Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"adapted species"”.
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Conservation in a changing world: assessing the conservation status of an agriculturally adapted species, the blue crane
… need to stay abreast of changes to threatened species' demographics. The Blue Crane Anthropoides paradiseus has adapted to land-use change in some parts of its range. By the 1980s, numbers of cranes in their natural core range in the eastern grasslands and Karoo of South Africa had declined …
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Regeneration of fire-adapted species in the Sierra Nevada contingent upon repeated fuel treatments and available soil moisture
… structure, and fuels of these historically fire-adapted ecosystems. Over the last few decades, fuel treatments have been widely applied to restore forest structure and mitigate fire hazard, but prescriptions often do not explicitly consider regeneration dynamics. The increasing ubiquity of fuel …
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Stand Dynamics in a Southern Appalachian Montane Pine Barren, Warm Springs Mountain, Virginia
… Dominated by early successional fire adapted species, such as dwarfed Pinus rigida (Mill.) and Quercus ilicifolia (Wangenh.), this shrubland is home to numerous rare plants and invertebrates. We used vegetation analysis and dendrochronology to document establishment and recruitment …
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Demografía y ecología evolutiva del subarbusto carnívoro Drosophyllum lusitanicum (L.) Link. (Drosophyllaceae)
… threats to the viability of disturbance-adapted species and therefore causing biodiviersity loss. With fires regularly affecting 50 % of the Eath’s surface, such compounded effects of disturbance interactions are particularly prominent in fire-prone ecosystems. Using the rare carnivorous …
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Effects of Barren Reservoir on Upstream Fish Assemblages of Barren River Tributaries
… fishes, and the influence of introduced species often stocked into reservoirs. It has not been until relatively recently that the upstream effects have been studied. The central theme here is that while the dam proper creates a barrier it is possible that the resulting zone of standing …
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The effectiveness of urban conservation programs for engaging the public and enhancing wildlife habitat
… often displace native, human-sensitive species and replace them with exotic and human-adapted species. Urban residents also have limited access to natural areas, which may limit public support for conservation. Given these challenges, effectively engaging the public in conservation …
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Effects of annual thermal regime on growth trajectories of native age-0 brook trout (Salvelinus Fontinalis)
… to withstand warm summer temperatures. For cold-adapted species such as brook trout (<em>Salvelinus fontinalis</em>), the long-term success of the species will depend on its ability to cope with, and adapt to, rapidly changing thermal conditions. The current study evaluated growth patterns of …
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Physiological costs of total cholesterol in European starlings across an urban to rural gradient
… starlings (<em>Sturnus vulgaris</em>)—an urban adapted species—across an urban and a rural site. We ask: (1) do urban starlings have elevated cholesterol, (2) does elevated cholesterol come at a physiological cost to birds, and (3) to what extent are parental and nestling cholesterol correlated? …
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A damming history: an analysis on the legacy effects of beaver dams on the composition and structure of a montane riparian ecosystem
… that historic beaver dams supported more wetland-adapted and less disturbance-tolerant plant communities. Notably, shrub cover at historic dams was similar to that of exclosed sites. In contrast, upland, disturbance-adapted species dominated areas of historic beaver activity where dams were not …
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Comparing four indices of physiological stress in an urban-adapted songbird between urban and rural habitats
… variation in the extent to which different species tolerate life in urban habitats, yet it remains unclear why some species thrive while others cannot. My work explores possible phenotypes that make an urban-adapted species, the European starling (<em>Sturnus vulgaris</em>), so successful in …
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Cities for birds, birds for cities: The urban ecology of birds across scales from global sampling to individual responses
… monitoring framework to city-level drivers of species prevalence and individual behavioural responses to human activity in an urban songbird. In Chapter 2, I describe and validate the Global Urban Bird Survey, a standardized acoustic monitoring protocol applied across multiple cities to …
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THE CLIMATIC, BIOTIC AND TECTONIC EVOLUTION OF THE PALEOGENE RENOVA FORMATION OF SOUTHWESTERN MONTANA
… by the elimination of subtropical plant species, the establishment of dry-adapted species and by paleoclimate parameters calculated from leaf physiognomy. Geodynamic calculations and field data indicate that the Renova Formation was deposited in a series of sub-basins separated by relict …
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THE CLIMATIC, BIOTIC AND TECTONIC EVOLUTION OF THE PALEOGENE RENOVA FORMATION OF SOUTHWESTERN MONTANA
… by the elimination of subtropical plant species, the establishment of dry-adapted species and by paleoclimate parameters calculated from leaf physiognomy. Geodynamic calculations and field data indicate that the Renova Formation was deposited in a series of sub-basins separated by relict …
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DISEASE IMPACTS ON MOOSE (ALCES ALCES) HEALTH AND ECOLOGY ALONG THEIR SOUTHERN RANGE LIMITS: PARASITES AS A LIMITING FACTOR IN NEW YORK
Moose (Alces alces) are a cold-adapted species with circumpolar distribution. Populations along their southern range limits in North American have fluctuated repeatedly and contend with varied and likely interacting stressors, including climate change, habitat alteration, conflict with humans, and …
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The St. Louis site (FfNk-7) and the Below Forks site (FhNg-25) : the faunal analysis of two mummy cave series and Oxbow Complex sites in central Saskatchewan
… would have made both Boreal Forest and Grassland adapted species available for exploitation and may be a possible explanation for the diversity of species seen at the site. Further paleoenvironmental research will be necessary in continuing studies into subsistence practices used during these time …
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The Physiological Response of sub-Arctic Lichens to Their Abiotic Environment
… of sample thalli, of four sub-Arctic lichen species from Abisko, Sweden (68.37˚N, 18.69˚E). Nephroma arcticum, Cladina mitis, C. stellaris and C. rangiferina, which are found in contrasting niche habitats within the same ecosystem, have been studied. An oxygen electrode apparatus has been …
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Investigating the potential of South African Entomopathogenic nematodes for the management of Ceratitis capitata (Wiedemann)
… nematodes (EPNs), particularly locally adapted species which may have enhanced field performance. However, despite South Africa’s rich EPN diversity, very limited research has evaluated the efficacy of local isolates against C. capitata, especially across key life stages and soil …
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PLANT AND ARTHROPOD COMMUNITIES OF ALPINE ICE-RELATED LANDFORMS: ECOLOGICAL AND BIOGEOGRAPHIC IMPORTANCE
… and periglacial habitats – refugia for a cold-adapted and threatened biodiversity - because of the lack of knowledge that still affects these habitats (Gobbi et al. 2021). The study points out the urgency in planning this research due to the risk of total disappearance of these habitats in the …
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Microbial communities and their response to Pleistocene and Holocene climate variabilities in the Russian Arctic
… of methanogenic archae. Methanosarcina-related species were abundant throughout the Russian Arctic and were able to adapt to changing environmental conditions. In contrast, members of Methanocellales and Methanomicrobiales were not able to adapt to past climate changes. This PhD thesis provides …