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 19 of 19 for “"habitat mapping"”.
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Habitat Mapping and Predator-Prey Dynamics in Ohio Resevoirs
Mechanisms associated with habitat choice in fish are often unknown, and require exploration of many different abiotic and biotic habitat features. The importance of finding these drivers lies in helping to explain population variation. Saugeye Sander vitreum ¿ X S. canadense ¿ are stocked with …
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Upper slope geomorphology of Sardinian southern continental margin, applications to habitat mapping supporting marine strategy
… on Sardinian southern continental margins marine habitat mapping. Aim of this thesis is to produce predictive marine habitat mapping, starting from a detailed geomorphologic study integrated with biological and oceanographic data coming both from original direct surveys than from bibliographic …
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BENTHIC HABITAT MAPPING OF MOUNTAIN TOP BANK WITHIN THE NORTHERN GULF OF MEXICO THROUGH INTEGRATED GEOPHYSICAL AND VISUAL DATA ANALYSIS
… ecosystem that should be prioritized for future mapping and ecological studies. Priority should be given to them because they possess natural, social, and economic values, and face a variety of threats, all of which, if not better understood will result in the loss of this unique ecosystem. …
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Development and validation of spatial distribution models of marine habitats, in support of the ecological valuation of the seabed
… organisms related to it (together called a ‘habitat’). Therefore, ‘habitat mapping’ is crucial, not only for the assessment of the ecological value at a certain moment, but also to follow its evolution over time. Because of the world-wide application of marine habitat mapping, there is …
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Habitat Suitability and Availability for Rainbow Trout (Oncorhynchus mykiss) in the Canyon Reservoir Tailrace and Evaluation of Side Scan Sonar for Habitat Mapping in a Semi-Wadable River
… the southeastern United States to mitigate fish habitat and assemblage alterations caused by large impoundments. Hypolimnetic discharges from Canyon Reservoir have created conditions suitable for a coldwater tailrace fishery and trout have been stocked there since 1966. Changes in habitat …
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Characterization of Natural and Anthropogenic Seabed Features in the Southwestern Baltic Sea
… the seabed's physical characteristics, benthic habitat distribution, and the extent of human impacts. Seabed pressure assessments typically rely on large-scale proxy data, overlooking actual impacts and the long-term effects of human activities on the seafloor. Also, while habitat mapping …
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Quantitative Comparison of Benthic Habitat Maps Derived From Multibeam Echosounder Backscatter Data
… achieve the identification, classification and mapping of seabed types and of benthic habitats. These approaches, commonly grouped under the denominations of Benthic Habitat Mapping or Acoustic Seabed Classification, exploit the latest scientific and engineering advancements for the exploration …
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Marine Aggregate Dredging: A New Regional Approach to Environmental Monitoring
… Sediments and Benthos, Recovery, Restoration, Habitat Mapping and Natural Variability. The essay then describes the current approach to monitoring, together with its limitations. This is followed by a description of the new monitoring approach, with an explanation of why it is considered more …
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From Representative Period Selection to Process‐Based Sediment Dynamics
… in coastal management, nourishment design, and habitat mapping.
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Assessing wildlife habitat suitability for ecological sites and state and transition models
Wildlife habitat is an important component of rangeland management plans. Unfortunately, there are few practical tools to assist managers in understanding how management and environmental variation affects habitat suitability. Ecological site descriptions (ESDs) have the potential to fill this role …
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Satellite image classification and spatial analysis of agricultural areas for land cover mapping of grizzly bear habitat
Habitat loss and human-caused mortality are the most serious threats facing grizzly bear (Ursus arctosi L.) populations in Alberta, with conflicts between people and bears in agricultural areas being especially important. For this reason, information is needed about grizzly bears in agricultural …
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Submerged habitats from space: increasing map production capacity with new methods and software.
Thematic maps of submerged coastal habitats are essential to ecological studies and marine spatial planning processes. The analysis of multispectral satellite imagery provides a cost effective method for mapping shallow habitats. However, the interaction of light with the water column greatly …
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The effectiveness of Autonomous Underwater Vehicles (AUVs) for mapping and monitoring the seabed – a novel toolkit for marine management
… the marine environment, including its diverse habitats and ecosystems, to be managed appropriately. Underpinning all marine management is a baseline knowledge of the physical and biological components of the benthic environment. The usual method of obtaining this data is through seabed mapping …
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Using biological traits analysis to investigate ecological functioning of cold-water coral reefs
… conducted on coral reefs by the Norwegian habitat mapping program MAREANO (www.Mareano.no) were used to investigate taxonomic and trait differences between nine reef sites off the coast of Norway. The relationships between taxa found at the sites and the environmental conditions were …
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Breeding ecology and related life-history traits of the hoatzin, Opisthocomus hoazin, in a primary rainforest habitat
… of the hoatzin’s nesting ecology in a rainforest habitat. From 1995-1998 and in 2000 I monitored a hoatzin population which consisted of approximately 700 individuals in an Amazonian rainforest in Ecuador situated in the Cuyabeno Wildlife Reserve (between 0°02’ N, 76°0’ W, 0°03’ S, and 76°14’ W). …
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Mapping and Assessment of changes in ecosystem service delivery - a historical perspective on the Tweed catchment, Scotland - UK
… river catchments and their constituent habitats have been altered and modified through various human activities to maximise provision of tangible benefits like food and water, while impacting on their capacity to provide other less obvious but equally important benefits for human …
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Impacts of flood-mediated disturbance on species of High Nature Value farmland
… as indicator taxa of biodiversity, I carried out habitat mapping, and I estimated disturbance through both field measurements and remotely sensed data. My first study was around the Pripyat river in Ukraine, which has a large floodplain that has had minimal human intervention. I found that …
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Algorithm development for characterizing coastal and inland aquatic environments using satellite remote sensing
… pressures, which alter water quality, disrupt habitat integrity, and threaten public health. These transformations occur across broad spatial and temporal scales, demanding integrated, scalable, and timely monitoring systems. Satellite remote sensing has emerged as a promising tool for …
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Detecting Coastal Marsh Change from Aerial Imagery using Spectral and Textural Methods: Pascagoula River Estuary, Mississippi, 1955-2014
<p>As sea level rise accelerates, coastal marsh ecosystems are increasingly vulnerable. Vertical accretion rates must exceed or keep pace with rates of sea level rise to prevent transition to open water or inland migration of marsh vegetation. While some marsh systems along the northern Gulf of …