Impact of sub-seabed CO 2 leakage on macrobenthic community structure and diversity
Impact of sub-seabed CO 2 leakage on macrobenthic community structure and diversity
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海底CO 2 泄漏对大型底栖动物群落结构和多样性的影响
DOI：
10.1016/j.ijggc.2015.01.003
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发表时间：
2015
影响因子：
3.9
通讯作者：
Widdicombe S
中科院分区：
文献类型：
--
作者：
Widdicombe S
进行了海底二氧化碳（CO2）释放，以评估海底地质二氧化碳捕获和储存（CCS）泄漏对海底大型动物的潜在影响。二氧化碳气体在海床下12米处释放了37天，对沉积物碳酸盐化学造成了重大破坏。从活跃的CO2泄漏区（1区）和另外三个参照区，即距离泄漏中心25米、75米和450米的参照区（分别为2区、3区和4区）收集了常规大型底栖动物样本。在研究期间，所有区域的大型底栖动物群落结构都发生了显著变化。然而，只有1区的变化是由CO2泄漏驱动的，而参考区的变化似乎反映了自然的季节性演替和随机的天气事件。1区的影响发生迅速（在几天内），在泄漏期间严重程度增加，并在泄漏停止后继续恶化。在CO2气体注入停止后18天，大型底栖动物出现了相当大的恢复。总之，小型短期CCS泄漏事件有可能对大型底栖动物群落造成高度局部化的影响，并有可能迅速恢复，这取决于受影响的群落和生境的特点。
A sub-seabed release of carbon dioxide (CO2) was conducted to assess the potential impacts of leakage from sub-seabed geological CO2Capture and Storage CCS) on benthic macrofauna. CO2gas was released 12 m below the seabed for 37 days, causing significant disruption to sediment carbonate chemistry. Regular macrofauna samples were collected from within the area of active CO2leakage (Zone 1) and in three additional reference areas, 25 m, 75 m and 450 m from the centre of the leakage (Zones 2, 3 and 4 respectively). Macrofaunal community structure changed significantly in all zones during the study period. However, only the changes in Zone 1 were driven by the CO2leakage with the changes in reference zones appearing to reflect natural seasonal succession and stochastic weather events. The impacts in Zone 1 occurred rapidly (within a few days), increased in severity through the duration of the leak, and continued to worsen after the leak had stopped. Considerable macrofaunal recovery was seen 18 days after the CO2gas injection had stopped. In summary, small short-term CCS leakage events are likely to cause highly localised impacts on macrofaunal communities and there is the potential for rapid recovery to occur, depending on the characteristics of the communities and habitats impacted.