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 153 for “"Subtidal"”.
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Subtidal concrete piling fauna in Monterey Harbor, California
Piling organisms were scraped off one side of a concrete piling from the bottom to the low intertidal zone beneath Municipal Wharf No. 2 in Monterey Harbor, California. Sampling was performed at 0.5 m(2) surface area increments. Wet biomass measurements were taken, the organisms were identified and …
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Subtidal cross-shelf circulation on the Northern California shelf
… Circulation Study (NCCCS) are used to study subtidal cross-shelf circulation over the northern California shelf. The northern California shelf, like much of the United States Pacific coast, is subject to strong wind forcing which exhibits characteristic seasonality. In winter and early …
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Subtidal cross-shelf circulation on the Northern California shelf
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1995.
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Biologically induced alternative states in two rocky subtidal benthic communities
… the contrasting communities that occur in the subtidal zones of two closely situated islands in Saldanha Bay on the west coast of South Africa: Both are guano islands, supporting substantial populations of seabirds. They have a similar bottom topography and experience similar physical …
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Influences of the abalone Haliotis midae on subtidal benthic communities
The South African abalone Haliotis midae is a commercially exploited species that is seriously threatened by overfishing and poaching. This not only affects the species itself but also the integrity and functionng of the ecosystem through associated changes in community structure. I assessed the …
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THE FUNCTIONAL ROLE OF ASTERIAS VULGARIS VERRILL (1866) IN THREE SUBTIDAL COMMUNITIES
… Asterias vulgaris has been investigated in three subtidal communities at the Isles of Shoals, New Hampshire, U.S.A., from 1975 to 1980. The three communities are located at depths of 8 m, 18 m, and 30 m along a transect from the intertidal to a depth of 35 meters on rocky substrate of an exposed …
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Ecological Effects of Overwater Structures on Subtidal Kelp, Northern Puget Sound, Washington
… of anthropogenic created shade to the seafloor. Subtidal kelp, over 20 species in total, are abundant in the Sound but little data exists on how they are impacted by these overwater structures. The purpose of this research is to quantify various overwater structures’ impacts on the productivity …
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Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa
… and documented in South Africa, especially the subtidal algal communities along the south coast. This study aims to investigate these communities where few other studies have been conducted. Sampling of shallow subtidal seaweed communities was undertaken at eleven sites along the south coast of …
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The intertidal and shallow subtidal food web of sub-antarctic Marion Island
… in our knowledge of the intertidal and shallow subtidal communities of Marion Island.
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Quantifying biotic interactions with inshore subtidal structures: comparisons between artificial and natural reefs
… to evaluate methods used in the assessment of subtidal epibiotic assemblage structure followed by a detailed study to compare epibiotic recruitment to artificial and natural reefs using PVC plastic recruitment panels. Predator exclusion cages were used to assess the effects of predation on …
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Tidal and Subtidal Lateral Structures of Density and Velocity in the Chesapeake Bay Entrance
… in the transverse structure of the tidal and subtidal density and velocity fields. Amplitude and phase of the semidiurnal and diurnal harmonics reflected the influence of bathymetry, buoyancy conditions and fortnightly variability. Tidal amplitudes were almost twice as large in springs than in …
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Distributional relationships among subtidal algae, sea urchins and reef fish in northeastern New Zealand
… or mode, of habitat transitions on temperate subtidal reefs. This study emphasises the value of repeated descriptions of patterns of abundance, and highlights problems of extrapolation and generalisation in marine ecology. Insufficient information exists at present to comment adequately on the …
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Biogeography and potential factors regulating shallow subtidal reef communities in the western Indian Ocean
The biogeography and ecology of benthic shallow subtidal reef communities in the western Indian Ocean is poorly known, particularly in north-eastern South Africa and southern Mozambique. This thesis uses quantitative information to resolve biogeographic patterns, define reef community types, …
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An investigation into the ecology and biogeography of subtidal seaweed communities of KwaZulu-Natal
… into the ecology and biogeography of subtidal seaweed communities of KwaZulu-Natal. This study is the first to investigate the ecology and biogeography of subtidal seaweed communities along the coast of the province of KwaZulu-Natal, on the east coast of South Africa. Intertidal …
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Aspects of pollution in False Bay, South Africa (with special reference to subtidal pollution)
… the impact of some individual discharges on the subtidal macrofauna. The similar biotic characteristics of three subtidal study sites in the region of the Steenbras Water Treatment Plant discharge indicate that the general turbidity and lower salinity characteristics of eastern False Bay are more …
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An ADCP study of subtidal scale density-driven exchange in Saldanha Bay, South Africa
… conducted to determine the circulation aspect of subtidal-scale, density-driven exchange in Saldanha Bay, South Africa. Density-driven exchange conditions develop in response to synoptic-scale wind events in the southern Benguela region, even under light (<5m s-') wind conditions. During a …
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Biodiversity survey towards conservation of subtidal reef habitats in KwaZulu Natal : biogeography and depth patterns
Subtidal reef communities in KwaZulu-Natal (KZN), South Africa are poorly known. This lack of knowledge is problematic as the biodiversity of these reefs may be severely impacted and inadequately conserved. This study documents and describes subtidal benthic communities occurring on reefs at four …
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Biological structure of an Agulhas Bank subtidal reef community and consumption estimation for a dominant species
… to the flow of organic matter through a subtidal reef environment. In particular, the contribution of Porifera to the organic matter pool in terms of biomass and the consumption of organic matter by a dominant Porifera species are assessed. Further, reef fauna biomass and community …
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ECOLOGY OF ROCKY SUBTIDAL COMMUNITIES: THE ROLE OF MODIOLUS MODIOLUS (L) AND THE INFLUENCE OF DISTURBANCE, COMPETITION, AND MUTUALISM
… processes regulating the structure of rocky subtidal communities off coastal New Hampshire and southern Maine, USA, with emphasis on the ecology of the horse mussel Modiolus modiolus (L.). Quantitative sampling and multivariate analysis revealed 3 communities: (1) Modiolus community; (2) 30 m …
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An analysis of subtidal seaweed communities on a depth gradient at Sodwana Bay, on the KwaZulu-Natal coast, South Africa
The subtidal seaweed communities of the KwaZulu-Natal coast are poorly understood. A recent collaborative research project between Belgian and South African phycologists, however, is currently investigating the diversity and biogeographical affinities of the marine benthic algal flora of this …
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