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中国三峡水库典型支流沉积物中 comammoxNitrospira 的生态位分化。

Niche differentiation of comammox Nitrospira in sediments of the Three Gorges Reservoir typical tributaries, China.

机构信息

State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, Beijing, 10038, People's Republic of China.

Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing, 100038, People's Republic of China.

出版信息

Sci Rep. 2022 Apr 26;12(1):6820. doi: 10.1038/s41598-022-10948-9.

DOI:10.1038/s41598-022-10948-9
PMID:35474096
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9042867/
Abstract

Complete ammonia oxidizer (Comammox) can complete the whole nitrification process independently, whose niche differentiation is important guarantee for its survival and ecological function. This study investigated the niche differentiation of comammox Nitrospira in the sediments of three typical tributaries of the Three Gorges Reservoir (TGR). Clade A and clade B of comammox Nitrospira coexisted in all sampling sites simultaneously. The amoA gene abundance of clade A and B was gradually increased or decreased along the flow path of the three tributaries with obvious spatial differentiation. The amoA gene abundance of comammox Nitrospira clade A (6.36 × 10 - 5.06 × 10 copies g dry sediment) was higher than that of clade B (6.26 × 10 - 6.27 × 10 copies g dry sediment), and the clade A amoA gene abundance was one order of magnitude higher than that of AOA (7.24 × 10 - 6.89 × 10 copies g dry sediment) and AOB (1.44 × 10 - 1.46 × 10 copies g dry sediment). A significant positive correlation was observed between comammox Nitrospira clade A amoA gene abundance and flow distance (P < 0.05). The number of operational taxonomic units (OTUs) in two sub-clades of clade A accounted for the majority in different tributaries, indicating that clade A also had population differentiation among different tributaries. This study revealed that comammox Nitrospira in the sediments of TGR tributaries have niche differentiation and clade A.2 played a more crucial role in comammox Nitrospira community.

摘要

完全氨氧化菌（Comammox）能够独立完成整个硝化过程，其生态位分化是其生存和生态功能的重要保障。本研究调查了三峡水库（TGR）三条典型支流沉积物中 Comammox Nitrospira 的生态位分化。所有采样点均同时存在 clade A 和 clade B 的 Comammox Nitrospira。随着三条支流的水流路径，clade A 和 B 的 amoA 基因丰度逐渐增加或减少，具有明显的空间分化。clade A 的 amoA 基因丰度（6.36×10-5.06×10 拷贝 g 干沉积物）高于 clade B（6.26×10-6.27×10 拷贝 g 干沉积物），且 clade A 的 amoA 基因丰度比 AOA（7.24×10-6.89×10 拷贝 g 干沉积物）和 AOB（1.44×10-1.46×10 拷贝 g 干沉积物）高一个数量级。Comammox Nitrospira clade A amoA 基因丰度与水流距离呈显著正相关（P<0.05）。不同支流中 clade A 的两个亚群的 OTUs 数量占多数，表明 clade A 也存在不同支流间的种群分化。本研究表明，TGR 支流沉积物中的 Comammox Nitrospira 具有生态位分化，clade A.2 在 Comammox Nitrospira 群落中发挥更关键的作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/4db08625cc0b/41598_2022_10948_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/7038b8a97297/41598_2022_10948_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/2ed90607acd4/41598_2022_10948_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/04ea60b9e49f/41598_2022_10948_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/0fcf2bd037d1/41598_2022_10948_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/afc98095a71b/41598_2022_10948_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/21bc773c4596/41598_2022_10948_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/ac44aac2fcf8/41598_2022_10948_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/4db08625cc0b/41598_2022_10948_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/7038b8a97297/41598_2022_10948_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/2ed90607acd4/41598_2022_10948_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/04ea60b9e49f/41598_2022_10948_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/0fcf2bd037d1/41598_2022_10948_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/afc98095a71b/41598_2022_10948_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/21bc773c4596/41598_2022_10948_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/ac44aac2fcf8/41598_2022_10948_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edc9/9042867/4db08625cc0b/41598_2022_10948_Fig8_HTML.jpg

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本文引用的文献

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Towards a more labor-saving way in microbial ammonium oxidation: A review on complete ammonia oxidization (comammox).迈向更节省劳动力的微生物氨氧化方法：全面氨氧化（comammox）综述。
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