This study considers how environmental concerns helped shape Melbourne's public parkland in the period 1850-1920, when Melbourne's first parks were developed and during which ecology began to replace natural history as the determinant of environmental thought. Theories propounded by such figures as Alexander von Humboldt and George Perkins Marsh profoundly influenced land management around the world during this period, and by relating specific parkland developments to professional and popular ideas about the environment the study aims to place the parkland in an international context. Previous research has given little thought to the effect of environmental thought on Melbourne's parks, except for Ferdinand von Mueller's development of the Melbourne Botanic Garden where the influence is evident. Such influence has not been considered in Clement Hodgkinson's contemporaneous development of the city's other parks and gardens even though, like Mueller, Hodgkinson was closely involved with environmental issues of the day. The Field Naturalists Club of Victoria, of which Mueller was a member, has long been credited with influencing Wattle Park's development early in the 20th century, although there is little critical analysis of the extent to which it was able to bring popular concerns about the environment to bear on park design. The relationship between Mueller's environmental views and actions and his development of the Botanic Garden is discussed first. Connections are then made between Hodgkinson's early experiences as a surveyor, his later work as Victoria's foremost land manager, his association with Mueller, and his design of Melbourne's first parks and gardens. Finally, the FNCV's involvement in park development is examined while exploring the changing nature of environmental thought. Clearly, environmental thought did influence the development of some parkland, but only those reserves administered by Mueller and Hodgkinson and only while the two men remained in control. The success of the FNCV in influencing the future direction of any Melbourne park or garden is not so easily discernible, with little evidence that the Club played an important role in Wattle Park's development.

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Once abundant across the Great Plains of North America, prairie-parkland elk (Cervus canadensis manitobensis) underwent a catastrophic population collapse and dramatic contraction of their overall range through the late 1800’s and the early 1900’s due to habitat loss (primarily from agricultural expansion) and unregulated hunting. Populations were able to recover in some areas following new hunting regulations and the establishment of protected areas. Prior to this study, the current distribution of prairie parkland elk was poorly understood, though it was established that they were largely relegated to large protected areas and made use of adjacent agriculture dominated landscapes. In order to effectively manage prairie-parkland elk so populations remain resilient to ongoing habitat loss, population reduction and disease risks, detailed mapping of their range and an understanding of the environmental factors most important to elk is essential. The purpose of my thesis is to characterize elk distribution and resource selection patterns in the prairie-parkland of Saskatchewan and Manitoba, Canada, at a landscape scale and assess the implications of distribution for species persistence, by using both local ecological knowledge (LEK) and biological research techniques in tandem. Integrating LEK with more conventional biological research can provide complementary data at contrasting time and spatial scales and facilitates comparison of multiple independent datasets. Furthermore, LEK research creates important opportunities to engage stakeholders in contributing knowledge and may facilitate relationships and contribute toward more effective resource management. I used three sets of biotelemetry-collar data from across Saskatchewan and Manitoba (n = 328 collared elk; 1998–2012), in conjunction with LEK from hunters, biologists and enforcement officers (n = 71 participants) to create a series of resource selection functions (RSFs) characterizing elk distribution across Saskatchewan and Manitoba. I gathered LEK in workshops where participatory mapping was conducted with local experts across the study area. The RSF analysis determined that prairie-parkland elk selected locations close to protected areas and far from high road density. Elk also selected areas with moderate amounts of mixed-wood and deciduous forests and herbaceous vegetation. Models developed with LEK only, biotelemetry collar data only and a combined dataset were all validated against an independent dataset of elk crop damage locations. All models predicted elk presence well. The RSF scores of the LEK only and radio-collar only models were not significantly different. Successful conservation management requires identifying which areas are most important to a species, and assessing if these areas are vulnerable to threats, as well as balancing human resource needs. Using the RSF-based maps of prairie-parkland elk distribution, I identified locations of high quality habitat (top 10% of RSF values) and determined which of those areas were vulnerable to agricultural expansion, forestry, disease, and hunting. I identified 81 high quality habitat areas with a combined total area of 30 753 km2. One or more vulnerability factor impacted 87% of the identified core area. High quality areas were clearly clustered around the boreal-prairie transition zone and large protected areas. The majority (88%) of high quality core areas were located within protected areas. A connectivity analysis using least cost path analysis determined that core habitat areas endemic with chronic wasting disease (CWD) in wild elk are highly connected to other high quality habitat areas. CWD thus has the potential to reduce cervid populations within the study area. My thesis results highlight that prairie-parkland elk populations in Saskatchewan and Manitoba remain threatened by habitat loss and disease, and emphasize the need for habitat conservation to prevent further population reduction. While elk populations have regained a small fraction of the range lost at the turn of the last century, they have not been able to re-establish with much success in the prairie portion of their range. I also determined that LEK can be as effective as conventional biological research approaches to develop RSFs. I also confirmed that stakeholders within the study are knowledgeable about elk behaviour. The distribution maps and identified areas of priority concern created in this thesis can provide important insights to support the management and maintenance of abundant elk populations.

