sheet inserted. Appendix reproduces five published papers and submitted manuscripts, four co-authored with others. Includes bibliographical references. Also partially issued electronically via World Wide Web in PDF format; online version lacks appendix.