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 266 for “"deep sea"”.
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Deep-Sea Environment
<p>The deep-sea environment is divided into three zones: the abyssopelagic, the abyssobenthic, and the hadal zones. The ocean floor is not a smooth featureless sedimentary plain as has been believed earlier, but instead it is of rough topography with numerous irregularities, deep depressions, many …
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Deep sea seismic stratigraphy
… for the reflection of seismic waves within deep-sea sediments are shown to be less reliable for the purposes of correlation than their counter-parts in shallow margin sequences. Similar surfaces, such as abrupt lithological changes and unconformities, in the two different realms are not …
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Lipid profiles of deep-sea organisms
… Lipid profiles of these organisms from extreme deep-sea environments are compared. Lipid profiles of adult Mid-Atlantic Ridge hydrothermal vent shrimp, Rimicaris exoculata. support a benthic existence and primarily chemoautotrophic bacterial nutrition. Postlarval alvinocarid shrimp lipid …
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Diversity of New Zealand Deep-sea Amphipoda
… faunal distributions are poorly understood in deep-sea habitats. This thesis assesses diversity of deep-sea amphipod crustaceans at three taxonomic levels (family, species, genetic) on continental margins of New Zealand relative to environmental variables. Sampling was undertaken at 20 stations …
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Post-larval development in deep-sea echinoderms
… metamorphic ontogenesis of thirty species of deep-sea echinoderms, belonging to three classes (Ophiuroidea, Asteroidea and Echinoidea), is described using scanning electron microscopy. The life history of Ophiocten gracilis is also examined as a case study for future research on post-larval …
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Deep-sea corals : a new oceanic archive
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1998.
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Chemosynthetic communities in the deep sea : ecological studies
Deep-sea benthic communities dependent on chemosynthetic primary production are associated with areas of active venting of chemically-modified seawater. Patterns in the distribution of species that occur at hydrothermal vents can be used to predict locations of the vent sites. Patterns in the …
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Evolutionary and ecological genomics in deep-sea organisms
… are conspicuous biological hotspots in the deep-sea. These ecosystems face increasing threats from human activities. Having thorough taxonomic inventories as well as understanding species’ relatedness, diversity, connectivity patterns, and adaptive potential is fundamental for the …
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Towards Deep-Sea Toxicology: Experimental Approaches With Echinoderms
As anthropogenic activities expand into the deep sea, it is only recently that the importance of<br/>deep-sea ecosystems and processes to global biogeochemical systems has become clear. If the<br/>potential impact of human activity upon deep-sea organisms and ecosystems is to be understood<br/>and …
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Evolutionary and ecological genomics in deep-sea organisms
… are conspicuous biological hot spots in the deep-sea. These ecosystems face increasing threats from human activities. Having thorough taxonomic inventories as well as understanding species' relatedness, genetic diversity, connectivity patterns, and adaptive potential is fundamental for the …
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How Historic Shipwrecks Influence Dispersal of Deep-Sea Microbiomes
… shipwrecks potentially shape dispersal of deep-sea microbiomes. Processes impacting dispersal of microbiomes around artificial structures in the ocean and how they connect to other deep-sea habitats is unknown. Dispersal processes are explained for some macroorganisms by theories in …
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A deep sea lab on a chip chemical sensor
… and the Nanoscale System Integration Research Group at Southampton University it has been proposed that integrated L.O.C. devices could be used autonomously and remotely in the marine environment. These innovative micro-devices could provide in situ real time synoptic data on processes …
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Deep-sea sedimentation on the northwest African continental margin.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1972.
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Geochemical tracers in the deep-sea and the North Sea
… about the inorganic geochemistry of the deep-sea and the North Sea, which have been published or submitted for publication. Typical element/Al ratios indicate eolian, continental input of loess material during the last Heinrich-events. In the Arabian Sea, the climatic influence on the …
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Using ecosystem services mapping in deep-sea Marine Spatial Planning
… assessing ES in terrestrial and coastal systems. Deep-sea applications are particularly scant. Assessing ES provided by the deep sea is undermined by the lack of ecological data and scientific understanding of the links between ecosystem components and human well-being. Thus, novel tools are …
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Optimal capital structure of deep sea foreign freight transportation companies
This thesis aims to understand the optimal leverage range for shipping companies (maritime foreign freight transportation companies - SIC 4412), through data analysis. This study confirms that in a traditional industry like shipping, the Market value-leverage curve is very similar to the …
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An experimental study of compressional velocities in deep sea sediments
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1960.
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Studies of deep-sea sedimentary microtopography in the North Atlantic Ocean
… than 2000 m) have been formed as bed forms of deep currents. These bed forms, all developed in cohesive sediments, include current ripples (spacings of tens of centimeters, formed transverse to the flow), longitudinal triangular ripples (spacings of meters, formed in sandy muds and parallel to …
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