Abstract not available.

Abstract not available.

Abstract not available.

Habitat loss is the leading cause of species extinction. Protecting and managing habitat quality is vital to an organism’s persistence, and essential to endangered species recovery. We conducted an investigation of habitat quality and potential impacts from climate change to piping plovers (Charadrius melodius) breeding on the barrier island ecosystem of New York, during 2003-2005. Our first step in this analysis was to examined the relationship between two common measures of habitat quality: density and productivity (Chapter 1). We used both central and limiting tendency data analysis to find that density significantly limited productivity across many spatial scales, especially broader scales. Our analysis of plover habitat quality (Chapter 2) focused on (1) identifying the spatial scaling of plovers to their environment; (2) determining the relative importance of four aspects of the environment (land cover, predation, management, and disturbance); and (3) determining the key environmental variables that influence productivity. We found that plover habitat selection occurred within a narrow range of spatial scales that was unique to each environmental variable. Further, we found that management and predation variables influenced population-level productivity relatively more than land cover and disturbance. Environmental variables with a significant positive influence on habitat quality were land management units, plover conservation educational signs, and symbolic string fencing erected around plover nesting areas. We found a significant negative relationship among density of people on ocean beaches, herring gull density, and land cover degradation. To quantify possible impact to plover habitat from future climate change (Chapter 3), we examined the extent of habitat change resulting from different estimates of sea-level rise (SLR) and storminess over the next 100 years. We found that the particular SLR estimate, habitat response, and storm type used to model climate changes influenced the amount of potential habitat available. Importantly, we observed synergy between SLR and storms resulting in the increasing impact of SLR and storms on plover habitat over the next 100 years. Finally, we found that coastal development contributed considerably to habitat loss when combined with climate changes. Our findings raise concerns regarding current plover recovery goals and management strategies. Density-dependent productivity may threaten the goal of a joint increase in both plover population and productivity. We advocate density monitoring and allocation of alternative nesting areas to provide the relief of possible high-density limitations. Based on our analysis of habitat selection and climate change threats, we call for a shift in management focus away from known breeding areas, towards ecosystem processes. Long-term conservation of piping plover habitat quality is more likely through protecting and promoting natural barrier island dynamics (i.e. overwash and migration) and minimizing human development on the barrier islands of New York State.

The Thung Yai Naresuan (East) Wildlife sanctuary (TYNE) is clarified as the Tiger Conservation Landscape of Global Priority and also a stronghold for other endangered and threaten species. Although, UNESCO designated this area, the cores of the Western Forest Complex (WEFCOM), as a Natural World Heritage Site in 1991, this wildlife has been threatened by habitat alteration, prey depletion, and direct killing. Yet, the information on impact of human activities and wildlife status that is needed to guild forest authorities to develop conservation strategies remains challenging. The goal of this dissertation was to increase understanding of tiger, other main predators, prey status, and also impact of human activities in the sanctuary. In the TYNE, the globally endangered species were observed including Asiatic Elephant (Elephas maximus), Tiger (Panthera tigris), Malayan Tapir (Tapirus indicus), Dhole (Cuon alpines), and Malayan Pangolin (Manis javanica). Spatially explicit capture-recapture approach estimated tiger density at 1.4-1.6 tigers/100 km2 and leopard density at 0.7-0.8 leopards/100 km2, which indicates that there might be 27±10 tigers (95% CL range from 11-46) and around 12±4 leopards (95% CL range from 8-19) roaming in the area around 1,596 km2 in TYNE. The large predators like tigers, leopards, and dholes co-occurred in the area with the combination of both spatial and temporal partitioning due to differences in predator and prey activity and low overlap in space use correlated to their prey preferences. Prey availability, human settlement areas, and human disturbance activities are the key limiting factors for their distribution and space-use. The habitat use of tiger and leopard demonstrated that the population distribution was limited in the central to the eastern part of the TYNE, while the local people occupied the west with high disturbance activities. The activities by local people in TYNE were varied and the impacts of the disturbance were complex. Slash and burn, livestock, tree cutting, and poaching appeared to be the major influence wildlife abundance and habitat around the settlement areas. The results of this study stress the need for the further conservation and management to maintain wildlife distribution and populations in the future. Better scientific understanding of wildlife biology, ecology, and social sciences would help to deal with the conservation and management issues facing the local communities and natural resources in Thung Yai Naresuan (East) Wildlife Sanctuary.

