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.
Results
Showing 1 to 20 of 30 for “"Biodiversity patterns"”.
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Spatial urban and peri-urban biodiversity patterns
… of land use change, habitat fragmentation and biodiversity loss. However, urban areas should not be considered as “ecological deserts”. Instead, they have the potential to support diverse communities, on condition that suitable habitat patches occur. To reach adequate management decisions and …
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The ecological and evolutionary drivers of spatial biodiversity patterns
… dramatically from place to place. These spatial patterns of biodiversity are the focus of biogeographical and macroecological research and offer us clues into the evolutionary processes shaping nature's variety. Finding general patterns and their underlying drivers, however, is not a …
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The ecological and evolutionary drivers of spatial biodiversity patterns
… dramatically from place to place. These spatial patterns of biodiversity are the focus of biogeographical and macroecological research and offer us clues into the evolutionary processes shaping nature's variety. Finding general patterns and their underlying drivers, however, is not a …
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Biodiversity patterns in False Bay: an assessment using underwater cameras
Understanding how marine biodiversity is distributed, and what drives these patterns, relies on good descriptions of marine ecosystems. This information should inform the protection of biodiversity and guide its management. Relationships between marine landscapes and biodiversity therefore need to …
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Biodiversity patterns of wetland macroinvertebrate assemblages in the South-Western Cape, South Africa
… vacuum, this study was conducted to investigate biodiversity patterns of wetland macro invertebrates assemblages in the south-western Cape, South Africa. 140 wetlands were sampled in four geographic clusters, the Cape Flats, the West Coast, the Cederberg and the Agulhas Plain. Open-water, …
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The influence of sampling method on detecting benthic biodiversity patterns at the ecoregion scale on the South African west coast
… classification, yet the consistency between biodiversity patterns detected by each sampling method has not yet been explored. The aim of this thesis is to determine the influence of sampling method on the detection of benthic biodiversity patterns. This was explored using demersal trawl and …
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Detection and prediction of biodiversity patterns as a rapid assessment tool in the tropical forest of East Usambara, Eastern Arc Mountains, Tanzania
… The field data, part of the Tanzanian National Biodiversity Database, were collected by Frontier-Tanzania between 1999 and 2001, through the East Usambara Conservation Area Management Program, Government of Tanzania. The field data used are rapidly collectible by people with varied backgrounds …
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Assessing processes of long-term land cover change and modelling their effects on tropical forest biodiversity patterns – a remote sensing and GIS-based approach for three landscapes in East Africa
… land cover changes and their influence on forest biodiversity patterns are needed. However, few remote sensing studies have accounted for all of the following aspects at the same time: (i) a dense temporal sequence of land cover change/forest fragmentation information, (ii) the coverage of several …
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Use of demersal bycatch data to determine the distribution of soft-bottom assemblages off the West and South coasts of South Africa.
… aims to analyse information on invertebrate biodiversity patterns of the offshore benthos around South Africa. Samples were collected as bycatch from demersal trawl surveys conducted along the South (one cruise) and West Coasts (two cruises).
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Environmental granularity, rivers and climate history as shaping factors for species' distribution and diversity patterns
… given species' dispersal capabilities. Biodiversity patterns have been explained by: environmental heterogeneity, latitudinal gradients, system energy, and biogeographic history among others. Several attempts have been made to replicate biodiversity using spatially and environmentally …
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Evolutionary Assembly of the Neotropical Montane Avifauna
… fundamental processes are thought to underlie biodiversity patterns: speciation, dispersal, and extinction. Biodiversity patterns in species-rich tropical mountains vary along horizontal (barriers), and vertical (elevation) dimensions. In this dissertation, I set out to explore the interplay …
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Dynamics of two South African floodplain forests
… diversity because of the interaction of biodiversity patterns, disturbance regimes and environmental gradients therein. They stabilise migrating river channels and ameliorate hydrological extremes. Concern is growing over the degradation of riparian environments through upstream …
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Patterns of Taxonomic, Functional, and Phylogenetic Diversity, and Ecological Drivers of Stream Fish Assemblages in East Texas
… in East Texas contain a rich freshwater biodiversity, with the Neches and Sabine River basins supporting some of the greatest freshwater fish diversity in the state. Given the heterogeneity of habitats and species diversity, these rivers serve as excellent natural systems for examining …
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Marine ecosystem classification and conservation targets within the Agulhas ecoregion, South Africa
… Africa, limiting understanding of community biodiversity patterns and their environmental drivers. This is one of the first studies to (i) visually investigate marine epifaunal community patterns and their environmental drivers along the Agulhas ecoregion outer shelf, shelf edge and upper …
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Comparative Phylogeography of Glassfrogs (Vitreorama) Endemic to the Brazilian Altantic Rainforest
… of both climate and landscape in shaping current biodiversity patterns has been the focus of many recent phylogeographic studies. Here I explore multiple factors thought to have impacted the generation of local diversity in the Brazilian Atlantic Forest (AF) using two montane, stream-associated …
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Ecology and taxonomy of free-living marine nematodes from Cienfuegos Bay, Caribbean Sea
… the Caribbean Sea; but, we also provided data on biodiversity from other areas in Cuban marine waters. Four main topics are included: description of biodiversity patterns, a microcosm experiment about effects of organic enrichment on assemblages, a taxonomic revision of the genus Terschellingia de …
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Bats and the city : urban bat biodiversity in a tropical biome transition zone
… to wildlife. Our understanding of urban biodiversity patterns and their driving factors in tropical cities which interact with high levels of biodiversity is limited, yet it is pivotal to developing efficient and effective conservation guidelines for urban planning. This study uses a …
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Hide and seek : a multidisciplinary study on the ecological success of an estuarine dweller
… trophic opportunist. Its diet reflected local patterns in prey item distributions, and the variation in its stomach content was evaluated as a tool for the assessment of heavy metal pollution impacts and fish biodiversity patterns in European estuaries for the first time. Overall, the results …
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Landscape genomics of tropical high altitude plant species
… frequencies within populations, leading to patterns of genetic restructuring. The specific genetic structuring patterns that will be observed as a consequence depend on explicit geographical features, such as topography and latitude. Over the first decades of phylogeography, the effect of …
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ECO-LENS Addressing Urban Biodiversity with Machine Learning
The link between global climate change and biodiversity is well recognized. Humandriven destruction and degradation of ecosystems amplify the negative and complex impacts of climate change, increasing the strain on remaining ecosystems and wildlife. Therefore, it is essential for climate change …
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