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首页> 美国卫生研究院文献>Frontiers in Microbiology >Impact of CO2 leakage from sub-seabed carbon dioxide capture and storage (CCS) reservoirs on benthic virus–prokaryote interactions and functions
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Impact of CO2 leakage from sub-seabed carbon dioxide capture and storage (CCS) reservoirs on benthic virus–prokaryote interactions and functions

机译：海底二氧化碳捕获和封存（CCS）储层泄漏的CO2对底栖病毒-原核生物的相互作用和功能的影响

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Atmospheric CO2 emissions are a global concern due to their predicted impact on biodiversity, ecosystems functioning, and human life. Among the proposed mitigation strategies, CO2 capture and storage, primarily the injection of CO2 into marine deep geological formations has been suggested as a technically practical option for reducing emissions. However, concerns have been raised that possible leakage from such storage sites, and the associated elevated levels of pCO2 could locally impact the biodiversity and biogeochemical processes in the sediments above these reservoirs. Whilst a number of impact assessment studies have been conducted, no information is available on the specific responses of viruses and virus–host interactions. In the present study, we tested the impact of a simulated CO2 leakage on the benthic microbial assemblages, with specific focus on microbial activity and virus-induced prokaryotic mortality (VIPM). We found that exposure to levels of CO2 in the overlying seawater from 1,000 to 20,000 ppm for a period up to 140 days, resulted in a marked decrease in heterotrophic carbon production and organic matter degradation rates in the sediments, associated with lower rates of VIPM, and a progressive accumulation of sedimentary organic matter with increasing CO2 concentrations. These results suggest that the increase in seawater pCO2 levels that may result from CO2 leakage, can severely reduce the rates of microbial-mediated recycling of the sedimentary organic matter and viral infections, with major consequences on C cycling and nutrient regeneration, and hence on the functioning of benthic ecosystems.
机译：大气中的二氧化碳排放量因其对生物多样性，生态系统功能和人类生活的预期影响而受到全球关注。在提议的缓解策略中，CO 2的捕获和储存（主要是将CO 2注入海洋深层地质构造中）已被建议作为减少排放的技术上可行的选择。但是，人们提出了这样的担忧：从这些储存地点可能发生泄漏，以及相关的pCO2水平升高，可能会局部影响这些水库上方沉积物中的生物多样性和生物地球化学过程。尽管已经进行了许多影响评估研究，但没有有关病毒和病毒-宿主相互作用的具体反应的信息。在本研究中，我们测试了模拟的CO2泄漏对底栖微生物组合的影响，特别是微生物活性和病毒诱导的原核生物死亡率（VIPM）。我们发现，在长达140天的时间内，上层海水中的CO2浓度从1,000 ppm降至20,000 ppm会导致沉积物中异养碳产量和有机物降解率显着下降，这与VIPM降低有关，随着二氧化碳浓度的增加，沉积有机物逐渐积累。这些结果表明，可能由于CO2泄漏而导致的海水中pCO2含量的增加，会严重降低微生物介导的沉积有机物和病毒感染的循环利用率，对碳循环和养分再生产生重大影响，从而对底栖生态系统的功能。

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