Abstract
The dynamics that occur at the Porcupine Bank, Rockall Trough, are described in relation to the role the bank, and others like it, may play in the development of deep-water corals, such as Lophelia pertusa (L.), which occurs widely in the NE Atlantic. High productivity has been measured over the bank, and it appears that this productivity may be fuelled by an increase in nutrients available over the bank through winter convection which leaves dense, nutrient rich water on the bank. This dense water drains away slowly through the benthic boundary layer (BBL) providing a mechanism for downslope transport of organic material in the boundary layer. Processes such as rectification of diurnal tides and Taylor column formation generate closed circulation patterns around the bank and promote the retention of organic matter over the bank. Similar processes have been observed over other Rockall Trough banks, and the combination of these processes appear to promote the availability of food to the corals that inhabit the lower flanks of the banks, particularly on the coral-dominated carbonate mounds that also occur there.
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De Stigter H, White M, van Weering TCE, de Haas H (submitted) Hydrodynamics of carbonate mounds on the south Rockall Trough margins, NE Atlantic Ocean. Mar Geol
Dooley HD (1984) Aspects of oceanographic variability on Scottish fishing grounds. PhD thesis, Aberdeen Univ
Frederiksen R, Jensen A, Westerberg H (1992) The distribution of the scleractinian coral Lophelia pertusa around the Faeroe Islands and the relation to internal tidal mixing. Sarsia 77: 157–171
Freiwald A (2002) Reef-forming cold-water corals. In: Wefer G, Billett D, Hebbeln D, Jørgensen BB, Schlüter M, van Weering T (eds) Ocean Margin Systems. Springer, Berlin Heidelberg, pp 365–385
Freiwald A, Fosså JH, Grehan AJ, Koslow JA, Roberts JM (2004) Cold-water coral reefs. UNEP-WCMC Rep, Biodiversity Ser 22, 84 pp
Hill AE, Souza AJ, Jones K, Simpson JH, Shapiro G, McCandliss R, Wilson H, Leftley J (1998) The Malin cascade in winter 1996. J Mar Res 56: 87–106
Goldner DR, Chapman DC (1997) Flow and particle motion induced above a tall seamount by steady and tidal background currents. Deep-Sea Res 44: 719–744
Kenyon NH, Akhmetzhanov AM, Wheeler AJ, van Weering TCE, de Haas H, Ivanov MI (2003) Giant carbonate mounds in the southern Rockall Trough. Mar Geol 195: 5–30
Kunze E, Toole JM (1997) Tidally driven vorticity, diurnal shear, and turbulence atop Fieberling Seamount. J Phys Oceanogr 27: 2663–2693
Mohn C, Beckmann A (2002) Numerical studies on flow amplification at an isolated shelf break bank, with application to Porcupine Bank. Cont Shelf Res 22: 1325–1338
Mohn C, Bartsch J, Meincke J (2002) Observations of the mass and flow field at Porcupine Bank. ICES J Mar Sci 59: 380–392
Roberts JM, Long D, Wilson JB, Mortensen PB, Gage JD (2003) The cold-water coral Lophelia pertusa (Scleractinia) and enigmatic seabed mounds along the north-east Atlantic margin; are they related? Mar Pollut Bull 46: 7–20
Rogers AD (1999) The biology of Lophelia pertusa (Linnaeus 1758). Int Rev Hydrobiol 84: 315–406
Shapiro GI, Hill AE (1997) Dynamics of dense water cascades at the shelf edge. J Phys Oceanogr 27: 2381–2394
Van Aken HM, Becker G (1996) Hydrography and through-flow in the north-eastern North Atlantic; the NANSEN project. Progr Oceanogr 38: 297–346
Van Weering TCE, de Haas H, de Stigter H, Lykke-Anderson H, Kouvaev I (2003) Structure and development of giant carbonate mounds at the SW and SE Rockall Trough margins, NE Atlantic Ocean. Mar Geol 198: 67–81
White M (submitted) The hydrography of the Porcupine Bank and Sea Bight and associated carbonate mounds. Int J Earth Sci
White M, Mohn C, Orren MJ (1998) Nutrient distributions across the Porcupine Bank. ICES J Mar Sci 55: 1082–1094
White M, de Stigter H, de Haas H, van Weering T (submitted) Physical dynamics at the Rockall Trough margin that influence the carbonate mound and cold coral reef ecosystem. Progr Oceanogr
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© 2005 Springer-Verlag Berlin Heidelberg
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White, M., Mohn, C., de Stigter, H., Mottram, G. (2005). Deep-water coral development as a function of hydrodynamics and surface productivity around the submarine banks of the Rockall Trough, NE Atlantic. In: Freiwald, A., Roberts, J.M. (eds) Cold-Water Corals and Ecosystems. Erlangen Earth Conference Series. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-27673-4_25
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DOI: https://doi.org/10.1007/3-540-27673-4_25
Publisher Name: Springer, Berlin, Heidelberg
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