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Li P, Mei J, Xie J. The regulation of carbon dioxide on food microorganisms: A review. Food Res Int 2023; 172:113170. [PMID: 37689923 DOI: 10.1016/j.foodres.2023.113170] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 06/16/2023] [Accepted: 06/17/2023] [Indexed: 09/11/2023]
Abstract
This review presents a survey of two extremely important technologies about CO2 with the effectiveness of controlling microorganisms - atmospheric pressure CO2-based modified atmosphere packaging (MAP) and high pressure CO2 non-thermal pasteurization (HPCD). CO2-based MAP is effectively in delaying the lag and logarithmic phases of microorganisms by replacing the surrounding air, while HPCD achieved sterilization by subjecting food to either subcritical or supercritical CO2 for some time in a continuous, batch or semi-batch way. In addition to the advantages of healthy, eco-friendly, quality-preserving, effective characteristic, some challenges such as the high drip loss and packaging collapse associated with higher concentration of CO2, the fuzzy mechanisms of oxidative stress, the unproven specific metabolic pathways and biomarkers, etc., in CO2-based MAP, and the unavoidable extraction of bioactive compounds, the challenging application in solid foods with higher efficiency, the difficult balance between optimal sterilization and optimal food quality, etc., in HPCD still need more efforts to overcome. The action mechanism of CO2 on microorganisms, researches in recent years, problems and future perspectives are summarized. When dissolved in solution medium or cellular fluids, CO2 can form carbonic acid (H2CO3), and H2CO3 can further dissociate into bicarbonate ions (HCO3-), carbonate (CO32-) and hydrogen cations (H+) ionic species following series equilibria. The action mode of CO2 on microorganisms may be relevant to changes in intracellular pH, alteration of proteins, enzyme structure and function, alteration of cell membrane function and fluidity, and so on. Nevertheless, the effects of CO2 on microbial biofilms, energy metabolism, protein and gene expression also need to be explored more extensively and deeply to further understand the action mechanism of CO2 on microorganisms.
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Affiliation(s)
- Peiyun Li
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China.
| | - Jun Mei
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China.
| | - Jing Xie
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China; Collaborative Innovation Center of Seafood Deep Processing, Ministry of Education, Dalian 116034, China.
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Bonnail E, Borrero-Santiago AR, Nordtug T, Øverjordet IB, Krause DF, Ardelan MV. Climate change mitigation effects: How do potential CO 2 leaks from a sub-seabed storage site in the Norwegian Sea affect Astarte sp. bivalves? CHEMOSPHERE 2021; 264:128552. [PMID: 33065323 DOI: 10.1016/j.chemosphere.2020.128552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 09/29/2020] [Accepted: 10/01/2020] [Indexed: 06/11/2023]
Abstract
Carbon capture and storage (CCS) is one of the most promising mitigation strategies for reducing the emissions of carbon dioxide (CO2) to the atmosphere and may substantially help to decelerate global warming. There is an increasing demand for CCS sites. Nevertheless, there is a lack of knowledge of the environmental risk associated with potential leakage of CO2 from the storage sites; and even more, what happens when the seepage stops. Can the environment return to the initial equilibrium? Potential effects on native macrofauna were studied under a scenario of a 50-day CO2 leakage, and the subsequent leak closure. To accomplish the objective, Trondheim Fjord sediments and clams were exposed to an acidified environment (pH 6.9) at 29 atm for 7 weeks followed by a 14-day recovery at normal seawater conditions (pH 8.0, 29 atm). Growth and survival of clams exposed to pressure (29 atm) and reduced pH (6.9) did not significantly differ from control clams kept at 1 atm in natural seawater. Furthermore, bioaccumulation of elements in the soft tissue of clams did not register significant variations for most of the analysed elements (Cd, Cr, Pb, and Ti), while other elements (As, Cu, Fe, Ni) had decreasing concentrations in tissues under acidified conditions in contrast to Na and Mg, which registered an uptake (Ku) of 111 and 9.92 μg g-1dw d-1, respectively. This Ku may be altered due to the stress induced by acidification; and the element concentration being released from sediments was not highly affected at that pH. Therefore, a 1 unit drop in pH at the seafloor for several weeks does not appear to pose a risk for the clams.
