Bacterial community responses during a possible CO2leaking from sub-seabed storage in marine polluted sediments.
Carbon capture and storage (CCS) is a viable option to reduce high concentrations of CO2and mitigate their negative effects. This option has associated risks such as possible CO2leakage from the storage sites. So far, negative effects deriving from a CO2release have been reported for benthic macrofauna in both polluted and nonpolluted sediments. However, bacterial communities has no considered. In this work, risk assessment was carried out in order to evaluate the possible effects in a contaminated area considering bacterial responses (total number of cells, respiring activity, changes in the bacterial community composition and diversity). Four microcosms were placed into an integrated CO2injection system with a non-pressurized chamber to simulate four different pH treatments (pH control 7.8, 7, 6.5 and 6). Results showed an impact on bacterial communities because of the CO2treatment. Changes in respiring activity, community composition groups and diversity were found. This study highlights the use of respiring bacteria activity not only as bioindicator for environmental risk assessment and monitoring purposes but also as a bioindicador during a CO2leakage event or CO2enrichment process among all the responses studied.
UNESCO/UNITWIN Wicop, Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Polígono Río San Pedro s/n, Puerto Real, 11510 Cádiz, Spain. Electronic address: ana.borrero@uca.es.
Ana R
AR
Borrero-Santiago
UNESCO/UNITWIN Wicop, Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Polígono Río San Pedro s/n, Puerto Real, 11510 Cádiz, Spain.
T Ángel
TÁ
DelValls
UNESCO/UNITWIN Wicop, Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Polígono Río San Pedro s/n, Puerto Real, 11510 Cádiz, Spain.
M
M
Inmaculada Riba
D001419:Bacteria / Q000378:metabolism*; D002244:Carbon; D002245:Carbon Dioxide / Q000378:metabolism*; D057965:Carbon Sequestration; D000074062:Environmental Biomarkers; D019015:Geologic Sediments / Q000737:chemistry*; D012623:Seawater; D014871:Water Microbiology; D014874:Water Pollutants, Chemical / Q000378:metabolism*
D000074062:Environmental Biomarkers; D014874:Water Pollutants, Chemical; D002245:Carbon Dioxide; D002244:Carbon
Bacterial communities; Carbon capture and storage; Contaminants; Respiring activity