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 8 of 8 for “"sampling scale"”.
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Sampling scale sensitivities in surface ocean pCO2 reconstructions in the Southern Ocean
… this role is poorly understood. The seasonal sampling biases have hampered observation-based reconstructions of partial pressure of CO2 at the surface ocean (pCO2) using machine learning (ML) and contributed to the convergence of the root mean squared errors (RMSEs) of ML methods to a common …
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The genetic structure of New Zealand's coastal benthos: using the estuarine clam Austrovenus stutchburyi, to determine rates of gene flow and population connectivity
… gene flow among estuaries, I conducted a multi-scale genetic analysis of A. stutchburyi populations on New Zealand’s west coast Analyses of COI and microsatellite loci showed populations to be well connected within estuaries and at the regional sampling scale (≤ 156 km) although not at a …
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The colonisation of canola crops by the diamondback moth, Plutella xylostella L., in southern Australia
… P. xylostella populations despite a geographic sampling scale > 3000 kilometres, reflecting a recent range expansion and/or high gene flow and confirming a previous microsatellite assessment. In a three year study, wild brassicaceous potential host plants were sampled for P. xylostella in …
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Vegetation-environment relationships in a subalpine wet meadow and a brackish tidal marsh
… of plant species composition, and aspects of scale were examined and compared between a brackish tidal marsh in the Squamish estuary and asubal pine wet meadow in Garibaldi Park in southwestern British Columbia. Vegetation abundance, soil variables, and ground elevation data were collected …
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Vegetation ecology of springs: ecological, spatial and temporal patterns
… niche attributes were found to be a matter of sampling scale. Larger plot sizes (grain) weakened the species-environment relationship, what consequently resulted in broader niche amplitudes. In contrast, the grain did not influence the species’ pH optima. Monitoring approaches that target to …
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Multiscale patterns of mammal diversity and occurrence in the Karoo
… indigenous wildlife is the lack of updated, multiscale foundational biodiversity data. To address this knowledge gap, my thesis evaluates the distribution and ecology of the mammalian (>0.5kg) community across the Karoo, with a focus on developing potential methods that can effectively record both …
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Patterns of temporal changes in species composition and diversity in island ecosystems
… an endeavor to investigate small spatial scale patterns as well 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 …
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Developing A Geospatial Protocol For Coral Epizootiology
This dissertation explores how geographic information systems (GIS) and spatial statistics, specifically the techniques used to map, detect, and spatially analyze disease epidemics, could be used to advance our understanding of coral reef health. Given that different types of spatial analysis, as …