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Affiliation(s)
- Estefanía Bonnail
- Centro de Investigaciones Costeras-Universidad de Atacama (CIC-UDA). University of Atacama, Copiapó, Chile.
| | - Ana R Borrero-Santiago
- Department of Chemistry, Norwegian Science and Technology University (NTNU), Trondheim, Norway
| | - Trond Nordtug
- SINTEF Ocean, Environment and New Resources, Trondheim, Norway
| | | | | | - Murat V Ardelan
- Department of Chemistry, Norwegian Science and Technology University (NTNU), Trondheim, Norway
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Yu T, Chen Y. Effects of elevated carbon dioxide on environmental microbes and its mechanisms: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 655:865-879. [PMID: 30481713 DOI: 10.1016/j.scitotenv.2018.11.301] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/20/2018] [Accepted: 11/20/2018] [Indexed: 05/24/2023]
Abstract
Before the industrial revolution, the atmospheric CO2 concentration was 180-330 ppm; however, fossil-fuel combustion and forest destruction have led to increased atmospheric CO2 concentration. CO2 capture and storage is regarded as a promising strategy to prevent global warming and ocean acidification and to alleviate elevated atmospheric CO2 concentration, but the leakage of CO2 from storage system can lead to rapid acidification of the surrounding circumstance, which might cause negative influence on environmental microbes. The effects of elevated CO2 on microbes have been reported extensively, but the review regarding CO2 affecting different environmental microorganisms has never been done previously. Also, the mechanisms of CO2 affecting environmental microorganisms are usually contributed to the change of pH values, while the direct influences of CO2 on microorganisms were often neglected. This paper aimed to provide a systematic review of elevated CO2 affecting environmental microbes and its mechanisms. Firstly, the influences of elevated CO2 and potential leakage of CO2 from storage sites on community structures and diversity of different surrounding environmental microbes were assessed and compared. Secondly, the adverse impacts of CO2 on microbial growth, cell morphology and membranes, bacterial spores, and microbial metabolism were introduced. Then, based on biochemical principles and knowledge of microbiology and molecular biology, the fundamental mechanisms of the influences of carbon dioxide on environmental microbes were discussed from the aspects of enzyme activity, electron generation and transfer, and key gene and protein expressions. Finally, key questions relevant to the environmental effect of CO2 that need to be answered in the future were addressed.
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Affiliation(s)
- Tong Yu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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Bautista-Chamizo E, Sendra M, De Orte MR, Riba I. Comparative effects of seawater acidification on microalgae: Single and multispecies toxicity tests. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 649:224-232. [PMID: 30173031 DOI: 10.1016/j.scitotenv.2018.08.225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/16/2018] [Accepted: 08/17/2018] [Indexed: 06/08/2023]
Abstract
In order to gain knowledge about the potential effects of acidification in aquatic ecosystems, global change research based on microalgae as sentinel species has been often developed. However, these studies are limited to single species tests and there is still a research gap about the behaviour of microalgal communities under this environmental stressor. Thus, the aim of this study was to assess the negative effects of CO2 under an ecologically realistic scenario. To achieve this objective, two types of toxicity tests were developed; i) single toxicity tests and ii) multispecies toxicity tests, in order to evaluate the effects on each species as well as the interspecific competition. For this purpose, three microalgae species (Tetraselmis chuii, Phaeodactylum tricornutum and Nannochloropsis gaditana) were exposed to two selected pH levels (7.4, 6.0) and a control (pH 8.0). The pH values were choosen for testing different scenarios of CO2 enrichment including the exchange atmosphere-ocean (pH 7.4) and natural or anthropogenic sources of CO2 (pH 6.0). The effects on growth, cell viability, oxidative stress, plus inherent cell properties (size, complexity and autofluorescence) were studied using flow cytometry (FCM). Results showed that T. chuii was the most resistant species to CO2 enrichment with less abrupt changes in terms of cell density, inherent cell properties, oxidative stress and cell viability. Although P. tricornutum was the dominant species in both single and multispecies tests, this species showed the highest decrease in cell density under pH 6.0. Effects of competence were recorded in the multispecies control (pH 8) but this competence was eclipsed by the effects of low pH. The knowledge of biological interactions made by different microalgae species is a useful tool to extrapolate research data from laboratory to the field.
