A number of technical approaches had to be employed within the planner, namely, 1) translating expected reward into a probability of goal satisfaction criterion, 2) monitoring belief states with a Rao-Blackwellized particle, and 3) employing Rao-Blackwellized particles in the McLUG probabilistic conformant planning graph heuristic. POND-Hindsight is an action selection mechanism that evaluates each possible action by generating a number of lookahead samples (up to a xed horizon) that greedily select actions based on their heuristic value and samples the actions' observation; the average goal satisfaction probability of the end horizon belief states is used as the value of each action.

The purposes of this research were 1) to understand what stakeholders in one nature center are "thinking"about the focus of their center and the niche it occupies; 2) to characterize the role of one nature center in its local community; 3) to examine the nature center in terms of established characteristics of a "best" nature center; 4) to compare stakeholder perceptions with perceptions of directors of exemplar nature centers and environmental education organizations; and 5) to characterize visitor and member stakeholder perceptions and motivations in terms of the extrinsic value of ecosystem services, bioeconomics, versus the intrinsic value of nature, biophilia. This research was conducted utilizing case study methodology with mixed method data collection. Ijams Nature Center visitors and members were surveyed concerning the value of nature; structured interviews were administered to Ijams Nature Center employees, nationally recognized nature center and environmental organization directors. Visitors‘ perceptions of nature focused on the natural surroundings of the nature center, providing opportunities to watch wild animals, appreciate nature, and feel at peace. Nature center member perceptions of nature reflected the concepts of stewardship and advocacy fostered by the Center‘s conservation mission, education programs, and preservation activities. Participants shared common thematic concepts for the role of nature centers and the characteristics of a best nature center. A best nature center was characterized as a composite of factors, practices, and perspectives that merge to form a business plan reflective of best practice guidelines. Participants highlighted the unique quality of centers and the passion and vision that guides development and the roles played by nature centers in their local communities, as identified in this study, i.e., education, advocacy, and immediacy. Ijams Nature Center visitors and members valued nature differently in terms of bioeconomics and biophilia, but both groups rated the biophilic value of nature of greater importance, with differing constructs reflective of that value.

Understanding the potential for karst aquifer contamination by sediment-sorbed pesticides is important for cave conservation efforts in agricultural landscapes. Flow rate, water quality parameters and suspended sediment concentrations were measured in Logsdon River, a ~10km karst conduit within the Turnhole Spring Groundwater Basin of Mammoth Cave National Park to determine characteristics of storm-period transport of sediment-sorbed atrazine through a conduit-flow karst aquifer. Analysis of two independent precipitation events occurring in the Spring of 2008 from May 2-4 and May 27-29 demonstrated the rapid response of the Logsdon River to precipitation events with detections of atrazine increasing during the initial turbidity peak and decline in spC, indicating that the atrazine arrives with the initial flush of surface waters that enters the conduit. Distinct peaks of atrazine did not coincide with fine grained (silt and clay-sized) sediment peaks and concentrations of atrazine remained elevated on the falling limb of the hydrograph as turbidity declined. In addition, no systematic relation between filtered and unfiltered samples was evident. There was also exceedingly weak correlation between the concentration of atrazine and suspended sediment, suggesting that if atrazine is sorbed to fine sediment particles this sorption involves only the fractions finer than 0.22 μm.

For several decades following its independence from Great Britain, Ghana’s policies continued to promote over-extraction of natural resources to the detriment of its economy and rural communities. Agricultural and forestry policy has gradually evolved to foster more sustainable and equitable practices, as in building partnerships with the private sector to fund infrastructure improvements. Policy has recently recognized the dire need to adopt agricultural practices and means of forest resource extraction that are compatible with ecological stewardship. However, many shortcomings are still apparent. Large logging operations completely disregard forestry regulations with impunity, whereas rural sustenance extractors are severely punished in the rare event that policy is actually enforced. Although the severe disadvantages that agricultural policies had imposed in the 1960s have been partially alleviated, much improvement is still needed. Recent agricultural policy has recognized the lack of funding available to invest in more efficient and higher-yielding agricultural practices, but partnerships with the actual lending institutions do not exist. The scarcity of crucial inputs, such as fertilizer and technical assistance remains a major problem in the agricultural sector, as the soils are becoming rapidly depleted, leading to declining crop yields and further encroachment on the 20 percent of forests remaining. Overly ambitious targets and unrealistic policies require more careful and detailed formulation so that Ghana’s resources can be managed effectively before famine sweeps the food-insecure country once more.

