Response of bacterial communities in Barents Sea sediments in case of a potential CO2 leakage from carbon reservoirs

Highlights

  • Simulation of real conditions of a CCS site are essentials for environmental risk assessments.

  • Marine bacteria may adapt to a new situation in case of acidification event for a short time.

  • Marine bacteria community is altered in case of a CO2 leakage after 3 weeks in long-term simulation.

  • Results did not show a potential recovery of marine bacteria when CO2 was stopped within the monitored period.

Abstract

Carbon capture and storage sites in Barents Sea shelf are currently in progress as part of climate change mitigation activities. However environmental impacts of a possible CO2 seepage on bacterial community are lacking knowledge. This work addressed potential consequences on bacterial communities from Snøvit region in Barents Sea sediments. Long-term experiment (92 days) was carried out mimicking realistic conditions of pressure (∼30 bars) using the unique hyperbaric chamber (Karl Erik TiTank). The experiment was divided in three stages: i) 21 days of no CO2, ii) 50 days of simulation of carbon dioxide leakage (depletion of pH to 7.0) and iii) 14 days emulating a leakage cessation. Results suggested that bacterial communities can adapt to a CO2 leakage in short term. However, bacteria showed negative effects in terms of activity, community structure, and number of cells after long term CO2 exposure. After CO2 leakage cessation, bacterial communities did not show a significant recovery. These findings highlighted that, even though marine bacteria showed adaptation to the new conditions (acidified environment), in case of a small but continuous CO2 leakage marine bacteria might not be recovered upon pre-exposure status.

    Borrero-Santiago A. R., Ribicic D., Bonnail E., Netzer R., Koseto D. &  Ardelan M. V., 2020. Response of bacterial communities in Barents Sea sediments in case of a potential CO2 leakage from carbon reservoirs. Marine Environmental Research 160: 105050. doi: 10.1016/j.marenvres.2020.105050. Article (subscription required).

    0 Responses to “Response of bacterial communities in Barents Sea sediments in case of a potential CO2 leakage from carbon reservoirs”



    1. Leave a Comment

    Leave a Reply

    Fill in your details below or click an icon to log in:

    WordPress.com Logo

    You are commenting using your WordPress.com account. Log Out /  Change )

    Google photo

    You are commenting using your Google account. Log Out /  Change )

    Twitter picture

    You are commenting using your Twitter account. Log Out /  Change )

    Facebook photo

    You are commenting using your Facebook account. Log Out /  Change )

    Connecting to %s

    This site uses Akismet to reduce spam. Learn how your comment data is processed.




    Subscribe to the RSS feed

    Powered by FeedBurner

    Follow AnneMarin on Twitter

    Blog Stats

    • 1,385,430 hits

    OA-ICC HIGHLIGHTS

    Ocean acidification in the IPCC AR5 WG II

    OUP book