Cold-water corals in the Bay of Biscay - occurrences and distribution in space and time (TransBiscay) - Cruise No. M84/5, May 31 - June 21, 2011, Vigo (Spain) - Brest (France)

Flögel, Sascha, Becheler, R., De Cleyn, A., Da Cunha, M., Dullo, Wolf-Christian, Fietzke, Jan, Frank, Martin, Frank, Y., Garlichs, T., Genio, L., Gori, A., Liebetrau, Volker, Lopez-Correa, M., Matos, L., Movellan, A., Obermüller, G., Orejas, C., Petersen, Asmus, Raecke, A., Rüggeberg, Andres, Schott, Thorsten, Stalder, C. and Zieringer, Moritz (2014) Cold-water corals in the Bay of Biscay - occurrences and distribution in space and time (TransBiscay) - Cruise No. M84/5, May 31 - June 21, 2011, Vigo (Spain) - Brest (France) METEOR-Berichte, 84/5 . DFG-Senatskommission für Ozeanographie, Bremen. DOI 10.2312/cr_m84_5.

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Abstract

The scientific objectives of METEOR cruise M84/5 focused on the measurement
and analysis of the environmental controls of modern and fossil cold-water coral growth
along a transect in the Bay of Biscay. In four working areas we successfully deployed lander
systems and CTD/Ro’s to document the physical and hydrochemical characteristics of bottom
water masses and the water column in general. These are used to shed light on potential
linkages to modern cold-water coral growth and distribution. These investigations were
flanked by plankton tows in surface waters. The base for all investigations was a thorough
hydroacoustic survey to characterize potential cold-water coral bearing areas with living
colonies. Based on these maps we deployed all video-guided gear such as the OFOS-video
sled, the TV grab, and the lander systems. Benthic assemblages and sedimentary structures
have been documented and sampled with the OFOS and a box corer. Simultaneously, genetic
samples of the living coral material were taken for additional studies. Furthermore, we have
taken gravity cores to investigate the paleoceanographic conditions as well as the timing of
cold-water coral colonization in the Bay of Biscay. Along with the coring efforts, a detailed
sampling and study of porewater properties was performed. An additional aim of this cruise
was to investigate the influence of boundary exchange processes on the Neodymium isotopy
in bottom waters along the pathway of the Mediterranean Outflow water (MOW) by taking
multiple samples with the CTD/Ro.
The new data and samples of this METEOR cruise will provide the framework to
investigate the timing of cold-water coral colonization in the Bay of Biscay, as well as its
interplay with the ambient hydrography and geochemistry. This successful cruise has
provided the basis to investigate the scientific aims of this expedition in great detail.

Document Type: Report (Cruise Report)
Keywords: RV METEOR ; M84/5 ; cruise report ; TransBiscay
Research affiliation: OceanRep > GEOMAR > ZE Central Facilities > ZE-TLZ Technical and Logistics
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
DOI etc.: 10.2312/cr_m84_5
ISSN: 2195-8475
Expeditions/Models:
Date Deposited: 03 Dec 2014 14:24
Last Modified: 03 Dec 2014 14:24
URI: http://eprints.uni-kiel.de/id/eprint/26130

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