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 “"riverscape"”.
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Relative Roles of Environmental Conditions and Riverscape Connectivity On Fish Metacommunity Structure
<p>An understanding of how riverscape connectivity influences species assemblages has been identified as critical for effective conservation management and restoration of fish communities in dendritic river networks. This study investigates the relative roles of abiotic conditions and spatial …
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Spatial Drivers of Ecosystem Structure and Function in a Floodplain Riverscape: Springbrook Nutrient Dynamics
On riverine floodplains, reorganization by fluvial processes creates and maintains a mosaic of aquatic and riparian landscape elements across a biophysical gradient of disturbance and succession. I hypothesized that ecosystem processes in spring brooks would differ spatially across biophysical …
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Spatial Drivers of Ecosystem Structure and Function in a Floodplain Riverscape: Springbrook Nutrient Dynamics
On riverine floodplains, reorganization by fluvial processes creates and maintains a mosaic of aquatic and riparian landscape elements across a biophysical gradient of disturbance and succession. I hypothesized that ecosystem processes in spring brooks would differ spatially across biophysical …
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Modeling Water Temperatures and Brook Trout (Salvelinus fontinalis) Growth Potential Within a Complex Appalachian Riverscape
Climate change is expected to cause air temperatures to increase 2-5°C in the Appalachians throughout the 21st century. These air temperature increases will cause water temperatures to increase, and may negatively effect cold and cool water fish species. Brook trout are an important game fish …
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Local and regional controls of brook trout (Salvelinus fontinalis) metapopulation dynamics within a complex Appalachian riverscape
… precipitation. For my dissertation, I adopted a riverscape approach to better understand which factors limit brook trout productivity within this historically productive watershed. In particular, my dissertation is strongly focused on factors that limit brook trout use of the supplementary …
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Riverscape Community Genomics of Ozark Fishes: A Comparative Framework to Infer Ecological and Evolutionary Determinants of Genetic Diversity
<p>Genetic variation is a crucial component of biodiversity and represents the variability and spatial structure of alleles within and among organisms. Evolution modulates this variability over time through mutation, selection, gene flow, and genetic drift. However, our capacity to test …
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The influence of hydraulics, hydrology and temperature on the distribution, habitat use and recruitment of threatened cyprinids in a Western Cape river, South Africa
… flow and fish ecology in the context of the riverscape model of river ecosystems by examining the seasonal distribution of two endangered fish species, i.e. the Clanwilliam yellowfish and Clanwilliam sawfin, in relation to their physical (structural) and hydraulic habitat requirements at …
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The development of geomorphic and hydraulic complexity within streams and its influence on fish communities following glacial recession in Glacier Bay, Alaska
… resulting in increased geomorphic, hydraulic and riverscape diversity. Determination of these changes in hydromorphic complexity which occur as streams develop, twinned with an assessment of the role of coarse woody debris in creating such complexity at the reach and microscale levels revealed the …
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Status and Distribution of Fishes in Tributaries of the Garrison Reach of the Missouri River, North Dakota
… and management of regulated rivers requires a riverscape approach (e.g. linking reservoirs, mainstem rivers, and tributaries) to develop adaptive management plans. The Missouri River in North Dakota was impounded in 1956, creating a highly regulated intra-reservoir section with mainstem …
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Damming the Nation: How Engineers Transformed Rivers into Water Tanks for Modern South Korea
… areas. I ultimately argue that the modern dammed riverscape of the nation is the product of engineers' precarious and contested efforts to build their own professional identities and research programs in developing South Korea. This contextualization of river engineering allows us to examine the …
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Food webs in the lower Waikato River and the role of hydrogeomorphic complexity
… they may add to the lateral complexity of the riverscape, permanently connected habitats such as tributary junctions do not necessarily contribute to overall food web complexity. In this study tributary junctions tended to be steep-sided, and complex littoral habitats containing woody debris …
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MANAGEMENT AND LIFE HISTORY CONSEQUENCES OF HYBRIDIZATION BETWEEN WESTSLOPE CUTTHROAT TROUT (ONCORHYNCHUS CLARKII LEWISI) AND RAINBOW TROUT (ONCORHYNCHUS MYKISS)
… threatened by hybridization?</p> <p>The riverscape context plays a substantial role in the distribution of hybrids, as estimates of introgression declined with increases in stream slope, elevation, and distance from a primary source of RBT, three correlated landscape variables. Spatial …
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MANAGEMENT AND LIFE HISTORY CONSEQUENCES OF HYBRIDIZATION BETWEEN WESTSLOPE CUTTHROAT TROUT (ONCORHYNCHUS CLARKII LEWISI) AND RAINBOW TROUT (ONCORHYNCHUS MYKISS)
… threatened by hybridization?</p> <p>The riverscape context plays a substantial role in the distribution of hybrids, as estimates of introgression declined with increases in stream slope, elevation, and distance from a primary source of RBT, three correlated landscape variables. Spatial …
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Eco-hydro-morphodynamics and ecosystem services of near-natural river corridors
… research activity deals with the need to improve riverscape science and landscape management dialogue and the valuation of river ecosystem services. Focusing on inland waters ecosystem services, we integrate a socio-cultural approach with spatial analysis for cultural ecosystem services supply …
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A Riverine Ecosystem Service Cascade Model (RESCaM) framework for assessing ecosystem service provision as applied to English geomorphic river types
… Riverine ecosystem services are derived from riverscapes whereby "hydrological, geomorphological and ecological linkages and pathways of water, sediment and biogenic matter drive the relationship between river processes and physical habitat character and ecosystem services" (Large and Gilvear, …
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Environmental Factors Associated With Long-Term Trends of Mountain Sucker Populations in the Black Hills, and and Assessment of Their Thermal Tolerance
… introduction of non-indigenous fishes, and riverscape changes resulting from impoundment of large river systems. Understanding population trends and addressing the causative factors involved in species declines is critical to recovery and management actions. Mountain sucker Catostomus …
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GEOARCHAEOLOGICAL AND PALAEOENVIRONMENTAL RECONSTRUCTION OF THE HOLOCENE CLIMATE-ENVIRONMENTAL-HUMAN NEXUS IN THEKURDISTAN REGION OF IRAQ
… the dynamic of local rivers and the submerged riverscape of the Tigris River along the Mosul Dam Lake and identify the main hydrological, geomorphological changes regulated by seasonal variations of the discharge and the litho-structural control on the size and direction. Paleoclimatic data …
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The Urban Oasis - [RE]-Generating Centurion Lake Through Resource Exchanges
… ways in which river spaces interact with the riverscape and in addition indicates how flood prevention mechanisms could be designed to enable the users to interact with the water as opposed to avoiding the beauty that nature provides in its domain.