Microbial Respiration, the Engine of Ocean Deoxygenation
Microbial Respiration, the Engine of Ocean Deoxygenation
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微生物呼吸，海洋脱氧的引擎
DOI：
10.3389/fmars.2018.00533
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发表时间：
2019-01
影响因子：
3.7
通讯作者：
C. Robinson
中科院分区：
文献类型：
--
作者：
C. Robinson
浮游微生物的呼吸作用是海洋中有机碳储存或其转化为二氧化碳并伴随溶解氧消耗之间平衡的关键决定因素。在过去的50年里，世界海洋许多地方的溶解氧浓度已经下降，预计这种海洋脱氧的趋势将继续下去。然而，尽管微生物呼吸在海洋脱氧中起着关键作用，但它仍然是受限制最少的微生物代谢过程之一。更好地了解呼吸的幅度和变异，包括浮游生物组分的归属，以及呼吸商的量化，将有助于更好地预测和预估海洋脱氧的强度和程度，以及海洋脱氧、海洋酸化、变暖、营养物浓度和化学计量学变化对海洋碳储量的综合影响。本研究将综合当前与脱氧相关的呼吸知识，包括其可变性的驱动因素，确定我们预测未来情景能力中的关键未知因素，并提出推动该领域向前发展的方法方法。
Microbial plankton respiration is the key determinant in the balance between the storage of organic carbon in the oceans or its conversion to carbon dioxide with accompanying consumption of dissolved oxygen. Over the past fifty years, dissolved oxygen concentrations have decreased in many parts of the world’s oceans, and this trend of ocean deoxygenation is predicted to continue. Yet despite its pivotal role in ocean deoxygenation, microbial respiration remains one of the least constrained microbial metabolic processes. Improved understanding of the magnitude and variability of respiration, including attribution to component plankton groups, and quantification of the respiratory quotient, would enable better predictions and projections of the intensity and extent of ocean deoxygenation and of the integrative impact of ocean deoxygenation, ocean acidification, warming, and changes in nutrient concentration and stoichiometry on marine carbon storage. This study will synthesize current knowledge of respiration in relation to deoxygenation, including the drivers of its variability, identify key unknowns in our ability to project future scenarios and suggest methodological approaches to move the field forward.