Response of bacterial communities in Barents Sea sediments in case of a potential CO2 leakage from carbon reservoirs.
Response of bacterial communities in Barents Sea sediments in case of a potential CO2 leakage from carbon reservoirs.
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DOI：
10.1016/j.marenvres.2020.105050
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发表时间：
2020-09
影响因子：
3.3
通讯作者：
A. R. Borrero-Santiago;Deni Ribicic;E. Bonnail;R. Netzer;Deni Koseto;M. Ardelan
中科院分区：
文献类型：
--
作者：
A. R. Borrero-Santiago;Deni Ribicic;E. Bonnail;R. Netzer;Deni Koseto;M. Ardelan
作为减缓气候变化活动的一部分，巴伦支海陆架的碳捕获和储存地点目前正在进行中。然而，人们对可能的二氧化碳渗漏对细菌群落的环境影响缺乏了解。这项工作解决了巴伦支海沉积物 Snøvit 地区细菌群落的潜在后果。使用独特的高压舱 (Karl Erik TiTank) 模拟现实压力条件 (∼30 bar) 进行长期实验（92 天）。实验分为三个阶段：i) 21 天无二氧化碳，ii) 50 天模拟二氧化碳泄漏（pH 值降至 7.0）和 iii) 14 天模拟泄漏停止。结果表明，细菌群落可以在短期内适应二氧化碳泄漏。然而，长期接触二氧化碳后，细菌在活性、群落结构和细胞数量方面表现出负面影响。二氧化碳泄漏停止后，细菌群落没有表现出显着的恢复。这些发现强调，尽管海洋细菌表现出对新条件（酸化环境）的适应，但如果发生少量但持续的二氧化碳泄漏，海洋细菌可能无法恢复到暴露前的状态。
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 CO2seepage 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 CO2leakage in short term. However, bacteria showed negative effects in terms of activity, community structure, and number of cells after long term CO2exposure. After CO2leakage 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 CO2leakage marine bacteria might not be recovered upon pre-exposure status.