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The ecosystem of the Mid-Atlantic Ridge at the sub-polar front and Charlie-Gibbs Fracture Zone; ECO-MAR project strategy and description of the sampling programme 2007-2010

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Date
15/12/2013
Author
Priede, I.G.
Billett, D.S.M.
Brierley, A.S.
Hoelzel, A.R.
Inall, M.
Miller, P.I.
Cousins, N.J.
Shields, M.A.
Fujii, T.
Funder
NERC
Grant ID
NE/C51300X/1
Keywords
Mid-ocean ridge
Marine protected area
North Atlantic
Benthic
Pelagic
Trawling
Bathymetry
Remotely operated vehicle
Charlie – Gibbs
GC Oceanography
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Abstract
The ECOMAR project investigated photosynthetically-supported life on the North Mid-Atlantic Ridge (MAR) between the Azores and Iceland focussing on the Charlie-Gibbs Fracture Zone area in the vicinity of the sub-polar front where the North Atlantic Current crosses the MAR. Repeat visits were made to four stations at 2500. m depth on the flanks of the MAR in the years 2007-2010; a pair of northern stations at 54°N in cold water north of the sub-polar front and southern stations at 49°N in warmer water influenced by eddies from the North Atlantic Current. At each station an instrumented mooring was deployed with current meters and sediment traps (100 and 1000. m above the sea floor) to sample downward flux of particulate matter. The patterns of water flow, fronts, primary production and export flux in the region were studied by a combination of remote sensing and in situ measurements. Sonar, tow nets and profilers sampled pelagic fauna over the MAR. Swath bathymetry surveys across the ridge revealed sediment-covered flat terraces parallel to the axis of the MAR with intervening steep rocky slopes. Otter trawls, megacores, baited traps and a suite of tools carried by the R.O.V. Isis including push cores, grabs and a suction device collected benthic fauna. Video and photo surveys were also conducted using the SHRIMP towed vehicle and the R.O.V. Isis. Additional surveying and sampling by landers and R.O.V. focussed on the summit of a seamount (48°44'N, 28°10'W) on the western crest of the MAR between the two southern stations.
Citation
Priede , I G , Billett , D S M , Brierley , A S , Hoelzel , A R , Inall , M , Miller , P I , Cousins , N J , Shields , M A & Fujii , T 2013 , ' The ecosystem of the Mid-Atlantic Ridge at the sub-polar front and Charlie-Gibbs Fracture Zone; ECO-MAR project strategy and description of the sampling programme 2007-2010 ' , Deep Sea Research Part II: Topical Studies in Oceanography , vol. 98 , pp. 220-230 . https://doi.org/10.1016/j.dsr2.2013.06.012
Publication
Deep Sea Research Part II: Topical Studies in Oceanography
Status
Peer reviewed
DOI
https://doi.org/10.1016/j.dsr2.2013.06.012
ISSN
0967-0645
Type
Journal article
Rights
© 2013 The Authors. Published by Elsevier Ltd. All rights reserved. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Description
The work was supported by the UK Natural Environment Research Council (Consortium Grant no. NE/C512961/1) and the Census of Marine Life.
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URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-84888205107&partnerID=8YFLogxK
URI
http://hdl.handle.net/10023/4785

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