Since European settlement the Aspen Parkland has been subject to agricultural intensification. This research assessed the agronomic, ecologic and economic impact of native Parkland conversion into tame pasture, by building on a study initiated in 1980 investigating the short-term agronomic responses within three landscape-level treatments: an intensive Clear & Break (C&B), a Spray & Burn (S&B) and a burnt Native Check (NC). Historical information was supplemented with recently collected data (2005-2006). Production remained high within the NC relative to the others after 25 years, in part due to contributions from browse in areas with increasing woody species. Plant species composition also demonstrated considerable convergence (i.e. overlap) between native and tame grasslands, and although not different in soil organic matter, microfaunal activity differed marginally. Net present value (NPV) economic analysis indicated the NC and S&B provided greater aggregate returns over the study period, and has implications for aspen management in the future. / Rangeland and Wildlife Resources

Smart Growth is a comprehensive approach to planning that aims to shape more compact and well-connected communities across the United States. Among its principles are leveraging existing infrastructure, developing around transit, providing a mix of housing types and price ranges, and increasing community participation in the planning process. However, research suggests the comprehensive approach at times obscures potential tensions between these principles, in particular when Smart Growth principles are applied to a specific property. This is the case in Austin, Texas’ Lamar/Justin Lane TOD, where the City of Austin is currently evaluating development scenarios for a publicly-owned 5.6 acre parcel located within the TOD area. How equity and access is addressed in Smart Growth comes to fore in conversations between the City and affluent, neighborhood residents. This report examines the history of Smart Growth, reviews its implementation in cities across the U.S., and considers how the City of Austin may learn from other cities. / text

This study is designed to investigate the nature of the group structure at the Parkland Hospital School of Nursing, Dallas, Texas.

Social media played a pivotal role during The Never Again MSD Movement. This study examines the communicative tools social media, specifically Twitter, provides its users in order to communicate and distribute information. Authors Evans, Twoney, and Talan describes Twitter as “a valuable tool because it allows for instant communication to a wide audience” (9). Twitter is a valuable tool for communication because it fosters an online space where activists utilize the following communication tools: conversation, community, connection, collaboration, and accessibility. The study describes how activists use those tools in the type of messages being communicated on digital spaces. Through a context analysis on tweets from 3 prominent leaders of the movement: Sarah Chadwick, David Hogg, and Cameron Kasky, common themes were identified. The data was collected from a 6 week period ranging from February 14th, 2018 - March 28th, 2018. The purpose of this study is to ultimately examine how activist communicate on online spaces during social movements. Twitter offers activists a series of communication tools such as community, accessibility, and collaboration. Activists use these tools to first communicate about a variety of different topics relating to the movement as well distribute information and encourage involvement from other users. The results from the analysis determined that there is indeed power in communicating your message in online spaces. The study concludes with these findings: social media, specifically Twitter, is represented as a communication tool. The leaders of the Never Again MSD Movement use those tools in a variety of different ways such as communicating their personal opinion, encouraging involvement as well as promoting collaboration, community, and accessibility. / Includes bibliography. / Thesis (M.A.)--Florida Atlantic University, 2019. / FAU Electronic Theses and Dissertations Collection

