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氨氧化古生物和来自淡水环境的完全氨氧化剂之间的竞争

Sabita Ghimire-Kafle¹, Matt E Weaver¹, Madisen P Kimbrel¹

¹Department of Microbiology, Miami University, Oxford, Ohio, USA.

Applied and environmental microbiology

|February 13, 2024

概括

完整的氨氧化剂 (comammox) 超过了氨氧化古生物 (AOA) 在淡水中的氨中,在所有测试条件下占主导地位. 这表明comammox可能在低环境中比较普遍,比如伯尔湖.

科学领域:

微生物学微生物学
环境科学环境科学
生物地质化学生物地质化学

背景情况:

有氧氨氧化剂 (AO) 对循环至关重要,催化氨氧化.
氨氧化古生物 (AOA) 和完全氨氧化剂 (comammox) 是低氨环境中的关键化剂.
目前,AOA和comammox之间的竞争动态尚不清楚.

研究的目的:

调查AOA和comammox之间对的竞争.
在淡水系统中在不同度下确定主导的化剂.

主要方法:

来自伯尔湖树的AOA (AOA-BO1) 和comammox (cmx-BO4) 的丰富培养.
使用连续和批量种植的竞争实验,使用受控的氨含量 (50和500微米).

主要成果:

科马莫克斯 (Nitrospira sp. 尼托斯皮拉) 是一种 BO4) 始终在竞争中超越了AOA (Nitrosarchaeum sp. 在所有测试的氨度下.
康马莫克斯的主导地位可能是由于更高效的能源发电和碳固定通过减少的TCA循环.
在伯尔湖树沉积物中观察到的comammox比AOA的丰度更高.

结论:

康马莫克斯是AOA在淡水环境中的的优越竞争对手.
康马莫克斯可能比以前认为的在寡质淡水生态系统中对化起着更重要的作用.
了解这些竞争性相互作用对于阐明化剂的生态利基至关重要.

关键词:

氨氧化的氨氧化.氧化氨的古代生物.作为一个comammox.竞争竞争竞争竞争竞争竞争淡水淡水水的情况.化化化化化化

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