Exurbanization is occurring where large tracts of land are being sold to developers. Typically these are ranches that are then divided into 40-acre parcels and sold by developers, avoiding subdivision regulations requiring paved streets, utilities and other amenities. The result is an unplanned subdivision with no infrastructure, and tax revenues that cannot offset the cost of providing it. Interviews with professional planners suggested there may be independent variables capable of predicting the amount of human disturbance in an exurban area: parcel size, full cash value, tenure, distance to paved roads, site-built housing, mobile homes, and presence of biological or riparian areas. A total of 7,465 acres (3,022 ha) of parcel disturbance were digitized in exurban Arivaca, acreage values were converted to a binary dependent variable and used in logistic regression analysis to test independent variables' predictive value. Four were statistically significant: parcel size, full cash value, mobile homes and site-built housing. Landscape fragmentation was also tested using the presence of the variable scoring highest in probability - site-built housing. Zones of influence with a negative ecological influence surrounded the homes - up to 5,055 acres (2,046 ha) were impacted. Interviews with an exemplary sample of residents regarding their land use ethic found all had very strong opinions on how their properties should be treated as well as undesirable land uses such as overgrazing, over-use of groundwater for short-term economic gain and use of off-road vehicles. An explanation of the small sample size of both planners and residents is warranted. Planners were limited to those working in Pima County government who had professional experience with the study area of Arivaca and were familiar with its particular situation. The number of Arivaca residents interviewed was intended to discern an exemplary group's opinions based on how large a parcel they owned, the various sizes being a typical cross-section of acreage in the study area. What these findings illustrate is (1) the difficulty of predicting human-induced disturbance, (2) land fragmentation is more than the actual areas of physical disturbance and (3) some residents are aware of impacts related to their activities, mitigating damage wherever possible.

No description available.

This research applied the social network approach to unveil the social structure underlying the members of two traditional irrigation systems (TISs) in Sonora. This research used two TIS case studies representing rural communities located in arid and semiarid lands in the Sonoran Desert region, in the northwestern part of Mexico. The irrigators represented a subset of rural villages where everyone knew everyone else. The theoretical framework in this study suggested that social embeddedness of the economic activities of TIS irrigators is an important factor supporting their local institutions. Irrigators who are socially embedded posses more social capital that help them in overcoming social dilemmas. Evidence of social embeddedness is theoretically incomplete when not related to a tangible dimension of the TIS's performance. This research also dealt with the difficulty of assessing the sustainability or successfulness of a TIS. The results showed that the irrigators sharing a rural village are entangled in a mesh of social ties developed in different social settings. The most salient variable was family; cooperative ties within the irrigation system tend to overlap more than the expected by chance with kinship relationships. Likewise, irrigators had a strong preference for peers geographically close or those within the same irrigation subsector. Finally, the qualitative part of the study did not reveal the presence of severe social dilemmas. Irrigators in each community have developed successful forms of local arrangements to overcome the provision and appropriation issues typical of common pool resources. Nevertheless, the qualitative analysis revealed that there are other socioeconomic variables undermining the sustainability of the systems, such as migration, water shortages and social capacity of the systems.

Human-induced land degradation and climate change can reduce agricultural productivity and increase susceptibility to food shortages at local and global scales. Planting perennial crop species, such as fruit and nut crops, may be an intervention strategy because of their beneficial contributions to sustainable agriculture and human nutrition. Many perennial temperate fruit and nut species are however, particularly vulnerable to frost events, drought, insufficient chill hours, and disease and insect outbreaks. Modifying these species to yield harvests under a wider range of biotic and abiotic conditions may increase the value and long-term viability of perennials in agroecosystems. This dissertation examines adaptation and ecogeography in temperate perennial fruit crops, using apple (Malus sensu lato) as an example for case studies. The resilience of feral domestic apple trees in abandoned farmstead orchards throughout the southwestern U.S. indicates plasticity in adapting to local environmental conditions. Dendrochronology reveals these trees tend to persist where they have access to supplemental water, either as shallow groundwater or irrigation. While domestic apples are cultivated under a range of growing conditions, wild relatives of agricultural crops may further expand the cultivable range of the species. Crop wild relatives are species closely related to agricultural species, including progenitors that may contribute beneficial traits to crops. Sampling the genetic variation in crop wild relatives may benefit from ecological genetics and GIS theory to reveal genetic structure. The Pacific crabapple is an example of a wild apple relative that may contain genetic variation useful in apple breeding. Species distribution modeling of the Pacific crabapple identifies a narrow climatic window of suitable habitat along the northern Pacific coast, and genetic fingerprinting reveals a highly admixed genetic structure with little evidence of natural or cultural selection. While the moist coastal Pacific Northwest is not necessarily characteristic of many apple-growing regions, the species may have useful adaptations transferable to domestic apples. Genetic resources offer a promising source of raw material for adapting crops to future agricultural environments; their characterization, conservation, and use may offer important contributions to adaptation and use of perennial crops in agro-ecosystems.

