By Martin Hovland
Due to extensive ocean backside surveys, ordinarily for the aim of constructing oil and fuel assets, scientists understand that deep-water corals shape wide reefs and sizeable carbonate mounds within the chilly waters of the entire significant oceans.This ebook, written by way of Hovland (Statoil, Norway), a marine geology specialist, is of substantial curiosity because of its many coloured pictures and drawings that illustrate the destinations and natural range of the reefs and lumps. these within the different world-wide oceans seem to be related. The textual content is easily written and the writer attracts realization to the necessity for conservation, essentially to guard the reefs from harm by means of deep-water trawling. important as supplemental studying for sessions on marine biology.Summing Up: hugely urged. educational collections, upper-level undergraduates, graduate scholars, researchers, and school.
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Extra resources for Deep-Water Coral Reefs: Unique Biodiversity Hot-Spots
C. Brøgger (1901) are also interesting: ‘‘By own observations, I can fully conﬁrm the accuracy of Lophelia prolifera descriptions made by Sars. They are common around Drøbak over the whole seaﬂoor, over an area of about 100 km 2 , from a depth of 70–80 fathoms [ca. 150 metres] to sea level. They are found above sea level on Barholmen, Kaholmen [islands], to an elevation of over 30 m. Likewise, they are found further out in the fjord, at Bævø (near Jelø’s north point), still near Svelvik, and in large occurrences adjacent to Dramselven [a river] at Ryg, near Mjøndalen [0–10 m above sea level].
Perhaps the best analogues to the Norwegian Lophelia reefs are the spectacular Devonian (380-million-year-old) Saharan fossil reefs. , support for the hydraulic formation model). The best analogy for the modern giant carbonate mounds oﬀ Ireland and Mauritania are perhaps the Kess-Kess Mounds in Morocco. These have also been suggested as seep-related. ’’ My own conclusion is that we really do not know how and why ancient structures or modern ones formed. Thus, there is a lot of future research to be carried out on the modern occurrences.
These results suggest that corals may be able to alter their biochemistry in response to changes in seawater chemistry. 3. The Lophelia worm (Eunice norvegica), from the aquarium in Bergen, at IMR (by and courtesy of Pa˚l B. Mortensen). 4 cm wide. The inset is a microscopic view of its jaw apparatus (by and courtesy of Andre´ Freiwald). The Lophelia worm is observed to feed on food spills from coral polyps. According to Mortensen et al. (2002), the worm also aids the Lophelia colony by strengthening the physical structure of the skeleton by enhancing the coral’s calciﬁcation around its dwelling tubes (photo courtesy of P.