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 20 of 336 for “"intertidal"”.
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The resilience of biofilm on an intertidal mudflat
… was to determine the resilience of biofilm on an intertidal mudflat following a physical disturbance. Over the last decade the presence and importance of biofilm on intertidal mudflats has been a focus of scientific research as biofilm has been shown to play key physical and ecological roles in …
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Potential Wave Impacts On Shorelines In Intertidal Waterways
… balance along coastal shorelines. Within the intertidal waterway of Jacksonville, Florida, the primary processes acting on the shoreline are tidal currents and waves generated by winds and passing vessels. This study focuses on the analysis of vessel-generated waves and their possible effects …
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Distribution and abundance of soft-sediment intertidal Polychaetes
Polychaetes are important components of the intertidal sandflat community in Lawson’s Flat, Dillon Beach, California. Little is known about the factors that control the relative abundance of these species. In view of the extensive evidence of the importance of interactions between component species …
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Climate Change and Biogeography In the Marine Intertidal
… poleward biogeographic contractions. The marine intertidal zone is a physically rigorous habitat that may serve as a model system for the effects of climate on biogeography. Organisms residing here are exposed to a suite of stressful abiotic factors, are exposed to both water and aerial …
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Intertidal mudflats and the conservation of migratory shorebirds
Migratory shorebirds rely on intertidal habitats that are increasingly threatened by habitat loss, human disturbance, and climate change. Investigating habitat availability, its influence on shorebird populations and how to prioritise conservation efforts is critical to inform conservation …
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Spatial and temporal variations in rocky intertidal communities
This thesis attempts to give an understanding of intertidal conditions in the Cape Peninsula in terms of spatial and seasonal variations in rocky shore communities and falls into two distinct parts: 1. A general survey of intertidal conditions and an investigation of the interactions of certain …
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Tropic interactions within South African intertidal mussel beds
Community structure of intertidal rocky shore mussel beds has been previously shown to be strongly influenced by trophic interactions, particularly interactions between predators of mussels and their prey. This investigation involved, firstly, construction of models to simulate trophic interactions …
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Effect of exposure on the erodibility of intertidal mudflats
Sediments on intertidal flats are exposed during low tides. Under the effect of exposure, the water content of sediments decreases because of the evaporation process, which alters the erosive behaviour of cohesive sediments, and therefore changes the patterns of erosion/accretion on intertidal …
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The Effects of Benthic Organisms on Intertidal Sediment Erodibility
On intertidal sandflats, the dispersal of juvenile organisms can rely on bedload transport, a critical process during small-scale disturbance recovery. The erosion of surface sediments is also vital to benthic-pelagic coupling, where resuspended microbes and organic material become available to …
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Wave-induced sediment transport on an estuarine intertidal flat
… for sediment entrainment on estuarine intertidal flats, however a detailed understanding of the temporal and spatial variability of wave processes, and the way in which these control estuarine sediment transport, is lacking. The aim of this thesis is to redress this deficiency. Wave, …
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Habitat variability and ecosystem processes in intertidal soft-sediments
… of habitat variability on ecosystem processes in intertidal soft-sediments, using a variety of direct measures and models. I built upon a connectivity framework developed for populations to inform our understanding of how specific habitats can contribute to ecosystem function in terms of …
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Hydrodynamics and morphodynamics of shallow tidal channels and intertidal flats
… observations of both tidal channels and intertidal flats are consistent with a unifonn distribution of τ at equilibrium. Investigation of morphodynamic mechanisms leads to scalings of momentum and continuity which diverge from classical models. Scalings for prismatic channels with strong …
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Contribution to our knowledge of the South African intertidal zone
The two papers presented herewith as a thesis for the degree of PhD are two items from a series which is being issued from the Zoological Department of the University of Cape Town. In a sense each paper is complete in itself; but as the papers are also parts of a larger whole, it is necessary to …
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The biogeography and biodiversity of the Namibian intertidal seaweed flora
There have been very few intertidal studies carried out on the Namibian coast. With respect to seaweeds in particular there have been a number of species lists and shore descriptions, but very little research into the biogeography, diversity or ecology. One of the reasons for the lack of research …
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Avian determinants of rocky intertidal community structure in South Africa
… by the seabirds washed off the islands into intertidal and nearshore waters,where it provides a source of inorganic and organic nutrients. The concentrations of nutrients in intertidal rockpools at island and mainland sites in the Saldanha Bay area were measured,and the biological structures …
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Hydrodynamics and morphodynamics of shallow tidal channels and intertidal flats
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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Mate choice and its evolutionary consequences in intertidal snails (Littorina spp.)
The ability to recognise potential mates and choose the best possible partner for reproduction is of fundamental importance for most animal species. This thesis presents studies of mate choice in marine snails of the genus Littorina, where male precopulatory mate choice seems to be more predominant …
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Interactive processes in a Lanice conchilega (Annelida: Polychaeta) dominated intertidal community
… into the factors influencing a soft-sediment intertidal benthic community dominated by the large tube building polychaete Lanice conchilega (Pallas, 1766). The environmental and biological characteristics of a mid-shore sampling site on a relatively sheltered sandflat were monitored over a two …
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Aspects of ecology and algal physiology in Hawaii's rocky intertidal zones
Intertidal zones are vulnerable to anthropogenic impacts that result from human populations concentrated near coastal waters and while the impact on temperate rocky intertidal systems is much studied, comparatively less is known about these habitats in the tropics. To bolster knowledge and …
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Reproduction, settlement, and phenology of intertidal barnacles: implications for larval dispersal
… between reproduction and settlement timing of intertidal barnacles, and I explore the extent to which the timing of these events is explained by environmental and astronomical cycles and by water column conditions. In Chapter 2, I assess the cycles driving Chthamalus fissus reproduction and …
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