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 18 of 18 for “"vegetation succession"”.
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Vegetation Succession and Environmental Relations at the Illisarvik Drained Lake Experiment, Western Arctic Coast, Canada
… sites within and surrounding the basin to study vegetation succession. These surveys extended previous records provided by L. Ovenden for 1985, 1993, and 2001. The vegetation at Illisarvik indicated a gradual shift towards undisturbed tundra species but was still compositionally distinct in 2016. …
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The nature and significance of microtopographic effects on vegetation succession on selected glacier forelands, Jotunheimen and Jostedalen, Norway.
… prevailing micro-environmental factors and vegetation, with particular reference to succession, on six glacier forelands at successively higher altitudes. The study is successful in answering the three main aims of the thesis: by analysing the specific environmental parameters comprising the …
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The effects of habitat change on bird diversity and community structure in a mesic Savanna landscape
… in order to control ecosystem processes such as vegetation succession (Richards ef al. 1999). The relationship between disturbance, succession, vegetation change and habitat heterogeneity is crucial to managers because together they can influence biodiversity. For example, a break in the …
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Vegetation colonization within exposed reservoirs following dam removal on the Elwha River, Washington
… large dam removals to date, so studies assessing vegetation succession on exposed reservoir sediments are limited. My research aims to assess how environmental factors within exposed reservoirs affect vegetation succession following removal of two dams on the Elwha River, Washington. In addition, …
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Modelling hydrologic system change in a paraglacial catchment in the Northern Rocky Mountains
… losses due to climatic warming, and the rates of vegetation succession are often unable to keep up with the rate of warming. Basin scale analyses of glacial recession on streamflow are then confounded by ecohydrologic dynamics created by primary succession and the associated increase in …
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Botanical processes in urban derelict spaces
… in the West Midlands. Experimental work included vegetation surveys, soil seed bank investigation, field mapping and seed rain trapping methods. Interpretation of the data involved a range of approaches including vegetation classification and ordination, comparative analysis of plant functional …
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Pollen stratigraphy of Holocene peat sites in Eastern Liguria, Northern Italy
… project designed to reconstruct the Holocene vegetation history of eastern Liguria. The study area lies within the northern Apennines, a region from which few detailed late Quaternary palaeoenvironmental records had boon published and prior to this study no radiocarbon-dated pollen profiles …
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Calluna vulgaris regeneration on upland moorland post-wildfire.
… particularly in drought years, which destroy all vegetation, seed bank and surface peat. Post-fire management of liming, fertilising and seeding with grass species and Calluna vulgaris (ling heather), in addition to natural regeneration, often fails to fully re-vegetate the bare burnt peat, …
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Factors affecting piping plover (Charadrius melodus) nest site selection following landscape and predator community changes
… on Fire Island, New York, assessing changes in vegetation succession, plover nesting habitat selection, and suitable nesting habitat availability from 2010 until eight years after Hurricane Sandy. We analyzed classified imagery to quantify vegetative cover changes across the landscape and at …
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Spring Dispersal and Breeding Ecology of Northern Bobwhite in Southwest Ohio
… to offset annual mortality. Providing early successional woody cover within landscapes could improve annual survival and reverse bobwhite population declines in the Midwest. Early successional woody habitat was highly selected at multiple spatial scales during the breeding season. Bobwhites …
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A 210,000-year reconstruction of subtropical climates from Fern Gully Lagoon, North Stradbroke Island (Minjerribah), Australia
… lipid biomarker records as indicators of wetland vegetation assemblages during recent interglacial complexes and the Holocene, allowing reconstruction of relative moisture availability, changes in fire frequency and approximate mean annual air temperatures (Chapters 4 and 5). Relatively high …
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Revegetation of two drained reservoirs on the Elwha River ten years after dam removal
… While several studies have examined the revegetation of these drained reservoirs, none have gone beyond 5 years since dam removal. These studies found that sediment grain size and reservoir landform (valley walls, terraces of reservoir sediment, and active riparian zones) were important …
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Drivers of landscape evolution in northern ecosystems: Shrub expansion, vegetation-fire interaction, and permafrost degradation
… nutrients by removing and breaking down existing vegetation and organic matter, letting tall shrubs expand their range. Patterns tundra landscape evolution are complex, as the tundra of Alaska is far from a monolith, instead displaying extreme heterogeneity, from macro to micro-climate and …
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ASSESSING AND IMPROVING BIODIVERSITY OUTCOMES FOR TROPICAL FOREST RESTORATION
… forests often vary strongly across space in vegetation structure and species composition. Most evaluations of biodiversity outcomes of restoration do not explicitly consider how this natural heterogeneity should inform the identification of biodiversity baselines or targets. Ultimately, …
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Hurricane and human-induced habitat changes on Fire Island and Westhampton Island, New York, and the effects on breeding piping plovers (Charadrius melodus)
… data from four post-hurricane habitat types. Vegetation cover increased across all habitat types, especially in manipulated (30.1% increase) and natural overwashes (37.9% increase), while dry sand for nesting declined by 8%. Vegetation density indices were higher in natural overwashes than …
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The modeled effects of fire on carbon balance and vegetation abundance in Alaskan tundra
… carbon could depend upon the effects of fire on vegetation, specifically concerning the speed at which vegetation reestablishes, the stimulation of growth after fire, and the changes that occur in species composition during succession. While rapid regeneration of graminoid vegetation favors the …
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Patterns of temporal changes in species composition and diversity in island ecosystems
… as short- and long-term temporal patterns of vegetation, functional diversity and community assembly on two young islands (Palea Kameni, PK and Nea Kameni, NK) of Santorini Archipelagos in Greece, which consist the result of subaquatic volcanic activity. These two islands differ on geological …