Thesis (Ph. D.)--University of Washington, 2005. / Vita. Includes bibliographical references (p. 209-222).

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To examine bat - habitat relationships, ultrasonic detectors were used to sample bat activity among: old-growth white pine (Pinus strobus ), mature white pine, boreal mixedwood, and selectively-cut white pine stands in central Ontario. Within the stands, bats were sampled in the canopy, the understory layer, and within canopy gaps. Forest structure was measured within each of the stands. The activity of bats was compared among forest stand types, within the stands, and in relation to forest structure. Also, maintaining forest wildlife populations requires data on the use of snags (i.e. dead trees). To provide further resolution of the habitat requirements of forest-dwelling bats, radio telemetry and exit counts were used to investigate the roosting ecology of mouse-eared bats (Myotis lucifugus and M. septentrionalis). Characteristics of snags used by mouse-eared bats were compared with randomly located snags and random geographic points, at three spatial scales (focal tree, surrounding forest, and landscape). (Abstract shortened by UMI.)

This qualitative study examines sixteen women's understanding of their experiences in community organizing in a northern urban context. While most front-line community organizing is done by women, there is a paucity of research giving voice to their particular realities. Similarly, there is little information describing community organizing in a northern urban context. The study's conceptual frameworks draw on theory and research from rural and northern social work, activist mothering, feminist social policy, diversity and exclusion, and the social construction of identities. It follows a feminist research paradigm. The study illustrates women community organizers' sense of place and their perceptions of the politics of language, cultural and linguistic tensions, and the influences of northern economic and geographic realities. The research findings demonstrate the processes of community organizing in a northern setting, community organizers' demoralization because of increasingly less generous social policy environments, and the challenges of racial and linguistic divisions in community organizing. The study challenges the urban lens dominating social work education and highlights the legitimacy of community organizing within social work education. It discusses future research possibilities for cross-cultural community organizing involving minority francophone and ethnocultural populations as well as the relativity of notions of oppression within francophone spheres.

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Mega-retailers are widely criticized as causing devastation among smaller retailers, particularly in mid-sized markets in the United States. Others argue that small retailers can survive “in the shadow of the retail giants,” by offering levels of customer service that the mega-retailers can’t provide due to their very size. This paper reports the findings of an empirical study of the perceived impact of the recent opening of box-retailers, such as Costco and Home Depot on locally owned/operated small retailers in the northeastern Ontario city of Greater Sudbury, Canada from 1999 to 2003. The sample included 78 smaller store owners, on average in operation for the last 21 years. Aggregate results confirmed the hypotheses that small retailers suffered lower sales and clientele since the arrival of mega-retailers, and could clearly identify their and mega-retailers’ respective competitive advantages and disadvantages as compared to each other. Respondents had a significant perception of having an advantage over their mega-competitors in the areas of Store Cleanliness, Value for the Customer, Products’ Quality, and Store Layout. While a number of respondents suffered lower sales, about one-third of them (the Resisting Retailers) had average sales growth of over 21%. Differentiation and Niche Marketing were the main aspects of a successful competing strategy adopted by resisting retailers against mega-retailers. Some of the strategic moves adopted by resisting retailers amounted to a “Vacuum Strategy,” which includes the refusal to carry brands available at mega-stores, and the refusal to service such brands or to have anything to do with megaretailers, refusing any alliance with them and making it known to customers.

Over a century of mining activities and smelting in the area of Sudbury, Ontario, Canada have resulted in the contamination of the local soils with metal(loid) bearing particulates. Minor and trace elements associated with these phases are released during their weathering. This release is therefore strongly dependent on the mineralogical and chemical character of the metal(loid) bearing phases. The metal(loid)s are then subject to transport before being attenuated through their incorporation into secondary phases. Elevated concentrations of metal(loid)s in silica rich alteration layers has recently been described for altered surfaces at the solid-water and solid-atmospheric interfaces in tailings, and in the vicinity of smelters, respectively. To determine if similar coatings occur in soils, samples were taken from areas around three major smelting centers in the area. Coated grains were extracted from these samples and individually mounted to be analysed. Particulate matter (representing primary metal(loid)-bearing phases) and coatings (secondary metal(loid)-bearing phases) were analysed using scanning electron microscopy, Raman spectroscopy, Laser-Ablation Inductively-coupled plasma mass spectroscopy, Micro-X-ray fluorescence, and X-ray photoelectron spectroscopy. The particulates were divided into three main groups: smelter-derived particles, sulfides, and nickel-oxides. Smelter derived particles contained the most elevated concentrations of metal(loid)s in their sulfide inclusions and metal(loid)-rich rims. The mobility of metal(loid)s in the identified mineral phases found within particulates mirrored the transport observed in the soil column; Zn>Cu>Ni>Pb. Once mobilized, these elements are subject to transport before being attenuated by secondary phases. Micro-coatings were found to be composed of hematite, schwertmannite, ferrihydrite, silica, and jarosite group minerals. Coatings are distinguished on the basis of their atomic Si:Fe ratios: FeOx coatings have Si:Fe <1, Si–FeOx coatings have Si:Fe between 1-10, and SiOx coatings iv have Si:Fe>10. Iron-rich coatings (FeOx) and silica-rich coatings (SiOx) have lower trace-metal concentrations than Fe-SiOx coatings. Micrometer-thick coatings are predominantly composed of hematite, schwertmannite, ferrihydrite and (amorphous) silica and contain elevated metal(loid) concentrations in the form of metal(loid)-rich phosphate minerals (mainly minerals of the jarosite group). A general model is developed that describes the formation of mineral coatings in acid soils and their important role in the uptake and retention of metal(loids). Here, micrometer-thick Fe-silica coatings form through adsorption, co-precipitation and dehydration processes involving amorphous silica and iron hydroxides. Metal(loid)-bearing phases nucleate within a gel-type matrix and are subsequently preserved during dehydration and solidification. Aluminum-rich surfaces form on mineral grains once the pH has been raised sufficiently high (pH~5-6) so as to lead to the complete removal of sulfate-bearing phases. The implications of this model are widespread in terms of the attenuation of metal(loid)s in acid soils and their retention or subsequent remobilization in recovered soils with near neutral pH.

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