The North American Monsoon System (NAMS) is a significant weather and climate phenomenon that brings critical rainfall to the southwestern United States and northwestern Mexico. As a result of the North American Monsoon Experiment, and research efforts surrounding the field campaign, the understanding of the NAMS has increased considerably over the last 15 years. In addition questions concerning potential flash flood causing mechanisms of the NAMS have not been thoroughly investigated. This dissertation is comprised of two papers that collectively address the aspects of the literary understanding of the NAMS as we know it today and conduct an investigation into the complex interactions between various weather systems that may influence the NAMS. In the first paper, a review of the major research of the NAMS literature since the last comprehensive review 15 years ago is conducted. The results of his review are assessed for where our understanding has been improved and where future research needs to be guided for purposes of the second paper. Based upon the results from the literature review, the second paper focuses on identification of inverted troughs and gulf surges based upon lower- and mid-level atmospheric parameters for purposes of assessing the impacts on National Weather Service Storm Report flash flood dates. This research contributes to the synthesis of the current knowledge of the NAMS in general and to the specific regional impacts that do occur during periods of heavy precipitation over the NAMS region for purposes of improving meteorological predictability of flash flooding. The results can (1) gauge our understanding of the NAMS literature to date and (2) improve meteorological forecasts through the recognition of synoptic and sub-synoptic patterns related to the NAMS that are most likely to cause flash floods.

Progress in human development is threatened by the complexities of global environmental change - a defining challenge of our time. Appropriate societal responses are needed to address disturbances and increasing vulnerability of social-ecological systems. This changing context calls current development thinking into question and requires new approaches, policies, and tools to cope with growing uncertainty. With a focus on capacities instead of vulnerabilities, an approach is needed emphasizing the role of communities in planning interventions and strengthening community resilience. This research draws on vulnerability, social-ecological systems and drylands development theory to advance an integrated understanding of resilience at community level and its role towards sustainable development. To develop a general approach for development actors to characterize a community's resilience and plan locally targeted interventions is the overall objective of this research. A participatory approach towards defining and assessing community resilience forms the basis, as it is assumed this would enable development actors to more efficiently address development concerns and empower communities to strengthen their resilience. Underlying factors that determine community resilience in selected dryland communities in Tigray, northeastern Ethiopia are identified. Here, most of the population depends on subsistence agriculture, while food insecurity and poverty persist despite concerted regional development efforts. This research compares and consolidates local perceptions of determinants of community resilience that form the basis for guidelines towards a methodological framework for determining levels of community resilience in Tigray. The guidelines were used to compare levels of community resilience of communities, with implications for operationalizing community resilience in the context of drylands development practice. Findings reflect the importance of recognizing that resilience is not about maintaining a status quo, but about addressing how societies can develop in a changing environment. Prominence of resilience thinking can promote a development practice better suited to address the challenges and opportunities that changes create for poor dryland communities. Resilience thinking does not provide quick solutions, but contributes a long-term, multi-dimensional perspective of building capacities for improved responses to current needs and future change. Resilience is not a solution in itself but can contribute towards developing more resilient trajectories for drylands development.

Rural households in the West African Sahel have developed livelihood systems that allow them to survive in one of the most challenging social-ecological systems on Earth. These households have experienced environmental shocks including droughts, floods, and extreme heat for hundreds of years, and have well-established coping and adaptation mechanisms that allow them to recover from all but the most severe shocks. Climate change, particularly increased climatic variability, may stress Sahelian livelihood systems to the point that households must deploy a new set of coping and adaptation strategies in order to survive. This research, conducted as three interrelated mixed-method studies, explores the coping and adaptation strategies used by Tuareg transhumant pastoralists in Niger starting with the deep drought of 1968-1974.The first study involves rural households in the Tahoua Region of central Niger. These households have adapted to climate change and other livelihood stressors primarily by diversifying their assets, utilizing new technologies, and reducing the length of their annual transhumance. While there are donor-funded programs designed to assist rural households with adaptation to climate change, the households in this study have not been the beneficiaries of such programs. The second study attempts to disentangle climate shocks from other factors driving rural-urban migration while also exploring which households migrate to urban areas, and why. Climate change is perceived as the main factor driving rural-urban migration, as well as other livelihood changes. Household-level preferences, management skills, and luck played a greater role that asset endowments in determining which households would migrate to urban areas. The third study focused on livelihood strategies of households that had migrated to, and settled in, urban areas. These households worked hard to maintain social capital with their rural kin while also building social capital in their new urban environment. Social capital with expatriates and urban elites was an important element of urban households' asset endowment. Urbanized households possess significantly fewer livestock than their rural counterparts, and struggle to manage the cash earned from relatively low-paying wage labor. These three studies demonstrate that pastoralists perceive climate change as a significant driver of changes in livelihood strategies. Pastoralists' perceptions of climate change broadly match climate data. Furthermore, pastoralists, with little to no assistance from the state or development organizations, are successfully adapting to climate change in ways that are likely to increase their resilience to future climate shocks.