As discussed in the National Parks Service’s (NPS) Directors Orders/Natural Resources Management Reference Manual #77 and the 2006 NPS Management Policy Handbook, implementing a management plan specifically for cave and karst resources within a national park is paramount to afford these resources appropriate protection. With support from the Federal Cave Resources Protection Act and the National Park Service Organic Act of 1906, management actions protecting caves has begun to place significant importance outside the traditional cave environment onto a broader karst landscape. The need to understand and protect the karst environment and caves as a karst resource has taken a much larger role in the scientific literature and has increased interest in its federal management application. Proactive management through the use of holistic karst wide management plans and programs is shown to provide superior measures for resource protection when compared to the shortcomings associated with reactive cave focused management. The use of Great Smoky Mountains National Park (GRSM) as a case study supports the need to develop and implement a proactive cave and karst management plan specific to their resources. Management decisions with regards to cave and karst resources currently follow the park's general directives and Superintendent's Compendium. GRSM’s caves and karst areas represent unique resources, such as extensive vertical relief and rare biota, requiring special management in order to effectively protect them and to manage those who study and recreate within them. Characteristics such as these necessitate holistically addressing management of these resources.

Karst regions are composed of soluble rock, often limestone, which leads to the formation of fissures, sinkholes and water flow conduits such as caves. Pollutants in karst waters tend to be quickly directed and concentrated into these subsurface conduits. As a result of this and other factors, water resources are especially sensitive to contamination and pollution in karst areas. Pollutant concentrations going into fluvial systems travelling through the subsurface in karst areas are often very similar to the concentrations arriving at outlets such as springs. Areas connected by karst conduit flows must be distinctly determined and special attention should be given to water quality impacts from land-use practices near conduit inputs. The climate which affects a certain karst area can also have different impacts on water resources considerations. For example, in the temperate climate of Kentucky precipitation is essentially even in distribution throughout the year. In contrast, southwest China is affected by a monsoon climate with high precipitation in the spring to summer and drier conditions in other seasons. In the wet season large storm pulses can effectively transport contaminants to water sources resulting in loads that can be unhealthy for frequent human consumption in drinking water. The dry seasons can be particularly severe in karst areas as water quickly drains to the subsurface, making water access a major hardship. The research for this study focused on the seasonal influences that the climate of southwest China poses for water quality, including differences in pesticide concentrations between agricultural and residential areas hydrologically linked by karst conduits. In late 2007 the fluvial connections in a simple karst system near Chongqing were confirmed using dye tracing techniques. Once these connections were established and the flow of the subterranean stream was assessed, the transport of agricultural runoff in the system was studied. Data loggers were used to record continuous data of the water conditions, including nitrate concentrations. The pesticides in the agricultural runoff entering and exiting the subterranean stream were quantified using ELISA methods. The concentrations were found to be within safe limits for drinking water. The hypothesis that there is a close relationship between concentrations of the pesticides glyphosate, chlorothalonil, and triazines in the input and the output of the system was supported by the results. When considering the hydrology and water chemistry data of the site, along with the water samples tested for pesticides, non-parametric statistical testing showed the correlations between these factors to be significant with p<0.01. The percent difference between the input and the output concentrations of glyphosate, chlorothalonil, and triazines were 31, 43, and 57% respectively. Taking into account the rapid and direct flows in this karst system, the concentrations of the pesticides found in the output were more similar to the input than would be expected in a surface stream. This suggests that there are fewer natural remediation effects reducing contamination in subsurface karst rivers of southwest China than in surface rivers. Therefore, these systems should be handled with extra attention to possible contamination of water resources. The research was conducted in the spring and summer of 2007-2008 and funded by the U.S. Agency for International Development.

