Effects of CO2 on benthic biota: An in situ benthic chamber experiment in Storfjorden (Norway) |
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| Authors: | Hiroshi Ishida Lars G Golmen Julia West Martin Krüger Patricia Coombs John Arthur Berge Tastuo Fukuhara Michimasa Magi Jun Kita |
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| Institution: | 1. General Environmental Technos Co., Ltd., Tokyo 101-0042, Japan;2. Norwegian Institute for Water Research, Oslo N-0349, Norway;3. British Geological Survey, Nottingham NG12 5GG, UK;4. Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover 30001-30669, Germany;5. Research Institute of the Innovative Technologies of the Earth, Kyoto 619-0292, Japan;6. Runde Environmental Centre, N-6096 Runde, Norway |
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| Abstract: | Carbon capture and storage (CCS) methods, either sub-seabed or in ocean depths, introduces risk of CO2 leakage and subsequent interaction with the ecosystem. It is therefore important to obtain information on possible effects of CO2. In situ CO2 exposure experiments were carried out twice for 10 days during 2005 using a Benthic Chamber system at 400 m depth in Storfjorden, Norway. pCO2 in the water above the sediment in the chambers was controlled at approximately 500, 5000 and 20,000 μatm, respectively. This article describes the experiment and the results from measured the biological responses within the chamber sediments. The results show effects of elevated CO2 concentrations on biological processes such as increased nanobenthos density. Methane production and sulphate reduction was enhanced in the approximately 5000 μatm chamber. |
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| Keywords: | Climatic change CO2 storage CO2 leakage Field experiments CCS |
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