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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An investigation of certain waterfowl food plants and a botanical survey of Back Bay National Wildlife Refuge, Princess Anne County, Virginia

Chamberlain, Edward B. January 1948 (has links)
The vegetation characteristic of the Back Bay area is largely Austroripariam. On the Back Bay National Wildlife Refuge about 330 species and varieties of 198 genera from 76 families were found. Of these plants, five are important submerged aquatic water-fowl foods and twenty-four are emergent or marsh food species. The present production of submerged waterfowl food plants is much below the potential for the area, though somewhat greater than in past years. The factor now most responsible for this limited growth is turbidity of the water. The chief cause of turbidity is wave action due to wind. The action of carp is a secondary cause. In the view of the extreme difficulties and expenses of controlling turbidity, no management practices can be recommended for increasing the growth of submerged aquatics other than continued prevention of pollution and maintenance of as low a carp population as possible. Marsh management, on the other hand, is thought to offer good possibilities for benefitting waterfowl conditions on the area. Therefore, it is believed that any management efforts to improve waterfowl food plant conditions on Back Bay can be more profitably applied to marsh and emergent species than to submerged aquatic species. / M.S.
2

Habitat utilization of marsh and adjacent submerged landscape by fish and macroinvertebrates in a Gulf of Mexico tidal oligohaline environment

Offner, Tia 08 December 2023 (has links) (PDF)
Estuarine habitats are considered nursery habitats for fishes and invertebrates, but oligohaline environments are critically understudied. Using a seine net and fyke nets, we sampled Back Bay, Mississippi (USA), a low salinity estuary, once a month for a year to explore the temporal use of the marsh and adjacent submerged landscape by nekton species. We also looked at whether there is evidence of habitat preference in the most numerous nekton species. We used a novel habitat usage index (HUI) to compare seine and fyke net catches of our top 10 species, and evaluated catch size in relation to maturation size. Consequently, we noted marked differences in 48 nekton species in terms of habitat preference; observed, for our top 10 species, transient species were primarily immatures, and resident species mostly occurred in marshes with some exceptions; and detected size patterns consistent with the spawning cycle of the species in question.
3

Watershed Based Analysis of Fecal Coliform within the Back Bay of Biloxi and its Surrounding Streams

Renick, Matthew Edward 04 August 2001 (has links)
In the development of the watershed, hydrodynamic, and water quality models for Back Bay of Biloxi in Mississippi, the Better Assessment Science Integrating Point and Nonpoint Sources (BASINS 2.0) - Nonpoint Source Model (NPSM) was selected as the watershed model. The hydrodynamic and water quality models DNYHYD5 and EUTRO5 were selected as the tidally influenced bay models. The watershed model simulated nonpoint source flow and pollutant loadings for all sub-watersheds, routed flow and water quality, and accounted for all major point source discharges in the Back Bay of Biloxi watershed. Time varying output from the watershed model was applied directly to the Back Bay of Biloxi model. The Bay models, in turn simulated hydrodynamics and water quality, including water depth, velocities, and fecal coliform concentrations. Both watershed and Bay models were calibrated and verified against observed data. The calibrated/verified model was used as a planning tool to assess the water quality in the Watershed and the Bay as well as for calculating Total Maximum Daily Load (TMDL) and Waste Load Allocation (WLA).
4

Coastal Fortresses: A Cross-Case Analysis of Water, Policy, and Tourism Development in Three Gulf Coast Communities

Krupa, Kimberly A 23 May 2019 (has links)
As a result of development pressures and water resource struggles, once rural, spatially segregated coastal commercial fishing villages along the U.S. portion of the Gulf of Mexico are increasingly tourist frontiers for elites and the emergent businesses that cater to them. Over the course of the twentieth century, water events, from coastal land loss to hurricane destruction to natural disaster, have fast-tracked development projects that have allowed for the expansion of the tourism sector, and relaxed policies to encourage bold new economic development initiatives that often put poor coastal communities and their environment in jeopardy. This outcome is not universal across the northern Gulf Coast, but contingent on a number of local factors overlooked in the literature on coastal tourism and water policy development. This paper investigates the local nuances that have emerged as responses to global and regional development pressures by focusing on the ways in which local values and policy decisions have influenced the spread of coastal urbanization. An intensive analysis will examine the layered effects of changing land-use patterns and tourism growth pressures on three at-risk coastal communities in Louisiana, Mississippi and Florida, in the United States. This paper will test the hypothesis that coastal communities affected by a similar set of development pressures respond to these forces in different ways, depending on complex local and regional variabilities. The paper’s focus is centered on Northern Gulf Coast tourism growth patterns from post-World War II through 2018, and employs a mixed method, multiple-sited case-study design.

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