The objectives of this study were to measure injuries and impairments directly observed from gags Mycteroperca microlepis caught and released within a large-scale recreational fishery, develop methods that may be used to rapidly assess the condition of reef fish discards, and estimate the total portion of discards in the fishery that suffer latent mortality. Fishery observers were placed on for-hire charter and headboat vessels operating in the Gulf of Mexico from June 2009 through December 2012 to directly observe reef fishes as they were caught by recreational anglers fishing with hook-and-line gear. Fish that were not retained by anglers were inspected and marked with conventional tags prior to release. Fish were released in multiple regions over a large geographic area throughout the year and over multiple years. The majority of recaptured fish were reported by recreational and commercial fishers, and fishing effort fluctuated both spatially and temporally over the course of this study in response to changes in recreational harvest restrictions and the Deepwater Horizon oil spill. Therefore, it could not be assumed that encounter probabilities were equal for all individual tagged fish in the population. Fish size and capture depth when fish were initially caught-and-released also varied among individuals in the study and potentially influenced recapture reporting probabilities. The Cox proportional hazards regression model was used to control for potential covariates on both the occurrence and timing of recapture reporting events so that relative survival among fish released in various conditions could be compared. A total of 3,954 gags were observed in this study, and the majority (77.26%) were released in good condition (condition category 1), defined as fish that immediately submerged without assistance from venting and had not suffered internal injuries from embedded hooks or visible damage to the gills. However, compared to gags caught in shallower depths, a greater proportion of gags caught and released from depths deeper than 30 meters were in fair or poor condition. Relative survival was significantly reduced (alpha (underline)<(/underline)0.05) for gags released in fair and poor condition after controlling for variable mark-recapture reporting rates for different sized discards among regions and across months and years when individual fish were initially captured, tagged and released. Gags released within the recreational fishery in fair and poor condition were 66.4% (95% C.I. 46.9 to 94.0%) and 50.6% (26.2 to 97.8%) as likely to be recaptured, respectively, as gags released in good condition. Overall discard mortality was calculated for gags released in all condition categories at ten meter depth intervals. There was a significant linear increase in estimated mortality from less than 15% (range of uncertainty, 0.1-25.2%) in shallow depths up to 30 meters, to 35.6% (5.6-55.7%) at depths greater than 70 meters (p < 0.001, R2 = 0.917). This analysis demonstrated the utility of the proportional hazards regression model for controlling for potential covariates on both the occurrence and timing of recapture events in a large-scale mark-recapture study and for detecting significant differences in the relative survival of fish released in various conditions measured under highly variable conditions within a large-scale fishery.

This study employs ethnographic research to investigate the extent to which local governance affects both poverty and natural resources management in the Delta region. The research develops a framework for governance of natural resources to understand the daily practices of different actors within the local context using informal observation and interviews. In applying the framework, the study places emphasis on resources for governance, actors' agency, arrangements of access to resources and governance outcomes in the Delta region. Evidence from the study shows that while the state and corporate actors only contextualise resources in terms of economic value, local actors interprete resources beyond economic value to incorporate symbolic and socio-culturally constructed values linked with historic values. The study also identified relational, routine practices and structural factors which differently shape actors' agency for resources management. The context which shapes different arrangements of access to local resources by actors varies. These arrangements are subject to negotiation, power differences and socio-cultural factors. The findings related to governance outcomes reveal both positive (favourable) and negative (unfavourable) outcomes for the livelihood of different actors. The study concludes by exploring implications for local governance in order to address poverty and enhance optimal resource management in the Delta region.

