Thesis (Ph. D.)--University of Sydney, 2008. / Title from title screen (viewed 20 October 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the CoCo Research Centre, the Centre for Research on Computer Supported Learning and Cognition, Faculty of Education and Social Work, University of Sydney. Degree awarded 2008; thesis submitted 2007. Also available in print form.

Information was collected in 1967 from 1116 visitors to some mountain parks in British Columbia and Alberta regarding their preferences, knowledge and interest in the kind and condition of the surrounding forest habitat. Data concerning visitor characteristics such as socioeconomic standing, camping experience, age, sex, regional origin, level of education, type of equipment used (tents, trailers or campers) and reasons for selecting the campground were also recorded. Because of the difficulty quantifiable nature of the data, analyses had to be done using only tests of independence and simple correlations of the observed frequencies. It was found that most park visitors were travellers staying overnight, then moving on, rather than camping for several days. Two-thirds of them were able to recognize the common tree species of the parks, but their preferences regarding forest habitat were weak and vague. Those who were well satisfied with the facilities and the general conditions of the campground tended to prefer some particular feature of the local forest. The firm opinions and strong preferences of the small group of wilderness enthusiasts reported in other surveys were not found among the park visitors sampled in this study. / Forestry, Faculty of / Graduate

No description available.

No abstract available. / Thesis (M.Env.Dev.)-University of Natal, Pietermaritzburg, 2003.

Typescript. / Thesis (Ph. D.)--University of Hawaii at Manoa, 1984. / Bibliography: leaves [259]-275. / Photocopy. / Microfilm. / xvii, 275 leaves, bound ill., maps 29 cm

published_or_final_version / Ecology and Biodiversity / Doctoral / Doctor of Philosophy

published_or_final_version / Environmental Management / Master / Master of Science in Environmental Management

published_or_final_version / Environmental Management / Master / Master of Science in Environmental Management

Microphytobenthos are the dominant primary producers on estuarine mudflats playing a key role in the functioning of the ecosystem. Studies into microphytobenthic ecology have previously been limited by scale but the advent of fine scale analysis techniques (gm) as well as non-destructive sampling has enabled the system to be examined at a level not previously possible. This study examined the formation, structure and function of microphytobenthic biofilms using non-destructive (remote sensing by PAM fluorescence; fibreoptic light microprofiling) and destructive (cryo-freezing and Low temperature scanning electron microscopy) sampling. Many microphytobenthic organisms are motile and have evolved complex migratory strategies. Microphytobenthic migratory patterns are widely described but much remains to be elucidated about the controlling factors. The fluorescence parameter F015 (minimum fluorescence yield after 15 minutes dark adaptation) was used to monitor short-term changes in biomass at the sediment surface. Light, tidal state, endogeny and combinations thereof were all shown to control migration, demonstrating that predictable migratory rhythms cannot be assumed. Microscale sectioning showed that chlorophyll a was always concentrated in the top 400 gm (the photosynthetically active biomass). Clear migratory patterns were not detected using microscale sectioning therefore indicating that migration occurs over a scale < 400gm. Despite no changes in the chlorophyll a content in the surface layers, LTSEM analysis demonstrated diurnal taxonomic shifts providing circumstantial evidence that microphytobenthic cells sub-cycle at the sediment surface to optimise fitness. The light extinction co-efficient (k) of microphytobenthic biofilms significantly vaned with site, assemblage and also over time. 90% of the surface PPFD had always been attenuated by 400, and in many cases before 200. Traditional microphytobenthic primary productivity models do not account for changes in the spatial and temporal distribution of biomass or light attenuation and therefore their applicability to the real situation may be limited.

No description available.