• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 406
  • 297
  • 124
  • 63
  • 35
  • 25
  • 18
  • 14
  • 9
  • 9
  • 8
  • 7
  • 6
  • 5
  • 4
  • Tagged with
  • 1186
  • 673
  • 270
  • 252
  • 243
  • 240
  • 187
  • 163
  • 140
  • 131
  • 127
  • 115
  • 114
  • 111
  • 102
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

A Geographic Information System Approach to Determine Connectivity between Duck Mountain Provincial Park and Forest and Riding Mountain National Park, Manitoba

Chan, Godwin T. 18 January 2013 (has links)
Four geographic information system methods were applied to determine connectivity and fragmentation for a corridor from Riding Mountain National Park to Duck Mountain Provincial Park and Forest. Least-cost path modelling showed that presently there is no corridor of continuous forest or corridor of undeveloped land between these two areas, of which developed land appears to fragment all possible paths. Maps generated from spatial graphs and least-cost path modelling show that undisturbed land and forest is concentrated in the western Bluewing Corridor. Due to its greater connectivity, the Bluewing corridor is the preferred route for a corridor between these conservation areas.
92

Governance of Protected Areas in the Serengeti Ecosystem, Tanzania

Kisingo, Alex Wilbard 17 September 2013 (has links)
The purpose of this dissertation is to assess the contribution of protected areas (PAs) to the attainment of both conservation and social outcomes including poverty reduction within the Greater Serengeti Ecosystem in Tanzania. The research focused on the role of governance as a factor influencing the attainment of these goals. This research was carried out in the Serengeti, Ngorongoro and Meatu districts of Tanzania in 2012. Two villages were selected from each district using stratified sampling techniques to obtain villages bordering many PAs including the core PA (i.e. Serengeti National Park). A mixed methods approach was used in this research which comprised of quantitative interviews with 389 households, key informants interviews with 88 stakeholders, 12 focus group discussion and document analysis. The study used a quantitative questionnaire to measure the effectiveness of governance as perceived at the household level. The questionnaire yielded 10 governance factors that accounted for 85% percent of the explained variance using factor analysis. The findings indicated weak governance particularly for Ikorongo-Grumeti Game Reserve. When examined across the ecosystem, weak linkages were evident between the PA actors and other actors such particularly at local community level. There was no difference in governance scoring between community-based PAs and the more traditional top-down government owned PAs. Furthermore, local communities were not adequately represented in PA governance despite being important actors. Findings indicated mixed results in terms of conservation and social outcomes. Results indicate implied relationship between mixed outcomes and weak governance with weak outcomes thought to be related to weak governance. This study recommends adaptations in the Serengeti ecosystem particularly the re-engineering of the ecosystem governance structure to bring on-board more actors in decision-making and management processes and actions through increased linkages between governance actors, governance structures and processes. / Graduate / 0366 / 0768 / 0478 / akisingo@mwekawildlife.org
93

Establishment of High Seas Marine Protected Areas: Towards an Implementing Agreement?

Boisvert, Marie-Claude 16 December 2009 (has links)
Although international law requires States to protect the marine environment and conserve marine living resources, human activities are still threatening marine species and its survival. In view of limited scientific knowledge of marine ecosystems, fragility of ecosystems and insufficient mechanisms of protection, marine biodiversity in areas beyond national jurisdiction is at risk. Increasing attention has been given to the need to conserve this important and vulnerable biodiversity. The international community has begun to recognize the importance of marine protected areas (MPAs) as key tool to ensure sustainable use and preservation of biodiversity. However, the adequacy of the current legal framework related to the conservation of marine biodiversity through the establishing of high seas MPAs raises debates. Disagreements about the existence of inadequacies and need for an implementing agreement remain. My study seeks to determine whether the international legal framework is adequate for the establishment of MPAs or whether further measures are required.
94

Moose (Alces alces) Movement and Space Occupancy within Their Home Range in Southern Ontario

Ung, Ricardo 31 May 2011 (has links)
As land-use change threatens wildlife viability, the understanding of how animals move through spatially fragmented landscapes has important implications for the long-term persistence and management of species. This research compares moose movement and space-use patterns between Algonquin Provincial Park (20 moose) and Wildlife Management Unit 49 (17 moose) in southern Ontario from 2006 to 2008. Moose were found to be using areas in the home range that are not normally used more often in the park relative to the management unit, and that there are signs, although not significant, that the use of land covers between the two locations may be diverging. These differences are likely driven by the differences in predator and road densities between the two locations. I interpret these findings to suggest that Algonquin Provincial Park is protecting moose from the impacts of roads, but that moose can survive in the road-fragmented landscapes if there is enough habitat available.
95

Establishment of High Seas Marine Protected Areas: Towards an Implementing Agreement?

Boisvert, Marie-Claude 16 December 2009 (has links)
Although international law requires States to protect the marine environment and conserve marine living resources, human activities are still threatening marine species and its survival. In view of limited scientific knowledge of marine ecosystems, fragility of ecosystems and insufficient mechanisms of protection, marine biodiversity in areas beyond national jurisdiction is at risk. Increasing attention has been given to the need to conserve this important and vulnerable biodiversity. The international community has begun to recognize the importance of marine protected areas (MPAs) as key tool to ensure sustainable use and preservation of biodiversity. However, the adequacy of the current legal framework related to the conservation of marine biodiversity through the establishing of high seas MPAs raises debates. Disagreements about the existence of inadequacies and need for an implementing agreement remain. My study seeks to determine whether the international legal framework is adequate for the establishment of MPAs or whether further measures are required.
96