Community Based Natural Resource Management (CBNRM) programmes are implemented to ensure sustainable use and protection of the environment through appropriate capacity enhancement and empowerment mechanisms. CBNRM is an approach that has multiple objectives, such as enhancing the capacity, of communities to manage resources sustainably, and creating employment opportunities to enhance livelihoods of the communities. CBNRM programmes are implemented in South Africa by different government departments and organisations to achieve these objectives. Despite such interventions, communities often display insufficient knowledge and capacity necessary for effective participation in addressing natural resource management issues. The main objective of this study was to establish the effect of a CBNRM programme on the capacity of the KwaPitela community to manage natural resources for sustainable use. To address the main objective of this study, three sub-objectives were identified: firstly, to determine the community members’ ability to apply skills and knowledge in the management of natural resources for sustainable use; secondly to determine the community’s ability to participate with different stakeholders in the management of natural resources; and thirdly determine the community’s ability to make decisions about the management of natural resources for sustainable use. A basic qualitative research design was used and data collection methods included semi-structured interviews and focus group discussions. Selected documents were analysed to confirm specific aspects of the qualitative data. The participants of this study were the KwaPitela development committee, members of the community, and stakeholders mandated to equip the KwaPitela community in CBNRM competencies. Regarding the first sub-objective it was evident that the development committee can apply planning, networking, and leadership skills as a result of the CBNRM programme. The development committee and members involved in the harvesting of natural resources displayed knowledge related to invasive alien species, legislative processes, and the importance of natural resources as an essential for their livelihood. These skills and knowledge were, however, not applied by the community members who were not involved in natural resource management and leadership processes. The development committee and members of the community are still in need of further skills and knowledge, for example entrepreneurship skills and knowledge on how to sustain projects, in order to successfully implement the land use management plan, as developed during the CBNRM programme. Meeting the second sub-objective, it was evident that the development committee had the capability to facilitate participation with stakeholders, but the development committee felt that they were not getting enough support from the stakeholders. In assessing the third subobjective, it became evident that the development committee was able to make well - informed decisions in natural resource management, but they lacked the ability to influence and implement the decisions taken. / Thesis (M.Env.Dev.)-University of KwaZulu-Natal, Pietermaritzburg, 2010.

Community Based Natural Resource Management (CBNRM) is a paradigm that has emerged in response to the perceived failure of past approaches to conservation and development. CBNRM is intended to deliver socio-economic development to impoverished rural communities, who manage natural resources, and harness the utility of these resources as a vehicle for development. This dissertation revisits the concept of CBNRM, using the Tchuma Tchato project at Bawa, Tete Province, Mozambique as a case study. A conceptual framework for a CBNRM project intervention is developed and used to analyse the Tchuma Tchato project. The role of external agents, and particularly the lead institution, is vital to a project intervention. It is shown that external agents need to be well organised, and they need to interact effectively as a team. External agents need to have the financial and human capacity, and an understanding of CBNRM to play a constructive and effective role in a time-bound project intervention. A project intervention must evolve from a top-down intervention into an autonomous CBNRM programme, that is sustainable, and that can contribute to a process of sustainable development and conservation after the end of a project life. In order to realise this, a project intervention must be rigorously planned and designed. This formulation is critical to the subsequent implementation and operation of a project. It is vital that a CBNRM addresses the key characteristics of CBNRM, and that in doing so, it delivers social, economic and environmental development to the targeted community. Analysis of the Tchuma Tchato project at Bawa has elucidated that the project is floundering. Application of the conceptual framework to Tchuma Tchato has established causes for this. The primary cause is a weakness in the roles played by the lead institution and external agents. The project was not rigorously formulated. The project has not been effectively managed. The project has failed to address the key characteristics of CBNRM, and it is not contributing to a process of sustainable development. This analysis has facilitated the identification of remedial actions for Tchuma Tchato at Bawa, and recommendations for future CBNRM projects have been made. / Thesis (M.Env.Dev.)-University of Natal, Pietermaritzburg, 1998.