<p> Understanding survival and breeding season length of game birds are important for effective management and conservation. By determining the variables that drive survival and recovery rates for white-winged doves (<i>Zenaida asiatica</i>), I can offer management implications to agencies across their range. There is currently little knowledge about white-winged dove molting and hatching chronology. The objectives of this study were to: 1) investigate annual survival and recovery rates of white-winged doves, 2) determine intrinsic and extrinsic factors influencing them, 3) determine AHY primary feather molt rate and the factors that influence molt rate and initiation, and 4) describe hatch chronology and determine the factors that influence hatching. To understand what influences annual survival and recovery, I examined subpopulation, climate variables, urbanization characteristics, molt, and band type as covariates. I used the Brownie approach in the RMark package of R to compare annual survival and recovery models and generate estimates. I used Underhill and Zucchini models in the Moult package of R to determine AHY primary feather molt rate and the best predictors of molt rate and initiation. I analyzed molt scores of HY doves recorded during annual banding using GLMs in R to determine the factors that influence hatching. I used AIC to select the most parsimonious models for each <i>a priori</i> candidate set. I analyzed 71,675 bands, of which, 3,086 were recovered from 2007 &ndash; 2016. My most supported model influencing survival and recovery was [<i>S</i>(age class x urban intensity) <i>f</i>(age class X MRPP)]. Average AHY primary molt rate across Texas was 13.21 &plusmn; 0.93 days. MRPP subpopulation + Year was the most supported model influencing AHY primary molt rate, AHY molt initiation, and hatch date. Within my sample, 95% of AHY white-winged doves began molting from 7 April to 8 July and completed molt 17 August to 17 November. White-winged doves hatched as early as 6 January and as late as 27 July, with 95% of all hatching occurring between 22 March and 18 June and peaking at 5 May. Urban intensity was an important variable influencing annual survival, which is expected for such an urbanized species. MRPP subpopulations influenced vital rates and should be considered for future harvest management. </p><p>

Thesis (MTech (Human Resource Management))--Cape Technikon, Cape Town, 2003 / Co-operative education is an important sub-system of education that plays an essential role in the development of students' critical and creative thinking skills. The idea behind any co-operative education programme is that students alternate their academic periods at the academic institution with periods in the world of work, with the aim of implementing their theoretical knowledge in practical situations. The Co-operative Education lecturer plays an integral role in the co-operative education programme. He is an indispensable link in the interaction between the student the employer and the academic institution. The changing circumstances in South Africa's labour and education sectors warrant research into methods of improving current education systems and processes. A better understanding of what exactly a Co-operative Education lecturer is responsible for can lead to an improvement of the co-operative education process. Before the researcher undertook this study, there was no specific scientifically established model pertaining to the profile of a Co-operative Education lecturer in South Africa. Therefore, there were no set guidelines for the effective recruitment, remuneration, training and assessment of such a person. The objectives of this study were fourfold: • To define the current role, responsibilities, personality traits, abilities, characteristics, types of experience and level of qualifications of a Co-operative Education Lecturer. • To establish a profile of an ideal Co-operative Education Lecturer. • To create a job description that can be used as a guideline for the effective recruitment, remuneration, assessment and training of Co-operative Education Lecturers. • To identify areas for further research. The researcher investigated the roles and responsibilities; personality traits; abilities and characteristics; types of experience; and qualifications needed by the Co-operative Education Lecturer to complete his job successfully. From the investigation it is evident that the Co-operative Education Lecturer's function in the total co-operative education process is multi-dimensional. He plays an integral role in the effective functioning of the co-operative education programme and is an indispensable link in the interaction between the student, the employer and the academic institution. A profile of a Co-operative Education Lecturer was created as part of the research project This profile can be seen as a benchmark for Co-operative Education Lecturers in South Africa. The profile made it possible to obtain a holistic picture of the Co-operative Education Lecturer and what is expected of him to ensure that the co-operative education process is implemented successfully. The job description developed as a product of the research can be utilised as a tool in the effective recruitment, remuneration, training and assessment of Co-operative Education Lecturers in South Africa

