Alterations in the macrobenthic fauna from Guadarranque River (Southern Spain) associated with sediment–seawater acidification deriving from CO2 leakage

•The impacts of CO2-induced acidification on a macrobenthic community was evaluated.•We developed a mesocosm experiment with different levels of acidified seawater.•Alkalinity was demonstrated as the principal effect of seawater acidification.•Results showed a different specific sensibility. Nowaday...

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Bibliographic Details
Published in:Marine pollution bulletin 2015-07, Vol.96 (1-2), p.65-75
Main Authors: Almagro-Pastor, V., Conradi, M., DelValls, T.A., Riba, I.
Format: Article
Language:English
Subjects:
Animals
Carbon capture and storage
Carbon Dioxide - analysis
CO2 leakage
Cyathura carinata
Environmental Monitoring
Geologic Sediments - chemistry
Hediste diversicolor
Hydrogen-Ion Concentration
Macrobenthic
Mesocosm experiments
Ocean acidification
Polychaeta - drug effects
Polychaeta - growth & development
Rivers - chemistry
Seawater - chemistry
Spain
Water Pollutants, Chemical - analysis
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Summary:•The impacts of CO2-induced acidification on a macrobenthic community was evaluated.•We developed a mesocosm experiment with different levels of acidified seawater.•Alkalinity was demonstrated as the principal effect of seawater acidification.•Results showed a different specific sensibility. Nowadays, Carbon Storage in Sub-Seabed Geological Structures (CS-SSGS) is having much interest. Nonetheless, these technologies are still under development, especially the leakage of the stored CO2 and the consequent acidification of the environment. Therefore, the goal of this study is to test the impact of CO2-induced acidification on a macrobenthic community due to leakages from CS-SSGS using a mesocosm-based experiment. Results confirmed the significant correlation between the abundance of the species and the pH (positively), and the alkalinity (negatively). Additionally, the BIOENV analysis showed that the majority of the variability in the abundance of the total species was explained for the alkalinity. The correlation analysis showed differential vulnerabilities of different species, especially Cyathura carinata and a non-calcifier species as Hediste diversicolor. Nevertheless, these results showed the importance of taking into account the indirect effect associated with acidification processes, as metal release from sediment.
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2015.05.044