Maintaining flows and quality of water resources is critical to support ecosystem services and consumptive needs. Understanding impacts of changes in climate and land use on ecohydrologic processes in a watershed is vital to sustaining water resources for multiple uses. This study completes a continental and regional scale assessment using statistical and simulation modeling to investigate ecohydrologic impacts within watershed systems. Watersheds across the continental United States have diverse hydrogeomorphic characters, mean temperatures, soil moistures, precipitation and evaporation patterns that influence runoff processes. Changes in climate affect runoff by impacting available soil moisture, evaporation, precipitation and vegetative patterns. A one percent increase in annual soil moisture may cause a five percent increase in runoff in watersheds across the continent. Low soil moisture and high temperatures influence runoff patterns in specific regions. Spring runoff is increased by the influence Spring soil moisture, Winter and Spring evaporation, and Winter and Spring evaporation. Spring runoff is decreased by increases in Winter and Spring temperatures and increases in the vegetation index. Winter runoff is affected by maximum vegetative index, temperature, soil moisture, evaporation and precipitation. Contributing factors to runoff are influenced by geomorphic and seasonal variations requiring strategies that are site-specific and use system-wide information. Regional scale watershed analysis investigates the influence of landscape metrics on temporal streamflow processes in multiple gauged watersheds in Massachusetts, U.S.A. Time of concentration, recession coefficient, base flow index, and peak flow are hydrologic metrics used to relate to landscape metrics derived using FRAGSTAT software. Peak flow increases with increasing perimeter-area fractal dimensions, and Contagion index and decreases as Landscape Shape Index increases. There was an increasing trend in the fractal dimension over time indicative of more complex shape of patches in watershed. Base flow index and recession coefficient fluctuated from low to high decreasing recently. This could be indicative of open space legislation, conservation efforts and reforestation within the state in the last ten years. Coastal systems provide valuable ecosystem services and are vulnerable to impacts of changes in climate and continental land use patterns. Effects of land use and climate change on runoff, suspended sediments, total nitrogen and total phosphorus are simulated for coastal watersheds around the Boston Bay ecosystem. The SWAT (Soil and Water Assessment Tool) model, a continuous-time, semi distributed, process-based model, is used to simulate the watershed ecohydrologic process affecting coastal bodies. Urbanization in watersheds increased runoff by as much as 80% from the baseline. Land use change poses a major threat to water quality impacts affecting coastal ecosystems. Total nitrogen increased average of 53.8% with conservative changes in climate and land use. Total phosphorus increased an average of 57.3% with conservative changes in land use and climate change. Climate change alone causes up to 40% increase in runoff and when combined with a 3.25% increase in urban development runoff increased an average of 114%. Coastal ecosystems are impacted by nutrient runoff from watersheds. Continued urbanization and changes in climate will increase total nitrogen, total phosphorus and suspended sediments in coastal ecosystems. Continental scale runoff is affected by soil moisture and vegetative cover. Cover crops, low tillage farm practices and natural vegetation contribute to less runoff. Developing policies that encourage protection of soil structure could minimize runoff and aid in maintaining sustainable water resources. Best Management Practices and Low impact development at the national level with continued stormwater legislation directed towards sustainable land use policy will improve water quantity and quality. Fragmentation observed in Massachusetts increases the number of urban parcels and decreases the size of forested areas. Faster runoff patterns are observed but recent land management may be changing this runoff pattern. Municipal and state zoning ordinance to preserve open space and large forest patches will restrict urban growth to specific regions of a watershed. This could improve quantities of water available to ecosystems. Increases in total nitrogen, phosphorus and suspended sediments to coastal ecosystems can be minimized with use of riparian buffers and Best Management Practices within coastal watersheds. Urbanization and climate change threatens coastal ecosystems and national policy to preserve and restrict development of coastal areas will preserve coastal ecosystem services.