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Affiliation(s)
- E Bautista-Chamizo
- Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Spain.
| | - M Sendra
- Departamento de Ecología y Gestión Costera, Instituto de Ciencias Marinas de Andalucía (CSIC), Spain
| | - M R De Orte
- Departamento de Ciencias do Mar, Instituto do Mar, Universidade Federal de São Paulo, Brazil; Department of Global Ecology, Carnegie Institution, Stanford, USA
| | - I Riba
- Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Spain
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Moreno-Andrés J, Acevedo-Merino A, Nebot E. Study of marine bacteria inactivation by photochemical processes: disinfection kinetics and growth modeling after treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:27693-27703. [PMID: 29307073 DOI: 10.1007/s11356-017-1185-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 12/28/2017] [Indexed: 06/07/2023]
Abstract
The importance of seawater treatment in order to avoid microbiological pollution related to aquaculture or ballast water management has increased during the last few years. Bacterial indicators used for the evaluation of different disinfection treatments are usually related with both waste and drinking water, these standards are not usual microorganisms found in seawater. Thus, it is thought necessary to study the behavior of different marine-specific organisms in regard to improve the disinfection processes in seawater. In this study, three different bacteria have been selected among major groups of bacterial community from marine waters: two water-associated, Roseobacter sp. and Pseudomonas litoralis, and one sediment-associated, Kocuria rhizophila. A kinetic inactivation model together with a post-treatment growth tendency has been obtained after the application of UV-C and UV/H2O2 processes. According to the first kinetic rate constant, different responses were obtained for the different bacterial groups. Once the treatment was applied, modeling of growth curves revealed high recover within the first 3 days after treatment, even when UV/H2O2 was applied. This study introduces a sensitivity index, in which results show different levels of resistance for both treatments, being Roseobacter sp. the most sensitive bacteria, followed by P. litoralis and K. rhizophila.
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Affiliation(s)
- Javier Moreno-Andrés
- Department of Environmental Technologies, INMAR-Marine Research Institute, University of Cádiz, Campus Universitario Puerto Real, 11510, Puerto Real, Cádiz, Spain.
| | - Asunción Acevedo-Merino
- Department of Environmental Technologies, INMAR-Marine Research Institute, University of Cádiz, Campus Universitario Puerto Real, 11510, Puerto Real, Cádiz, Spain
| | - Enrique Nebot
- Department of Environmental Technologies, INMAR-Marine Research Institute, University of Cádiz, Campus Universitario Puerto Real, 11510, Puerto Real, Cádiz, Spain
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Bautista-Chamizo E, Sendra M, Cid Á, Seoane M, Romano de Orte M, Riba I. Will temperature and salinity changes exacerbate the effects of seawater acidification on the marine microalga Phaeodactylum tricornutum? THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 634:87-94. [PMID: 29626774 DOI: 10.1016/j.scitotenv.2018.03.314] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/25/2018] [Accepted: 03/25/2018] [Indexed: 06/08/2023]
Abstract
To evaluate the effects related to the combination of potential future changes in pH, temperature and salinity on microalgae, a laboratory experiment was performed using the marine diatom Phaeodactylum tricornutum. Populations of this species were exposed during 48h to a three-factor experimental design (3×2×2) with two artificial pH values (6, 7.4), two levels of temperature (23°C, 28°C), two levels of salinity (34psu, 40psu) and a control (pH8, Temp 23°C, Sal 34psu). The effects on growth, cell viability, metabolic activity, and inherent cell properties (size, complexity and autofluorescence) of P. tricornutum were studied using flow cytometry. The results showed adverse effects on cultures exposed to pH6 and high temperature and salinity, being the inherent cell properties the most sensitive response. Also, linked effects of these parameters resulted on cell viability and cell size decrease and an increase of cell autofluorescence. The conclusions obtained from this work are useful to address the potential effects of climate change (in terms of changes on pH, salinity and temperature) in microalgae.