Moose (Alces alces) Movement and Space Occupancy within Their Home Range in Southern Ontario

Ung, Ricardo 31 May 2011 (has links)
As land-use change threatens wildlife viability, the understanding of how animals move through spatially fragmented landscapes has important implications for the long-term persistence and management of species. This research compares moose movement and space-use patterns between Algonquin Provincial Park (20 moose) and Wildlife Management Unit 49 (17 moose) in southern Ontario from 2006 to 2008. Moose were found to be using areas in the home range that are not normally used more often in the park relative to the management unit, and that there are signs, although not significant, that the use of land covers between the two locations may be diverging. These differences are likely driven by the differences in predator and road densities between the two locations. I interpret these findings to suggest that Algonquin Provincial Park is protecting moose from the impacts of roads, but that moose can survive in the road-fragmented landscapes if there is enough habitat available.
97

Transboundary Regional Planning Collaboration for Climate Change Adaptation: A Case Study of Jasper National Park, Mount Robson Provincial Park, and Willmore Wilderness Park.

O'Neill, Natasha Anna January 2011 (has links)
Climate change threatens the integrity of many parks and protected areas worldwide. Mountain parks are amongst the most vulnerable, facing changes in temperature, hydrology, glaciation, fire frequency, and pest and disease outbreaks. Species migration is a key tool in climate change adaptation, but often physical and jurisdictional fragmentation makes it impossible for species to migrate, putting species at risk of extirpation or extinction. Transboundary collaboration and regional planning are tools that can help physically connected parks and protected areas overcome jurisdictional fragmentation and allow for species migration, giving species a greater chance at being able to adapt to climate change. However, there are many barriers to transboundary collaboration and regional planning that makes this difficult to achieve. This research aims to address the challenges parks face with regards to transboundary collaboration and regional planning, and provide possible solutions for overcoming these challenges. A qualitative research project was conducted to determine the state of transboundary collaboration and regional planning in the Canadian Rocky Mountains, using Jasper National Park, Mount Robson Provincial Park, and Willmore Wilderness Park as the study area. A document review, questionnaire, and Importance-Performance Analysis were conducted to determine: the current policy within the Parks Canada Agency, British Columbia Parks, and Alberta Parks in regards to the management implications of climate change; the degree to which transboundary collaboration and regional planning are occurring in and around the study area with regard to climate change; the challenges parks face with regards to transboundary collaboration and regional planning; how these challenges should be addressed; and to determine what park agencies and managers need to be able to participate in transboundary collaboration and regional planning. Ultimately, it became clear that while transboundary collaboration is a potentially effective tool for climate change adaptation, little transboundary collaboration is occurring within the study area. In order for this to occur, all parks must have appropriate legislation, policies, and plans in place; British Columbia Parks has these, but both Parks Canada and Alberta Parks do not. Parks planners and managers are not able to put priority on transboundary collaboration until it is mandated within the management plans. However, parks managers are supportive of transboundary collaboration for climate change and it seems likely that the parks will use this tool as it becomes increasingly necessary over the next 25 years.
98

Managing for Ecosystem Resilience in Fathom Five National Marine Park, Lake Huron, Canada

Parker, Scott Robert 15 April 2013 (has links)
Protected areas are considered to be the cornerstone of biodiversity conservation strategies and are valued sources of human well-being and ecosystem services. Yet they are not immune to the unprecedented impacts being felt worldwide. As an example, increased human activity, including development, transport of invasive species, and contributions to climate change, are transforming protected areas within the Laurentian Great Lakes into new and novel ecosystems. It is in this context of uncertainty that I explored the practice of managing for resilience. Canada’s first national marine conservation area, Fathom Five National Marine Park in Lake Huron, functioned as the study area. Besides profound and complex ecosystem change, Fathom Five is also experiencing governance challenges in the form of tangled responsibilities and issues of legitimacy. The resilience-based approach recommended elements that strengthened the capacity of the park to cope with and recover from disturbance and maintain its defining structures, functions, and feedbacks. This included a reduction of vulnerabilities (e.g., limit exposure to coastal fragmentation, manage disturbance regimes, and maintain functional and response diversity), an increase in adaptability (e.g., need to foster social learning, innovation, and improved governance structures), and an ability to navigate change (e.g., better express desired state, identify thresholds, and influence transformations), within established management practices. More specifically, methods to make spatial planning and monitoring more operational and resilience-based, were developed. For spatial planning, the decision-support tool Marxan with Zones was utilized and demonstrated how themes of representivity, replication, and connectivity could be applied in a resilience-based zoning context. For monitoring, a multivariate distance-based control chart method was developed to detect a decrease in resilience of the parks coastal wetland fish communities. Although an increase in variability was observed, a regime shift was not reported during the years investigated (2005-2012). In summary, the thesis provided an original contribution to science by examining the uncertainties and complexities facing a freshwater protected area and reframing practical conservation solutions through a resilience lens.
99

Adequacy of existing protected areas in conserving biodiversity at global and regional levels in relation to socio-economic conditions.

Gaika, Lindiwe. January 2005 (has links)
<p>At a meeting of worl leaders at the United Nations Conference on Environment and Development in Rio de Janeiro in 1992, it was recognized that because of the tremendous increase in the size of the global populations (which now is estimated to exceed six billion), there were concerns that global biodiversity was at risk if insufficient land were not put aside for conservation within formal Protected Areas. The primary aim of this study was to compare investment in Protected Areas in relation to socio-economic conditions at global and regional levels.</p>
100

Limitations to plant root growth in highly saline and alkaline bauxite residue

Kopittke, P. M. Unknown Date (has links)
No description available.

Page generated in 0.0711 seconds