Neoproterozoic-Early Cambrian continental rifting related to the breakup of the supercontinent Rodinia framed the continental margin of eastern Laurentia and the departing cratons around the opening Iapetus Ocean. The result of continental extension was the production of a zig-zag set of promontories and embayments on the eastern Laurentian margin defined by northeast-trending rift segments offset by northwesttrending transform faults. The St. Lawrence promontory defines the Laurentian margin in western Newfoundland. There, Neoproterozoic-Carboniferous clastic, volcanic, and carbonate successions record protracted continental rifting and passive-margin thermal subsidence followed by destruction of the margin during the early, middle, and late Paleozoic Appalachian orogenic cycles. Palinspastic restoration of deformed Paleozoic strata by a set of balanced cross sections resolves the structure, stratigraphy, and timing of Paleozoic tectonic events on the St. Lawrence promontory. Synrift and post-rift subsidence profiles, as well as abrupt along-strike variations in the age, thickness, facies, and the palinspastically restored extent of synrift and post-rift stratigraphy, indicate the St. Lawrence promontory was founded upon a low-angle detachment rift system. Upperplate margins, lower-plate margins, and transform faults that bound zones of oppositely dipping low-angle detachments are recognized along specific segments of the promontory. A detailed U-Pb and Lu-Hf isotopic detrital zircon study elucidates the identity of specific cratons conjugate to the St. Lawrence promontory in the pre-rift configuration of Rodinia. Approximately 510 zircons from 9 samples collected from basement and overlying Early Cambrian synrift rocks in Newfoundland were analyzed by LA-ICP-MS for U-Pb ages and Hf isotopic ratios. Synrift samples yielded ages ranging from 3605 Ma to 544 Ma with maximum age frequencies of 1000-1200 Ma (Grenville), 1350-1450 Ma (Pinware), and 2650-2800 Ma (Superior), while two basement samples yielded U-Pb ages of 1044 Ma and 1495 Ma. 177Hf/176Hf isotopic ratios of ca.1000 Ma, 1200 Ma, and 1400- 1600 Ma zircons from Newfoundland basement and synrift rocks are a close match to reported 177Hf/176Hf ratios for Baltican zircons of the same vintage, suggesting that Baltica was conjugate to the St. Lawrence promontory.

The purpose of this research was to assess the potential impact of climate change on the western Newfoundland tourism industry. Western Newfoundland was chosen as it has a variety of recreational activities that attract tourists. To this end, a mixed methods approach was deemed most appropriate. It allowed for the use of the qualitative procedures of interviews and document analysis as well as the quantitative procedures of statistical climate modeling. The qualitative research demonstrated that there was a desire for further growth in the tourism industry and a general lack of concern for the affects of climate change. The quantitative methods projected that three different recreational and tourism activities studied in this thesis could be altered by climate change. Of the tourism industries examined, snowmobiling was projected to suffer shortened seasons, skiing was projected to see slight losses or to maintain its current season length, and golf was projected to extend its season and increase the number of playable rounds. When the two methods were integrated, there was a gap between the potential changes in the tourism industry and the lack of adaptation plans from the province or the tourism sector. Based on these findings, a series of recommendations were made to the Newfoundland and Labrador Department of Tourism, Culture and Recreation and various tourism operators. This research will contribute a new perspective to the substantial existing literature on tourism, to the growing research on climate change, and to the essential research on Newfoundland and Labrador.

The purpose of this research was to assess the potential impact of climate change on the western Newfoundland tourism industry. Western Newfoundland was chosen as it has a variety of recreational activities that attract tourists. To this end, a mixed methods approach was deemed most appropriate. It allowed for the use of the qualitative procedures of interviews and document analysis as well as the quantitative procedures of statistical climate modeling. The qualitative research demonstrated that there was a desire for further growth in the tourism industry and a general lack of concern for the affects of climate change. The quantitative methods projected that three different recreational and tourism activities studied in this thesis could be altered by climate change. Of the tourism industries examined, snowmobiling was projected to suffer shortened seasons, skiing was projected to see slight losses or to maintain its current season length, and golf was projected to extend its season and increase the number of playable rounds. When the two methods were integrated, there was a gap between the potential changes in the tourism industry and the lack of adaptation plans from the province or the tourism sector. Based on these findings, a series of recommendations were made to the Newfoundland and Labrador Department of Tourism, Culture and Recreation and various tourism operators. This research will contribute a new perspective to the substantial existing literature on tourism, to the growing research on climate change, and to the essential research on Newfoundland and Labrador.

Thesis (M.A.)--Memorial University of Newfoundland, 2000. / Bibliography: leaves 170-185. Also available online.

Thesis (M. Sc.)--Memorial University of Newfoundland, 1997. / Bibliography: leaves 44-51.

The American marten (Martes americana) is associated with large tracts of relatively undisturbed, mature coniferous forests. I examined coarse woody debris (CWO) structure and small mammal abundance with respect to forest age and stem structure within second-growth forests, in comparison with old-growth stands in western Newfoundland. Results suggest that a critical change in marten habitat quality may occur at stand senescence, due to decreased tree competition, more complex subcanopy structure, and increased meadow vole (Microtus pennsylvanicus) abundance. Analysis of stem structure within a chronosequence of 19 second-growth stands indicated high intertree competition, with dense canopy closure and active self-thinning, until stand senescence at 80 years. Old-growth stands were less dense, offering more canopy openings. CWD volume observed within the chronosequence demonstrated the typical U-shaped temporal relationship observed in other forested systems. Lowest CWD volumes were observed within semimature to mature second growth. Highest levels of both CWD volume and structural complexity corresponded with stand senescence and old growth. Small mammals were sampled within immature, semimature, mature, and silviculturally overmature coniferous stands in western Newfoundland during 1993 and 1994. Meadow voles were most abundant within overmature stands (P Results from this study suggest that the critical elements of marten foraging habitat currently are found within a senescent forest stand structure. Further review of the literature and Newfoundland harvest records indicated that anthropogenic disturbance transformed a historically heterogeneous forested landscape into a more contiguous, even-aged, second-growth environment. Using the stand density management diagram, I designed a silvicultural approach to marten habitat management that simulates the structure of older forests within younger stages of forest development.