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Affiliation(s)
- Esther Bautista-Chamizo
- Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Spain.
| | - Marta Sendra
- Departamento de Ecología y Gestión Costera, Instituto de Ciencias Marinas de Andalucía (CSIC), Spain
| | - Ángeles Cid
- Departamento de Biología, Facultad de Ciencias, Universidade da Coruña, Spain
| | - Marta Seoane
- Departamento de Biología, Facultad de Ciencias, Universidade da Coruña, Spain
| | - Manoela Romano de Orte
- Departamento de Ciências do Mar, Campus Baixada Santista, Universidade Federal de São Paulo, Brazil; Department of Global Ecology, Carnegie Institution for Science, Stanford, USA
| | - Inmaculada Riba
- Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Spain
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Díaz-García A, Borrero-Santiago AR, Riba I. Implications in studies of environmental risk assessments: Does culture medium influence the results of toxicity tests of marine bacteria? CHEMOSPHERE 2018; 205:24-30. [PMID: 29679785 DOI: 10.1016/j.chemosphere.2018.04.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 04/10/2018] [Accepted: 04/12/2018] [Indexed: 06/08/2023]
Abstract
Two marine bacterial populations (Roseobacter sp. and Pseudomonas litoralis) were exposed to different concentrations of zinc (300, 625, 1250, 2000, 2500 and 5000 mg L-1) and cadmium (75, 250, 340, 500 and 1000 mg L-1) using two culture media (full nutrient Marine Broth 2216 "MB" and 1:10 (vol/vol) dilution with seawater of Marine Broth 2216 "MBSW"), in order to assess population responses depending on the culture medium and also potential adverse effects associated with these two metals. Different responses were found depending on the culture medium (Bacterial abundance (cells·mL-1), growth rates (μ, hours-1), and production of Extracellular Polysaccharides Substances (EPS) (μg glucose·cells-1). Results showed negative effects in both strains after the exposure to Zn treatments. Both strains showed highest metal sensitivity at low concentrations using both culture media. However, different results were found when exposing the bacterial populations to Cd treatments depending on the culture medium. Highest toxicity was observed using MB at low levels of Cd concentrations, whereas MBSW showed toxicity to bacteria at higher concentrations of Cd. Results not only showed adverse effects on Roseobacter sp. and Pseudomonas litoralis associated with the concentration of Zn and Cd, but also confirm that depending on the culture medium results can differ. This work suggests MBSW as an adequate culture medium to study metal toxicity bioassays in order to predict realistic effects on marine bacterial populations.
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Affiliation(s)
- Alejandra Díaz-García
- UNESCO/UNITWIN Wicop, Department of Physical Chemistry, Faculty of Marine and Environmental Science, University of Cádiz, Polígono Río San Pedro S/n, 11510, Puerto Real, Cádiz, Spain; C.I.C.A. Ingenieros Consultores Perú S.A.C., Av. Javier Prado Este, 492, San Isidro, Lima, Peru
| | - Ana R Borrero-Santiago
- Norwegian University of Science and Technology, Department of Chemistry, 7491, Trondheim, Norway.
