Oceanography

Download e-book for iPad: Deep-Water Coral Reefs: Unique Biodiversity Hot-Spots by Martin Hovland

By Martin Hovland

Deep-water coral reefs are discovered alongside huge sections of the outer continental cabinets and slopes of Europe, from North Cape to the Gulf of Cadiz, and since additionally they ensue alongside the Atlantic seaboard of united states, the Gulf of Mexico, off Brazil, within the Mediterranean, and stale New Zealand, they're presently being precise via foreign teams of marine scientists. they've got turn into well known and opportune deep-water examine pursuits simply because they provide fascinating frontier exploration, mixed with a complete plethora of contemporary clinical equipment, akin to deep-sea drilling, sampling, handheld remote control surveying and documentation. moreover they characterize well timed possibilities for additional advancements in the program of geochemistry, solid isotope learn, bacterial sciences, together with DNA-sequestering, and clinical examine (search for bioactive compounds). The built-in Ocean Drilling software (IODP) has prepared a deep-sea clinical drilling crusade on titanic carbonate banks off eire. as the reefs at present defy conventional marine-ecological theories, they symbolize destiny examine possibilities and should get pleasure from medical scrutiny for a few years to return.

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Extra resources for Deep-Water Coral Reefs: Unique Biodiversity Hot-Spots (Springer Praxis Books Life Sciences)

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On muddy seabeds they may extend rootlike structures several centimetres into the sediment (Roberts and Carney, 1997). ) are also known. These microbes oxidise sulphide using a variety of oxidants, usually oxygen or nitrate stored in vacuoles inside the microorganism (storing helps eliminate the problems of molecular diffusion in these huge bacteria). The process is summarised by the following equations: þ HS À þ 2O2 ! SO 2À 4 þH or þ O2 þ 4H2 S þ CO2 ! SO 2À 4 þH Sec. 18. Bacterial mats disturbed by an ROV manipulator, Gullfaks (Hovland, 2007).

11. A perspective view of a 6 km long and 1 km wide section of the Nyegga seafloor area (see previous figure for location). , 2005). The complex pockmarks are located well within the gas hydrate pressure/ temperature stability field, and are associated with a regional BSR (bottom simulating reflector). 12). They also have a distinct fauna with local bacterial mats, tubeworms (including small pogonophorans), stalked crinoids, and pycnogonids (sea spiders). , 2005; Judd and Hovland, 2007). , without ebullition or other visual fluid flow).

17. Close-up of bacterial mat at Gullfaks. Arrow points at where methane bubbles continuously emit from below (Hovland, 2007). enclosed anoxic basins (Judd and Hovland, 2007). 18). Generally, the mats are less than 1 cm thick, but some may be as thick as 10 cm. On muddy seabeds they may extend rootlike structures several centimetres into the sediment (Roberts and Carney, 1997). ) are also known. These microbes oxidise sulphide using a variety of oxidants, usually oxygen or nitrate stored in vacuoles inside the microorganism (storing helps eliminate the problems of molecular diffusion in these huge bacteria).

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