No description available.

The ongoing drought in the US Southwest (SW) has led to particularly large and severe wildfires, tree die-off events, insect outbreaks, and increased forest stress levels. These disturbances underscore the vulnerabilities of SW dry conifer forests to climate change and past land-uses. Climate projections show a clear upward trend in regional temperatures, which will lead to accelerated heat-related stressors and disturbances in the coming decades. Already, more than 20% of the dry conifer forests of the SW have been severely impacted. This number is likely to grow, but we lack a clear picture of where, when, and to what degree other forest areas will be affected. Here, I apply dendroecological methods to evaluate patterns and processes that might determine greater or lesser vulnerability in dry conifer forests. Much of this work stems from critical concerns voiced by the Navajo Forestry Department (NFD). Long-term and representative data are necessary for the NFD, as they are responsible for closely managing over 250,000 hectares of forests and woodlands for the traditional products and ecosystem services that their forests provide for the Navajo people. The first study takes a multi-century perspective on changing fire regimes across Navajo forests, and places current forest structure and recent severe events in a long-term context. We found that surface fires were frequent across the landscape from at least the late-1500s until 1880. Navajo settlement of the area began to affect the fire regimes with added small fires in some areas beginning in 1700. By 1832, the rise of traditional pastoralist practices and transhumant migrations reduced fire activity in areas of greater use. Conditions changed following the establishment of the Navajo reservation in 1868, as livestock herds grew rapidly and initiated a near-synchronous and widespread collapse of fire regimes across the study area by 1880. The legacies of this change in land use are greater forest densities and higher fuel loads in some areas, raising the vulnerability of the forest to more severe fires. The second study assesses one of the most dramatic long-term consequences of recent high-severity fires in the SW, the rapid post-fire transition of dry conifer forest to oak-dominated shrubfields. To assess probable successional trajectories and interactions with climate change of recently converted forests, we reconstructed the age structures and fire regimes of some of the largest and oldest shrubfields in the Jemez Mountains of northern New Mexico. We found that shrubfields are a resilient configuration to drought and fire, historically burning at the same rates and under similar climate as dry conifer forests. Dense shrubfields pose a significant challenge to conifer recruitment from competition effects, with our sites persisting for over 100 years in the absence of burning and through periods of favorable climate to conifers. Given future warming favoring oak over pine, and projected trends in fire activity and high-severity fire behavior, we expect much more forest area to convert to shrubfield, especially in the absence of restoration efforts to reduce crown fire potential.Finally, we evaluate landscape-scale variability in tree growth response to regional climate across the Navajo forest. Projections of climate-induced forest decline often omit upper-elevation and mesic sites because they are not represented in regional tree-ring chronology networks. We found that these stands had much lower response to 20th century droughts than mid to lower elevation stands, and that targeted tree-ring sites are consistently more correlated with regional climate. However, as temperature-driven atmospheric moisture demand has remained above average since ~1997 in the study area, the upper-elevation trees are now nearly as responsive to regional climate as lower elevation xeric sites, probably due to increased moisture limitations. Recent warming has thus synchronized tree growth to an unprecedented extent across this large landscape and regionally.

English version Subject: Pharmacy in the Czech lands between 1938/39 and 1945. Objective: Study of pharmacy in the Czech Lands between 1938 and 1945 and study of the pharmaceutical branches, especially pharmacy practice, pharmaceutical education, pharmaceutical industry and professional organizations during the World War II. Methods: Processing of the historical pharmaceutical press from Czech pharmaceutical museum in Kuks. Results: The financial situation of pharmaceutical staff between 1939 and 1945 was increased by pay rise and turnover rise in pharmacy. Short supply of ingredients was equalized by increase in drug production in pharmaceutical industry. University education of pharmacists was stopped by Germans in 1939. Jewish companies in pharmaceutical industry were impouded by german merchants. Conclusion: Business in pharmacy during the World War II was successful for pharmacy owners and their employees. Many pharmaceutical problems such as increase in pharmaceutical rates, build up of Pharmaceutical centre and particular unification of professional organizations was resolved.