<p> This research is composed of three essays. It highlights the driving factors of land conversion and crop acreage response focusing on North Dakota agriculture and estimates the benefits of conservation land measures at west central South Dakota watershed. The major questions that are addressed here are how and why agricultural producers decide among different land use choices, crop selection, and land conservation measures and how their decision vary over time? The first essay examines the long run land conversion trend interconnected with change in crop, oil, and ethanol prices, climate and renewable fuel policy mandates. Data are obtained from Cropland Data Layer from 1997 to 2015 period of National Agricultural Statistics Service (NASS) at the USDA. The first essay employs a Seemingly Unrelated Tobit Regression approach to better understand the connection between land conversion and crop prices, biofuel policies, biophysical environment. Key findings indicate land-use conversion from grassland to cropland is relatively higher across the ND counties. </p><p> The second essay is designed to investigate the relationship between crop acreage response and socio-economic and environmental drivers. We use prices for crude oil, planted acres of major crops (corn, wheat, soybean, hay) and prices from the period of 1990 to 2015. This essay focuses on corn acreage response due to crop prices, energy policies, climate and other socio-economic factors using a Fixed Effect parameter framework. </p><p> The final essay estimates environmental benefits due to adoption of conservation practices. In other words, it analyzes the economic and environmental benefits of implemented conservation practices at Bad River watershed in South Dakota using an integrated framework. For example, in an article in the Global Journal of Agricultural Economics, Extension and Rural Development (2016), a Benefit Cost Analysis model is utilized to assess soil conservation benefits and evaluate economic impacts of conservation measures at a watershed scale. The economic analysis includes estimation of benefit cost ratio, annual rate of return of conservation practices. Key findings suggest that benefit value of sediment reduction average $2.13 per ton expressed in constant (year = 2000) dollars and the ratio of benefits to costs is greater than 1.</p><p>

<p> Plant populations experience both spatial and temporal environmental heterogeneity, and their strategies for coping with environmental heterogeneity are shaped by their inability to move in response to unfavorable conditions. In addition, human induced land-use change, including changes in grazing regimes and shorter fire-return intervals, has become increasingly common as a source of environmental heterogeneity experienced by plant populations. This research focuses on how native Great Basin plants respond to environmental heterogeneity, studying three stages of plant life-histories: seed germination, seed banks, and mature plants. My dissertation sought to: 1) identify relationships between climate variability and population-level variation in germination strategies of arid land forbs, 2) use occurrence records from herbaria to compare the climate niches for a group of arid land forbs, and 3) investigate the relationship between disturbance history and seed bank dynamics in sagebrush steppe communities. </p><p> The second chapter examines the similarities and differences between the climate niches and the geographic distributions of a set of co-occurring understory forbs found in sagebrush steppe systems. We used distribution models of the potential habitat for our species to estimate the range size, niche breadth, and geographic overlaps between our species. Next, we used model results to identify climate variables most predictive of the distributions of the individual species. Lastly, we compared the mean and variability for precipitation and temperature across known occurrence locations for each species to assess similarities and differences in climate characteristics where these species grow. We found that species varied in their predicted area of occupancy, niche breadth, and the climate characteristics most predictive of their suitable habitat. Only two of the ten species shared a comparable climate niche. This work demonstrated that herbarium records can be used to estimate climate preferences and potential habitat for understudied species. </p><p> The third chapter investigates seed bank dynamics in a Great Basin sagebrush steppe system, comparing sites that differ in their disturbance history. We asked whether shrub cover, ground cover, climate, or disturbance history (fire and grazing) were predictive of the seed densities in the soil, the diversity of native and introduced species, the presence of rare species, and similarity between the above and below-ground species composition. We found that common measures of fire history and grazing use may be overly coarse for predicting the effects of disturbance on seed bank dynamics. We also found that shrub cover was highly predictive of the seed bank dynamics in this system. Shrub cover of early seral shrub species was predictive of patterns consistent with moderate disturbance or recovery from disturbance within the above and below-ground plant community, while increasing cover of later seral species, such as <i>Artemisia tridentata,</i> produced patterns indicating a longer time since disturbance. </p><p> The fourth chapter asks how mean climate and climate variation at individual sites and across a species&rsquo; range affects the specialist-generalist spectrum of germination strategies exhibited by ten arid land forbs. We investigated these relationships using climate data for the western United States, occurrence records from herbaria, and germination trials with field-collected seeds. We found that nine out of ten species exhibited population-level variation in germination, and that generalist strategies were associated with higher spatial variation in actual evapotranspiration at a local scale and higher variation in available water in the spring and annual precipitation at a range-wide scale.</p><p>