| | - Inmaculada Riba
- UNESCO/UNITWIN Wicop, Department of Physical Chemistry, Faculty of Marine and Environmental Science, University of Cádiz, Polígono Río San Pedro S/n, 11510, Puerto Real, Cádiz, Spain
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Passarelli MC, Riba I, Cesar A, DelValls TA. What is the best endpoint for assessing environmental risk associated with acidification caused by CO 2 enrichment using mussels? MARINE POLLUTION BULLETIN 2018; 128:379-389. [PMID: 29571386 DOI: 10.1016/j.marpolbul.2018.01.055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 12/12/2017] [Accepted: 01/25/2018] [Indexed: 06/08/2023]
Abstract
Carbon capture and storage is a technology that has been widely determined to be one of the best choices for the short-term reduction of atmospheric CO2 emissions. The aim of this study was to analyze the effects of CO2 enrichment in the ocean on the mussel species Mytilus galloprovincialis using three different endpoints: mortality, embryo-larval development, and neutral red retention time assays (NRRT). Acute effects were found to be associated with a pH values of 6.0 while citotoxity effects and embryo-larval development were associated with a pH value of 7.0. The NRRT assay and embryo-larval development can be recommended as good endpoints for assessing the environmental risk associated with acidification by CO2 enrichment because they provide sensitive responses on the effects of changes in seawater pH on mussels in a short period of time. Moreover, this study may support policymakers in finding appropriate solutions for the conservation of marine ecosystems.
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Affiliation(s)
- M C Passarelli
- Department of Chemistry, Aquatic Systems Research Group, UNESCO/UNITWIN WiCop, International Campus of Excellence of the Sea (CEIMAR), Cádiz, Spain.
| | - I Riba
- Department of Chemistry, Aquatic Systems Research Group, UNESCO/UNITWIN WiCop, International Campus of Excellence of the Sea (CEIMAR), Cádiz, Spain
| | - A Cesar
- Department of Ocean Sciences, Federal University of São Paulo (UNIFESP), Santos, São Paulo, Brazil; Department of Ecotoxicology, Santa Cecília University (UNISANTA), Santos, São Paulo, Brazil
| | - T A DelValls
- Department of Chemistry, Aquatic Systems Research Group, UNESCO/UNITWIN WiCop, International Campus of Excellence of the Sea (CEIMAR), Cádiz, Spain; Department of Ecotoxicology, Santa Cecília University (UNISANTA), Santos, São Paulo, Brazil
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Borrero-Santiago AR, DelValls TÁ, Inmaculada Riba M. Bacterial community responses during a possible CO 2 leaking from sub-seabed storage in marine polluted sediments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 593-594:116-123. [PMID: 28342412 DOI: 10.1016/j.scitotenv.2017.03.153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 03/16/2017] [Accepted: 03/16/2017] [Indexed: 06/06/2023]
Abstract
Carbon capture and storage (CCS) is a viable option to reduce high concentrations of CO2 and mitigate their negative effects. This option has associated risks such as possible CO2 leakage from the storage sites. So far, negative effects deriving from a CO2 release 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 CO2 injection 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 CO2 treatment. 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 CO2 leakage event or CO2 enrichment process among all the responses studied.
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Affiliation(s)
- Ana R 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 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 Inmaculada Riba
- 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
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Díaz-García A, Borrero-Santiago AR, Ángel DelValls T, Riba I. Simulating CO 2 leakage from sub-seabed storage to determine metal toxicity on marine bacteria. MARINE POLLUTION BULLETIN 2017; 116:80-86. [PMID: 28040253 DOI: 10.1016/j.marpolbul.2016.12.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 12/10/2016] [Accepted: 12/16/2016] [Indexed: 06/06/2023]
Abstract
CO2 storage in sub-seabed marine geological formations has been proposed as an adequate strategy to mitigate high CO2 concentration from the atmosphere. The lack of knowledge about the potential risks of this technology on marine bacteria population in presence of metals has lead us to perform laboratory-scale experiments in order to evaluate its consequences. Thus, the effects of Zn and Cd were studied under acid conditions on Roseobacter sp. and Pseudomonas litoralis. Bacterial abundance (cellsmL-1), growth rates (μ, h-1), relative inhibitory effects of CO2 (RICO2), and production of Extracellular Polysaccharides Substances (EPS) (μgGlucosecells-1) were evaluated. A decreasing exopolysaccharides (EPS) production was found under low pH. Bacterial abundance as well as growth rates showed negative effects. Data obtained in this work are useful to determine the potential effects associated with enrichment of CO2 and metals on the marine ecosystem.
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Affiliation(s)
- Alejandra Díaz-García
- 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.
| | - Ana R 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 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
| | - Inmaculada Riba
- 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
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