Département des sciences biologiques, Université du Québec à Montréal (UQAM), 141 Avenue du Président-Kennedy, Montréal, Quebec, Canada H2X 1Y4.
Biol Lett. 2020 Feb;16(2):20190694. doi: 10.1098/rsbl.2019.0694. Epub 2020 Feb 26.
The transit of organic matter (OM) through the aquatic compartment of its global cycle has been intensively studied, traditionally with a focus on the processing and degradation of its dissolved fraction (dissolved organic matter, DOM). Because this is so intimately related to oxidation, the notion tenaciously persists that where oxygen is absent, DOM turnover is markedly slowed. In this Opinion Piece, we outline how diverse processes shape, transform and degrade DOM also in anoxic aquatic environments, and we focus here on inland waters as a particular case study. A suite of biogeochemical DOM functions that have received comparatively little attention may only be expressed in anoxic conditions and may result in enhanced biogeochemical roles of these deoxygenated habitats on a network scale.
有机物质（OM）在其全球循环的水生部分的迁移已经得到了深入研究，传统上侧重于其溶解部分（溶解有机物质，DOM）的处理和降解。因为这与氧化密切相关，所以一直存在这样的观点，即在没有氧气的情况下，DOM 的周转明显减慢。在这篇观点文章中，我们概述了各种过程是如何塑造、转化和降解 DOM 的，即使在缺氧的水生环境中也是如此，我们在这里特别关注内陆水域作为一个案例研究。一套生物地球化学 DOM 功能，相对较少受到关注，可能只在缺氧条件下表达，并可能导致这些缺氧生境在网络尺度上发挥增强的生物地球化学作用。
