The deep ocean piezosphere accounts for a significant part of the global ocean, hosts active and diverse microbial communities which probably play a more important role than hitherto recognized in the global ocean carbon cycle. The conventional biological pump concept and the recently proposed microbial carbon pump mechanism provide a foundation for our understanding of the role of microorganisms in cycling of carbon in the ocean. However, there are significant gaps in our knowledge and a lack of mechanistic understanding of the processes of microbially-mediated production, transformation, degradation, and export of marine dissolved and particulate organic matter (DOM and POM) in the deep ocean and the ecological consequence. Here we propose the POM-DOM piezophilic microorganism continuum (PDPMC) conceptual model, to address these important biogeochemical processes in the deep ocean. We propose that piezophilic microorganisms (bacteria and archaea) play a pivotal role in deep ocean carbon cycle where microbial production of exoenzymes, enzymatic breakdown of DOM and transformation of POM fuels the rapid cycling of marine organic matter, and serve as the primary driver for carbon cycle in the deep ocean.

中文翻译：

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POM-DOM亲嗜性微生物连续体（PDPMC）—亲嗜性微生物在全球海洋碳循环中的作用

深海压电圈占全球海洋的重要部分，拥有活跃而多样的微生物群落，这些微生物群落可能比迄今在全球海洋碳循环中所发挥的作用更为重要。常规的生物泵概念和最近提出的微生物碳泵机制为我们理解微生物在海洋中碳循环中的作用提供了基础。但是，我们在深海中微生物介导的海洋溶解性和颗粒性有机物（DOM和POM）的生产，转化，降解和出口的过程以及对生态后果的认识还存在很大的空白，并且缺乏机械的理解。 。在这里，我们提出了POM-DOM亲嗜性微生物连续体（PDPMC）概念模型，解决深海中这些重要的生物地球化学过程。我们提出，嗜压微生物（细菌和古细菌）在深海碳循环中起着关键作用，其中微生物产生的外切酶，DOM的酶促分解和POM的转化为海洋有机物的快速循环提供了燃料，并且是碳的主要驱动力。在深海中循环。