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MEPS 525:97-104 (2015)  -  DOI:

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

Lorenzo Rovelli1,*, Karl M. Attard2,3, Lee D. Bryant4,8, Sascha Flögel4, Henrik Stahl1,9, J. Murray Roberts1,5,6, Peter Linke4, Ronnie N. Glud1,2,3,7

1Scottish Association for Marine Sciences, Scottish Marine Institute, Oban PA37 1QA, UK
2Nordic Centre for Earth Evolution (NordCEE), University of Southern Denmark, 5230 Odense M, Denmark
3Greenland Climate Research Centre, Greenland Institute of Natural Resources, 3900 Nuuk, Greenland
4GEOMAR, Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Germany
5Centre for Marine Biodiversity and Biotechnology, School of Life Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
6Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC 28409, USA
7Arctic Research Centre, University of Århus, 8000 Århus C, Denmark
8Present address: Department of Architecture and Civil Engineering, University of Bath, Bath BA2 7AY, UK
9Present address: Zayed University, Dubai Academic City, Dubai, United Arab Emirates
*Corresponding author:

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.

KEY WORDS: Eddy correlation · Cold-water coral · Community oxygen exchange · Mingulay Reef Complex · Stjernsund

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Cite this article as: Rovelli L, Attard KM, Bryant LD, Flögel S and others (2015) Benthic O2 uptake of two cold-water coral communities estimated with the non-invasive eddy correlation technique. Mar Ecol Prog Ser 525:97-104.

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