The gut of the earthworm constitutes a mobile anoxic microzone to which the microorganisms of aerated soils are subjected. During gut passage, the in situ factors of the earthworm gut, which include anoxia and high concentrations of organic substrates, appear to greatly stimulate a subset of ingested soil microorganisms, including denitrifying and fermentative bacteria. The selective stimulation of ingested soil microbes by the unique microconditions of the earthworm gut (a) results in the in vivo emission of denitrification-derived dinitrogen (N(2)) and the greenhouse gas nitrous oxide (N(2)O) by the earthworm, and (b) might affect the fitness, culturability, and diversity of certain members of soil microbial biomes. These observations illustrate the impact that soil macrofauna might have on terrestrial nitrogen cycle processes via their transient hosting of ingested prokaryotes.

中文翻译：

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随着蠕虫的旋转：the肠道是土壤微生物群落的暂时栖息地。

worm的肠道构成一个可移动的缺氧微区，充气土壤中的微生物会受到该微区的影响。在肠道通过过程中，worm肠道的原位因子（包括缺氧和高浓度的有机底物）似乎极大地刺激了一部分摄入的土壤微生物，包括反硝化细菌和发酵细菌。worm肠道的独特微观条件选择性刺激摄入的土壤微生物（a）导致体内反硝化衍生的二氧化氮（N（2））和温室气体一氧化二氮（N（2）O）的体内排放。 and（b）可能会影响土壤微生物群落某些成员的适应性，可培养性和多样性。