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 65 for “"Hydrothermal vents"”.
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Diffuse flow from hydrothermal vents
… from a collection of diffuse hydrothennal vents was modelled to determine the fate of this source of flow under typical environmental conditions at seafloor spreading centers. A laboratory simulation was conducted to test an analytic model of diffuse plume rise. The results showed that …
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Reproductive ecology of Vestimentifera (Polychaeta: Siboglinidae) from hydrothermal vents and cold seeps
… deep-sea chemosynthetic communities, including hydrothermal vents and cold seeps. Species of siboglinids are community dominants, primary colonists of new vent sites, and the longest living and fastest growing marine invertebrates. Their mechanisms of propagation, dispersal and genetic exchange …
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Analysis of the sulfur system in waters from the Galapagos Ridge hydrothermal vents
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1979.
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Reproductive traits of pioneer gastropod species colonizing deep-sea hydrothermal vents after an eruption
… in understanding the early succession of nascent hydrothermal vents. The reproductive ecology of pioneer species at deep-sea hydrothermal vents may provide insight into their dispersal, population connectivity, and ability to colonize after disturbance. An opportunity to study the reproductive …
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Reproductive traits of pioneer gastropod species colonizing deep-see hydrothermal vents after an eruption
… in understanding the early succession of nascent hydrothermal vents. The reproductive ecology of pioneer species at deep-sea hydrothermal vents may provide insight into their dispersal, population connectivity, and ability to colonize after disturbance. An opportunity to study the reproductive …
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An investigation into the characteristics and sources of light emission at deep-sea hydrothermal vents
… to image ambient light from high-temperature vents at 9°N East Pacific Rise and the Juan de Fuca Ridge during 1997 and 1998 Alvin dive cruises. ALISS is a low-light digital camera with custom-designed optics. A set of nine lenses, each covered by an individual bandpass filter (50 and 100 nm …
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Influence of hydrodynamics on the larval supply to hydrothermal vents on the East Pacific Rise
… morphological and genetic identifications for hydrothermal vent gastropod larvae along the northern East Pacific Rise. Daily and weekly variability in the supply of hydrothermal vent gastropod larvae to two hydrothermal vents, 1.6 km apart on the East Pacific Rise, were quantified concurrently …
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Influence of hydrodynamics on the larval supply to hydrothermal vents on the East Pacific Rise
… morphological and genetic identifications for hydrothermal vent gastropod larvae along the northern East Pacific Rise. Daily and weekly variability in the supply of hydrothermal vent gastropod larvae to two hydrothermal vents, 1.6 km apart on the East Pacific Rise, were quantified concurrently …
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An investigation into the characteristics and sources of light emission at deep-sea hydrothermal vents
… to image ambient light from high-temperature vents at 9°N East Pacific Rise and the Juan de Fuca Ridge during 1997 and 1998 Alvin dive cruises. ALISS is a low-light digital camera with custom-designed optics. A set of nine lenses, each covered by an individual bandpass filter (50 and 100 nm …
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Diversity of meiofauna at deep-sea hydrothermal vents and cold seeps with particular reference to nematodes
Deep-sea hydrothermal vents and cold seeps are remarkable for their spectacular megaand<br/>macrofauna, many of which appear to have a high level of endemism to these chemosynthetic<br/>environments. It is not clear whether the patterns of biodiversity, faunal zonation<br/>and biogeography …
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Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galápagos Rift
Ecological processes at deep-sea hydrothermal vents on fast-spreading mid-ocean ridges are punctuated by frequent physical disturbance. Larval dispersal among disjunct vent sites facilitates the persistence of sessile invertebrate species in these geologically and chemically dynamic habitats …
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Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galápagos Rift
Ecological processes at deep-sea hydrothermal vents on fast-spreading mid-ocean ridges are punctuated by frequent physical disturbance. Larval dispersal among disjunct vent sites facilitates the persistence of sessile invertebrate species in these geologically and chemically dynamic habitats …
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TIMELESS QUESTIONS AND MODERN CHALLENGES: A JOURNEY FROM THE ORIGIN OF LIFE IN HYDROTHERMAL VENTS TO ELECTROCHEMICAL CO2 REDUCTION
… to investigate the functioning of the alkaline hydrothermal vent from an electrochemical point of view in order to inspire new technologies for CO2 reduction. Oceanic hydrothermal vents (HTVs) are geological structures that played a key role 4 billion years ago in the formation of the very first …
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Assessment of flagellate diversity at deep-sea hydrothermal vents using the combined approach of culture-dependent and culture-independent methods
… were isolated and cultured from four deep-sea hydrothermal vents in the Eastern Pacific Ocean: Juan de Fuca Ridge, Guaymas Basin, and both 21°N and 9°N on the East Pacific Rise (EPR). The hydrothermal vent flagellates belonged to six different taxonomic orders: the Ancyromonadida, Bicosoecida, …
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Searching for life where the sun don't shine : explorations to the seafloors of Earth and Europa
Hydrothermal vents on Earth's seafloor host entire ecosystems that live off energy from chemosynthesis rather than photosynthesis. This energy process uses chemical reactions between metals and hot gases from inside Earth's mantle to fuel thriving communities of exotic organisms. Some researchers …
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The chemistry of iron in hydrothermal plumes
This thesis investigates the role of submarine hydrothermal vents in the global marine Fe<br/>budget. While debate continues over the sources of dissolved Fe to the global deep-ocean<br/>dissolved Fe budget, it had been presumed, until recently, that all the Fe emitted from<br/>hydrothermal vents …
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The geology of the Khayyam and Stumble-On deposits, Prince of Wales Island, Alaska
… syngenetic sulfide precipitation from submarine hydrothermal vents. Coarse fragmental textures in the host metavolcanic rocks indicate the proximity of an active volcanic center contemporaneous with ore formation. Strong chloritic alteration in the footwall rocks adjacent to the orebodies is …
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Verification of numerical models for hydrothermal plume water through field measurements at TAG
Hydrothermal vents discharge superheated, mineral rich water into our oceans, thereby providing a habitat for exotic chemosynthetic biological communities. Hydrothermal fluids are convected upwards until they cool and reach density equilibrium, at which point they advect laterally with the current. …
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