The encroachment of woody species into grassland and savanna ecosystems has been well document since the early 1800s. Within the parkland ecoregion of western Canada, trembling aspen (Populus tremuloides Michx.) has been one of the key tree species increasing in dominance. Aspen encroachment is best explained not by single mechanism, but rather by a number of interacting ecological factors. In this study I examined the ecological consequences of the clonal biology in aspen as a means to explain persistence and observed tree-grass ratios within grassland savannas of western Canada. Results suggest that aspen stands cycle between a “stable” phase characterized by a dense mature canopy, and an “unstable” phase characterized by canopy breakup and increased regeneration from root suckers. It is during this unstable phase that clonal encroachment is likely to occur. Within these mature stands, different-aged ramets promote persistence by maximizing developmental variation. Such a mechanism overcomes the functional phenotypic uniformity of ramets within a single age-structured stand. Results from my study indicate that physiological integration is beneficial to the growth and survivorship of regenerating and encroaching aspen ramets. My results also suggest that the benefits of physiological integration are greatest in more stressful environments, and in recently established post-fire ramets. Finally, the consequences of variation in adaptive ecological relevant traits among individuals was examined by determining differences in vigor among aspen clones in relation to the production of secondary compounds (phenolic glycosides). My results demonstrate a high degree of variation in leaf phenolic glycosides production among clones. A significant amount of this variation was accounted for by differences in clone vigor (within population: individual susceptibility hypothesis), with a smaller amount related to environmental differences (among populations). In all instances, vigorous clones were significantly higher in levels of phenolic glycosides compared with dieback clones, suggesting that some individuals may be predisposed to undergo density-independent mortality. This has important ecological implications, because it implies that one of the key mechanisms regulating population dynamics, community interactions and biodiversity may be related to intrinsic adaptive differences in susceptibility among individuals.

Regional variation in nitrogen (N) deposition increases plant productivity and decreases species diversity, but landscape- or local-scale influences on N deposition are less well-known. Using ion-exchange resin, we measured variation of N deposition and soil N availability within Elk Island National Park in the ecotone between grassland and boreal forest in western Canada. The park receives regionally high amounts of atmospheric N deposition (22 kg ha⁻¹ yr⁻¹). N deposition was on average higher ton clayrich luvisols than on brunisols, and areas burned 1 – 15 years previously received more atmospheric N than unburned sites. We suggest that the effects of previous fires and soil type on deposition rate act through differences in canopy structure. The magnitude of these effects varied with the presence of ungulate grazers (bison, moose, elk) and vegetation type (forest, shrubland, grassland). Available soil N (ammonium and nitrate) was higher in burned than unburned sites in the absence of grazing, suggesting an effect of deposition. On grazed sites, differences between fire treatments were small, presumably because the removal of biomass by grazers reduced the effect of fire. Aspen invades native grassland in this region, and our results suggest that fire without grazing might reinforce the expansion of forest into grassland facilitated by N deposition.

The encroachment of woody species into grassland and savanna ecosystems has been well document since the early 1800s. Within the parkland ecoregion of western Canada, trembling aspen (Populus tremuloides Michx.) has been one of the key tree species increasing in dominance. Aspen encroachment is best explained not by single mechanism, but rather by a number of interacting ecological factors. In this study I examined the ecological consequences of the clonal biology in aspen as a means to explain persistence and observed tree-grass ratios within grassland savannas of western Canada. Results suggest that aspen stands cycle between a “stable” phase characterized by a dense mature canopy, and an “unstable” phase characterized by canopy breakup and increased regeneration from root suckers. It is during this unstable phase that clonal encroachment is likely to occur. Within these mature stands, different-aged ramets promote persistence by maximizing developmental variation. Such a mechanism overcomes the functional phenotypic uniformity of ramets within a single age-structured stand. Results from my study indicate that physiological integration is beneficial to the growth and survivorship of regenerating and encroaching aspen ramets. My results also suggest that the benefits of physiological integration are greatest in more stressful environments, and in recently established post-fire ramets. Finally, the consequences of variation in adaptive ecological relevant traits among individuals was examined by determining differences in vigor among aspen clones in relation to the production of secondary compounds (phenolic glycosides). My results demonstrate a high degree of variation in leaf phenolic glycosides production among clones. A significant amount of this variation was accounted for by differences in clone vigor (within population: individual susceptibility hypothesis), with a smaller amount related to environmental differences (among populations). In all instances, vigorous clones were significantly higher in levels of phenolic glycosides compared with dieback clones, suggesting that some individuals may be predisposed to undergo density-independent mortality. This has important ecological implications, because it implies that one of the key mechanisms regulating population dynamics, community interactions and biodiversity may be related to intrinsic adaptive differences in susceptibility among individuals.