Download Deep-Water Coral Reefs: Unique Biodiversity Hot-Spots by Martin Hovland PDF

By Martin Hovland

Deep-water coral reefs are came across alongside huge sections of the outer continental cabinets and slopes of Europe, from North Cape to the Gulf of Cadiz, and since in addition 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 specific via overseas teams of marine scientists. they've got turn into well known and opportune deep-water examine objectives simply because they provide intriguing frontier exploration, mixed with a complete plethora of contemporary medical tools, resembling deep-sea drilling, sampling, handheld remote control surveying and documentation. additionally they characterize well timed possibilities for additional advancements in the software of geochemistry, solid isotope learn, bacterial sciences, together with DNA-sequestering, and scientific examine (search for bioactive compounds). The built-in Ocean Drilling software (IODP) has prepared a deep-sea medical drilling crusade on monstrous carbonate banks off eire. as the reefs at the moment defy conventional marine-ecological theories, they characterize destiny examine possibilities and may get pleasure from medical scrutiny for a few years to come back.

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

Example text

Completion of the ‘‘pockmark book’’ (1988) led to further reflexion over the mysterious aspects of deep-water coral reefs. Surely the reason they only occurred in certain areas of the Gulf of Mexico and North Atlantic was that they relied on local nutrient contributions. It could not be only by chance that pockmarks occur close by the Fugløy reef. ’’ (Hovland, 1990b). Later, one of the reviewers of this article came up and said: ‘‘Martin, because this idea is quite wild, I tried to find flaws and to vote against publication, but there were no flaws, neither in data nor reasoning .

This biotope was only found inside the pockmarks, despite extensive visual surveys on the general seafloor of the region. The relatively high population 2 The ‘‘Pedee Belemnite’’ is a marine carbonate rock used as a standard for carbon isotopes. Sec. 12. Gray and white bacterial mats on the sediment seafloor in the deepest, central part of complex pockmark G11 at Nyegga. A sediment core acquired at this very location demonstrates high concentrations of light hydrocarbons (Hovland and Svensen, 2006).

A total of seven such mounds were visually inspected with ROVs. These have four characteristics in common: (1) they have a positive topography (rounded mounds and cones); (2) they are partly covered in bacterial mats (indicating ongoing fluid flow); (3) they are partly covered in a carpet of small, living tubeworms (pogonophorans, which utilize methane); and (4) they have distinct corrosion pits on their surfaces, indicating fluidisation and point source corrosion of the covering sediments (probably caused by localised sub-surface hydrate dissociation).

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