Benthic O2 uptake of two cold-water coral communities estimated with the non-invasive eddy-correlation technique

Rovelli, Lorenzo, Attard, Karl M., Bryant, Lee D., Flögel, Sascha, Stahl, Henrik J., Roberts, Murray, Linke, Peter and Glud, Ronnie N. (2015) Benthic O2 uptake of two cold-water coral communities estimated with the non-invasive eddy-correlation technique Marine Ecology Progress Series, 525 . pp. 97-104. DOI 10.3354/meps11211.

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Abstract

The community respiration of 2 tidally dominated cold-water coral (CWC) sites was
estimated using the non-invasive eddy correlation (EC) technique. The first site, Mingulay Reef
Complex, was a rock ridge located in the Sea of Hebrides off Scotland at a depth of 128 m and the
second site, Stjernsund, was a channel-like sound in Northern Norway at a depth of 220 m. Both
sites were characterized by the presence of live mounds of the reef framework-forming scleractinian
Lophelia pertusa and reef-associated fauna such as sponges, crustaceans and other corals. The
measured O2 uptake at the 2 sites varied between 5 and 46 mmol m–2 d–1, mainly depending on
the ambient flow characteristics. The average uptake rate estimated from the ~24 h long deployments
amounted to 27.8 ± 2.3 mmol m–2 d–1 at Mingulay and 24.8 ± 2.6 mmol m–2 d–1 at Stjernsund
(mean ± SE). These rates are 4 to 5 times higher than the global mean for soft sediment communities
at comparable depths. The measurements document the importance of CWC communities for
local and regional carbon cycling and demonstrate that the EC technique is a valuable tool for
assessing rates of benthic O2 uptake in such complex and dynamic settings.

Document Type: Article
Additional Information: WOS:000354393700008
Keywords: eddy correlation, cold-water coral, community oxygen exchange, Mingulay Reef Complex, Stjernsund, ROV PHOCA, RV POSEIDON; POS434; POS438
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R07
OceanRep > The Future Ocean - Cluster of Excellence > FO-R05
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
DOI etc.: 10.3354/meps11211
ISSN: 0171-8630
Projects: Future Ocean
Expeditions/Models:
Date Deposited: 28 Aug 2014 09:21
Last Modified: 13 Apr 2017 07:29
URI: http://eprints.uni-kiel.de/id/eprint/25503

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