Across the country, government agencies, NGOs and communities are coming together to manage their forests to reduce the risk of wildfire in the wildland urban interface. However, to have long-term impacts, communities must have the foundation necessary to continue these efforts after special programs have moved on or outside funding has been exhausted. Social capital may be one important component in sustaining wildfire preparedness as actions to increase wildfire preparedness are affected by decisions made at the individual and the community level. This study focuses on the essential components of social capital that are crucial in affecting community participation in wildfire preparedness and mitigation. In order to understand these relationships, a pilot study was developed to explore how perceptions of community preparedness efforts vary geographically in different ecosystems, forest types and USDA Forest Service regions at the national scale. Additionally, the study explores differences in perceptions of community preparedness between stakeholder groups, such as residents, fire officials, land managers, business/community leaders, and environmental advocates. Since preparedness involves both individual actions at the residential scale, as well as community actions such as planning and zoning, separate survey instruments were developed for local residents and community and government agency leaders. The study also analyzed the effect of variables like place attachment, past experience and previous involvement with wildfires, length and type of stay in the community, and affiliation with local organizations on creation or enhancement social capital as well as wildfire preparedness in the community in terms of change in defensible space actions, and change in people’ attitudes, understanding and outlook towards mitigation efforts over the years. This research has incorporated a mixed methods approach integrating both quantitative and qualitative research techniques because of the dual aspect of the research questions regarding the measure of social capital as well as the level of preparedness in the communities. Results from the pilot study conducted in six communities across the United States are discussed as the final outcome of this larger national scale project. Ultimately, the study provides insights about the underlying community variables that influence community preparedness actions and awareness about wildfire.

The shift from centralised conservation to Community-Based Natural Resource Management (CBNRM) was the highlight of the conservation discourse across the world during the late 1980s and early 1990s. CBNRM efforts were believed to have the potential of successfully merging biodiversity conservation simultaneously with local development efforts. However, the increasing critiques against the applicability of CBNRM interventions in different contexts is threatening the viability of the approach. Extant literature on CBNRM interventions focuses on the theoretical aspects of such efforts at the expense of the practical and context specific elements. This thesis intends to fill such a gap in literature by focusing on the practical and contextual elements of an example of this approach in Zanzibar. In an attempt to conserve the isles' natural forests, Zanzibar has adopted Community-Forest Management Areas (CoFMAs) bordering its natural forests. In this study, focus is placed on Pete's CoFMA, a village bordering the isles' last remaining natural forests- Jozani-Chwaka Bay National Park (JCBNP). Pete provides an ideal site due to the conflict that exists between residents and the CoFMA intervention. By using the political ecological framework, this study is able to examine the political, social, historical and economic elements that play a significant role in the practice of CBNRM efforts. Narratives from residents are relied on to elucidate on such elements in relation to the existence of the CoFMA in Pete Village. Narratives gathered through interviews and participant observation concluded that while CoFMAs have been set up with the optimistic goal of conserving the forest and providing development to community members; in practice, the conservation intervention has proved otherwise. In spite of the achievement of some developmental goals, the overall findings indicate that the CoFMA has failed to protect the forests and its natural resources from degradation. At the same time, community members are facing difficulties to live a sustainable life.

Sumatran elephant (Elephas maximus sumatranus) continue to decline due to habitat loss, poaching and conflict with humans. Yet, developing effective land conservation strategies for elephants is difficult because there is little information available on their foraging ecology, habitat use, movements and home range behaviors. Using the lead animal technique, 14 free-ranging, tame elephants at the Seblat Elephant Conservation Center (ECC) were observed for 4,496 hours to describe their foraging ecology and diet. The majority of their daily activity was feeding (82.2 ± 5.0%), followed by moving (9.5 ± 4.0 %), resting (6.6 ± 2.1%) and drinking (1.7 ± 0.6%), and individual activity budgets varied among individuals for all activities. At least 273 plant species belonging to 69 plant families were eaten by elephants and five plant families of Moraceae, Arecaceae, Fabaceae, Poaceae, and Euphorbiaceae were most commonly consumed. Elephants browsed more frequently than grazed, especially in the wet season. Levels of crude protein, calcium, phosphorus and gross energy in plants eaten by elephants in Seblat appeared adequate for meeting the nutritional requirements. Home range size of an adult female elephant in the SECC during 2007–2008, was 97.4 km2 for the MCP and 95.0 km2 for the 95% fixed kernel. There were no relationships between average monthly elephant home range sizes or movement distances with rainfall. Distances to rivers and ex-logging roads had little effect on elephant movements, but vegetation productivity, as measured by the Enhanced Vegetation Index, did affect elephant movements. We used resource selection and compositional analysis habitat ranking approaches to describe adult female elephant habitat use in the SECC. The elephant used medium canopy and open canopy forests more than expected; however, during the day closed canopy forests were used more than at night. Locating and capturing wild elephants in tropical rainforest environments are difficult and high-risk tasks. However, using tame elephants improves the search efficiency of finding wild elephants in dense forests and reduces risks to staff and target elephants. Use of experienced veterinarians and standing sedation techniques also greatly reduce the risks of elephant injury while immobilizing elephants.

No description available.