Thesis (Ph.D.)--Indiana University, School of Public and Environmental Affairs, 2007. / Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6564. Adviser: Vicky Meretsky. Title from dissertation home page (viewed May 20, 2008).

Thèse (M.Env.)--Université de Sherbrooke (Canada), 2006. / Titre de l'écran-titre (visionné le 6 mai 2008). In ProQuest dissertations and theses. Publié aussi en version papier.

Thesis (Ph.D.)--Indiana University, School of Public and Environmental Affairs, 2004. / Title from PDF t.p. (viewed Dec. 1, 2008). Source: Dissertation Abstracts International, Volume: 66-01, Section: B, page: 0177. Chair: J. C. Randolph.

Thesis (Ph.D.)--Indiana University, Dept. of Anthropology, 2005. / Source: Dissertation Abstracts International, Volume: 67-01, Section: A, page: 0232. Adviser: Patrick J. Munson. "Title from dissertation home page (viewed Dec. 12, 2006)."

Abstract not available.

Abstract not available.

Invasive alien plant species pose a serious threat to Canada's natural ecosystems. It is the thesis of this paper that sub-national laws are important tools in combatting such species that are naturalized and spreading within provincial and territorial boundaries. Weed control acts in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia, and Prince Edward Island and the plant health protection acts in New Brunswick, and Newfoundland and Labrador are a strong basis to combat invasive alien plant species. However, since these laws were enacted for weeds in agro-ecosystems, they are not up to the task of protecting natural ecosystems from invasive alien plant species. In some provinces and territories, there is a need to fill gaps in the law and ensure that it applies in a clear and uniform manner to all natural ecosystems. Numerous other revisions are recommended to make applicable provincial and territorial laws more effective.

Numerous forest fires occurred during the summer of 2004 in the Klondike Goldfields region of the Yukon Territory, an area of extensive discontinuous permafrost. More than 35 shallow detachment failure landslides developed in subsequent weeks in Steele Creek, a small drainage basin located about 60 km south of Dawson City. Preliminary observations of the failures and near-surface thermal regime were made through freeze-up of 2004 and continued in the summers of 2005 and 2006. Detachment failures were mapped and individual sites were surveyed. Air and ground temperatures were measured in burned and unburned areas. In addition, two-dimensional DC resistivity transects were used to examine subsurface conditions in the area. Forest fire contributed to detachment failure activity on permafrost slopes by destroying the surface organic mat, causing burned surface temperatures to rise, thawing active layers by up to 20 cm (+31%) deeper than unburned slopes and weakening the surface root structures. Deeper thaw melted transient layer ground ice, raising soil porewater pressures. The thermal differences between burned and unburned sites were greater at the north-facing than south-facing sites, and active layer freezing and thawing processes varied according to both aspect and burned status. More southerly-facing and/or burned sites generally thawed earlier, refroze later and had warmer temperatures than more northerly and/or unburned sites. Thaw of burned areas with high ground surface temperatures can be expected to continue, depending on climatic conditions, until sufficient revegetation occurs to shade the surface and rebuild the insulating organic mat. The detachment failures occurred from a few weeks to two years after forest fire, and only on slopes where permafrost was extensive. They were not similar to others in the literature in that almost all occurred in coarse-gained soils and had failure planes elevated above the permafrost table. These landslides were flow-type failures that rafted portions of the organic mat on top of deforming, non-cohesive sediment. They occurred in areas of deeper thaw but their distribution and the resistivity data suggest that they were associated with supra-permafrost taliks which concentrated groundwater flow. In an unglaciated area like the Klondike region this landsliding process has likely occurred thousands of times during the Pleistocene and may be responsible for elements of the form of the region's slopes. Predicted increases in the frequency and magnitude of forest fire in the boreal forest due to warming climates may increase incidence of these types of failures.

Aboriginal groups across Canada are looking for new ways to improve the living conditions of their people. Coast Tsimshian Resources LP is a forest company that is collectively owned by the Lax Kw'alaams band, a traditional fishing community in northern British Columbia. This research investigates the collectively-owned company as a possible creative means toward development, but in the process uncovers the significance of community 'embeddedness' in shaping development outcomes. Data was collected primarily through semi-structured and informal interviews with respondents from the community and company, among others. Interviews revealed the problem of a disconnection between the community and company. Through a New Institutional Analysis, which pays particular attention to context, the possible reasons for the disconnect are explored, and community 'embeddedness' is presented as a way of understanding it. Fishing is identified as a culturally salient practice and serves as a point of comparison to explain the lack of participation in the company's forestry activities. Suggestions for ways the company can work within this 'embeddedness' to ameliorate the disconnect are provided, and an elevated appreciation of the "sub-institutional elements" within New Institutional theory is suggested. Finally, the community-owned company is evaluated in terms of its ability to meet the development goals and visions of the Lax Kw'alaams band and First Nations in Canada.

Ponderosa pine delayed mortality, and bark beetle attacks and emergence were monitored on 459 trees for 3 years following one prescribed fire in Idaho and one wildland fire in Montana. Resin flow volume (ml) was measured on 145 fire-injured ponderosa pine 2 and 3 years post-fire. Logistic regression was used to construct two predictive ponderosa pine mortality models, and two predictive bark beetle-attack models. Post-fire delayed tree mortality was greater with the presence of primary bark beetles independent of diameter at breast height (DBH) (cm), and was greater in smaller diameter trees most likely due to direct effects of fire-caused injuries; mortality was lower in trees with less percent bud kill (PBK). The frequency of bark beetle attack was greater in trees with less percent bud kill and greater bole char height proportion (CHIP). Attack frequency was also greater on trees with higher percent bud kill and greater diameter at breast height. Classification tables for all predictive models were presented for application in post-fire management development. Multivariate ANOVA analyses were used to describe the effects of morphological and fire-injury variables on ponderosa pine resin production, and bark beetle attack preference and emergence. Resin production (ml) was significantly greater on burned than unburned trees. Resin flow increased significantly between June and July 1 year following fire and from June to August 2 years following fire. Resin flow was lower on the north bole aspect than the south and west aspects of unburned trees. Resin flow of burned trees significantly increased through the summer and was greatest in trees with high pre-fire live crown length (m) (LCL). Resin flow of unburned trees differed significantly by year, month, bole aspect, and live crown length. Resin increased by month and live crown length, decreased from 2005 to 2006, and was less on the northern bole aspect than all other aspects. Bark beetles preferred to attack fire-injured trees, especially within bole-scorched areas. No significant differences in bark beetle emergence were found between fire-injured and non fire-injured trees. On burned sites, beetle emergence was greatest from larger diameter trees with less severe fire injury. Western pine beetle (Dendroctonus brevicomis LeConte) had the greatest emergence from fire-injured ponderosa pine, and Ips pini (Say) had significantly greater emergence from non fire-injured ponderosa pine.