<p> The primary goal of this research is to advance methods for deriving fine-grained, scalable, wildland fuels attributes in 3-dimensions using terrestrial and airborne laser scanning technology. It is fundamentally a remote sensing research endeavor applied to the problem of fuels characterization. Advancements in laser scanning are beginning to have significant impacts on a range of modeling frameworks in fire research, especially those utilizing 3-dimensional data and benefiting from efficient data scaling. The pairing of laser scanning and fire modeling is enabling advances in understanding how fuels variability modulates fire behavior and effects. </p><p> This dissertation details the development of methods and techniques to characterize and quantify surface fuelbeds using both terrestrial and airborne laser scanning. The primary study site is Eglin Airforce Base, Florida, USA, which provides a range of fuel types and conditions in a fire-adapted landscape along with the multi-disciplinary expertise, logistical support, and prescribed fire necessary for detailed characterization of fire as a physical process. Chapter 1 provides a research overview and discusses the state of fuels science and the related needs for highly resolved fuels data in the southeastern United States. Chapter 2, describes the use of terrestrial laser scanning for sampling fuels at multiple scales and provides analysis of the spatial accuracy of fuelbed models in 3-D. Chapter 3 describes the development of a voxel-based occupied volume method for predicting fuel mass. Results are used to inform prediction of landscape-scale fuel load using airborne laser scanning metrics as well as to predict post-fire fuel consumption. Chapter 4 introduces a novel fuel simulation approach which produces spatially explicit, statistically-defensible estimates of fuel properties and demonstrates a pathway for resampling observed data. This method also can be directly compared to terrestrial laser scanning data to assess how energy interception of the laser pulse affects characterization of the fuelbed. Chapter 5 discusses the contribution of this work to fire science and describes ongoing and future research derived from this work. Chapters 2 and 4 have been published in International Journal of Wildland Fire and Canadian Journal of Remote Sensing, respectively, and Chapter 3 is in preparation for publication.</p><p>

<p> Involving a diversity of stakeholders in conservation issues is an important and growing trend in wildlife management. My thesis provides a case study of a collaborative conservation effort in which representatives from sportsmen&rsquo;s and environmental groups came together to advise the Arizona Game and Fish Department in a project to restore bighorn sheep to the Santa Catalina Mountains near Tucson, Arizona. These stakeholders formed the Catalina Bighorn Sheep Restoration Advisory Committee to help address the human dimension factors of the project, build public support, and guide project planning and implementation. In addition to participant observation and document analysis informing my study, I surveyed 31 stakeholders both on and off the Advisory Committee and interviewed key Advisory Committee members. All stakeholders were in favor of collaborative conservation. However, there were objections to this particular Advisory Committee for this particular project. Although stakeholders had a diversity of values that informed their beliefs, the Advisory Committee members who took the time to understand the science involved, develop mutual trust and respect for others at the table, and held a strong commitment to the project goals were able to shift deeply held, values-based beliefs and find consensus on contentious project elements. This included agreeing on a mountain lion management plan that called for the killing of mountain lions that preyed on the newly reintroduced bighorn sheep. Stakeholders not on the Advisory Committee did not come to agreement on most elements of the project. This study contributes to the understanding of collaborative conservation efforts by providing a case study of a controversial wildlife conservation project that involved diverse stakeholders who worked together, successfully found consensus, and achieved their main goal of getting bighorn sheep back on the mountain.</p><p>

<p> Interactions between animal populations and their environment form the foundation of wildlife management, and provision of resources that enhance fitness produce effectual management. Hunting is a selective force that shapes behavior and other adaptations of harvested species and may subsequently impact diel habitat use. Moreover, linking habitat use to biological outcomes, such as survival, is needed to evidence habitat suitability because of equivocal relations among population density, habitat correlations, or energy availability to population dynamics. The mallard (<i>Anas platyrhynchos</i>) is among the most coveted and harvested waterfowl in North America and is a migratory species of ecological, economic, and social importance. The Mississippi Alluvial Valley (MAV) is an ancestral and continentally important wintering area for North American mallards despite significant anthropogenic wetland transformation. Through targeted objectives and consequence of soil and water conservation, financial assistance programs have expanded waterfowl habitat on private lands in Mississippi. I radiomarked 265 female mallards and tracked their diel habitat use in winters 2010-2015 to evaluate objectives related to their wintering ecology in the MAV of Mississippi. Specifically, I investigated whether waterfowl hunting influenced use of some habitats during hunting season, the effectiveness of financial assistance programs in providing habitat, and habitat suitability through habitat specific survival rates. Females made greatest use of forested and emergent wetlands diurnally and emergent wetlands and flooded cropland at night. Results suggested that mallards did not avoid flooded cropland or emergent wetlands diurnally during hunting season, but conclusions were complicated by significant use of inviolate sanctuaries. Mallards used numerous incentivized conservation program wetlands, but use was less than public and privately managed wetlands. Among conservation programs, those with large enrollment and a focus on restoration (i.e., Wetlands Reserve Program) were most used by mallards. Apparent survival was independent of diurnal habitat use suggesting that mallards use of wetland complexes leads to their winter survival. Restoration of forested wetlands should be a management focus and easement programs provide such inroads on private lands. Public wetlands are an important source of habitat and inviolate sanctuary should be considered where waterfowl hunting is a predominate activity.</p><p>

Access to safe and clean water is a problem in many countries in the world, especially sub-Saharan Africa. The urgency of the was recognized by the United Nations through its 2008 Millennium Development Goals, which were recently replaced by the new Sustainable Development Goals. Lack or poor access to clean water not only creates conflicts and rifts among the people, but also makes them more susceptible to a wide assortment of water borne diseases. The purpose of this dissertation is to complete a pilot study of ways of thinking and actions of a small group of people from Falifah, a village in The Gambia, who suffered from lack of access to safe and clean water. During my fieldwork in Falifah, I helped the community install a water filtration system in the village, and explored its value in improving the lives of the villagers. In particular, I conclude that village gained a sense of empowerment, for the water filtration system offered them the opportunity to become intimately involved in its implementation and its continued sustainability. This is especially important for women, given the long history of patriarchal control in this African village and many others like it.

