Environ Microbiol Rep. 2014 Dec;6(6):574-82. doi: 10.1111/1758-2229.12159.
It is well established that the release of anthropogenic-derived CO2 into the atmosphere will be mainly absorbed by the oceans, with a concomitant drop in pH, a process termed ocean acidification. As such, there is considerable interest in how changes in increased CO2 and lower pH will affect marine biota, such as bacteria, which play central roles in oceanic biogeochemical processes. Set within an ecological framework, we investigated the direct effects of elevated CO2, contrasted with ambient conditions on the resistance and resilience of marine bacterial communities in a replicated temporal seawater mesocosm experiment. The results of the study strongly indicate that marine bacterial communities are highly resistant to the elevated CO2 and lower pH conditions imposed, as demonstrated from measures of turnover using taxa–time relationships and distance–decay relationships. In addition, no significant differences in community abundance, structure or composition were observed. Our results suggest that there are no direct effects on marine bacterial communities and that the bacterial fraction of microbial plankton holds enough flexibility and evolutionary capacity to withstand predicted future changes from elevated CO2 and subsequent ocean acidification.
众所周知，人为产生的二氧化碳排放到大气中，主要会被海洋吸收，从而导致 pH 值下降，这一过程被称为海洋酸化。因此，人们非常关注增加的二氧化碳和更低的 pH 值将如何影响海洋生物群，如细菌，它们在海洋生物地球化学过程中起着核心作用。在生态框架内，我们研究了在复制的时间海水中型生态系统实验中，升高的二氧化碳与环境条件对海洋细菌群落的抵抗力和恢复力的直接影响。研究结果强烈表明，海洋细菌群落对施加的升高的二氧化碳和更低的 pH 值条件具有很强的抵抗力，这可以从使用分类群-时间关系和距离-衰减关系来衡量周转率的措施中得到证明。此外，没有观察到群落丰度、结构或组成有显著差异。我们的结果表明，海洋细菌群落没有受到直接影响，微生物浮游生物的细菌部分具有足够的灵活性和进化能力，可以承受未来因二氧化碳升高和随后的海洋酸化而产生的变化。