<p> &ldquo;Biogeographic affinity&rdquo; describes the similarities in the flora and fauna of one location compared to those of another location, resulting from their common evolutionary history and/or their contemporary connectivity (Loveland and Merchant 2004). The existence of the biogeographic affinity hypothesis allows the hierarchical classification of regions into faunal, floristic or other biogeographic provinces. Additionally, the latitudinal biodiversity gradient (LBG; Brown and Lomolino 1998) is normally illustrated by a diverse tropical fauna at low latitudes and decreasing species richness with increasing latitude. Here, I compare the relative influences of biogeographic affinity and the primary ecological gradients of the southern Colorado Plateau in the Grand Canyon ecoregion (GCE, Table 2; elevation, litter accumulation, and anthropogenic influences) on the distribution and abundance of land mollusks. I test four specific null hypotheses: (1) Biogeographic affinity does not influence the distribution of GCE land mollusks, (2) GCE land mollusk species and assemblages are uniformly distributed across elevation, analogously reflecting the absence of biogeographic affinity, (3) Habitat patch size (spring area) does not influence GCE land mollusk species richness and (4) The GCE land mollusk assemblage is not strongly influenced by microhabitat factors that are independent of elevation impacts. </p><p> To test my hypotheses, I used classic and contemporary literature and museum collections to build a comprehensive species list for the Grand Canyon ecoregion. This list included spatial (location, elevation) and ecological (biogeographic affinity) data to test hypothesis 1 (proportional representation) and hypothesis 2 (neotropical to boreal distribution. across elevation). I also used randomly sampled terrestrial mollusks in three elevation zones at 19 paired spring and matrix habitat sites, while also recording environmental data on leaf litter depth, isopod presence or absence, grazing presence or absence at each sample, canopy cover and spring area at each site. These data were used to test hypothesis 3 (spring area-species diversity relationships) and 4 (measured site- specific independent variables will predict species diversity). </p><p> The results of this analyses show: 1. The GCE land mollusk fauna is not equally distributed across 7 North American Biogeographic Provinces. Instead, the GCE is overrepresented by boreal, alpine and temperate species. 2. This two-dimensional pattern of overrepresentation was preserved across (3-dimensional) elevational gradients within the GCE. Communities were at least 84% dissimilar between elevation zones, with New- World temperate and wide-ranging circumpolar species being the dominant drivers the mollusk community composition even at low elevation sites. 3. Shannon-Weiner diversity (supporting the Latitudinal Biodiversity Hypothesis) and leaf litter depth (productivity) within springs decreased with increasing elevation. 4. Among the measured physical (spring/matrix, litter depth, canopy cover, species-area) and anthropogenic (isopods, grazing) factors, elevation was the only one found to predict species community composition. </p><p> These results indicate that while springs in the southwest USA are presumed to be relictual habitats, temperate land mollusks still possess an apparent advantage over neotropical species even at low elevation springs, where they are more abundant and diverse. These data support the Latitudinal Biodiversity Gradient (LBG) in a novel and unusual way, where low elevation sites are the most diverse, but are characterized by wide-ranging temperate and boreal species, with significant community compositional change across elevation.</p><p>

Ph.D. / The purpose of this study was to explore the lived reality of the work of Human Resource practitioners in South Africa in relation to the socio-economic context of their organisations and to consider how appropriate or not their responses might be to the impacts of that context on their work. This was explored through a qualitative study wherein interviews with 50 volunteer practitioners from all types of organisations spread across the country were conducted and compared to views of 17 informed commentators in this field. It was found that the work of Human Resource practitioners is signficantly impacted by social and economic factors external to the workplace, but that the current response by practitioners is probably not as appropriate as it could or should be. A role for human practitioners as “social activists” was identified and factors influencing whether such a role is played were explored. Frameworks of appropriate actions are proposed at both strategic and individual contributor level to support this role. The role of Human Resource professional bodies in addressing social issues in South Africa is challenged and a framework proposed to improve the extent to which leadership is given to Human Resource practitioners and to increase the visibility and voice of the profession in contributing to alleviation of societal problems. Recommendations for implementation of the proposed frameworks are proposed. One of the most significant recommendations is for Continuing Professional Development to provide coaching support based on Constructive-Developmental theory to enhance the ability of Human Resource practitioners to cope with the high levels of complexity that they encounter in their roles. Further research into a proposed model of influencing factors in the social activist role is recommended.