Community assembly mechanisms and co-occurrence patterns of nitrite-oxidizing bacteria communities in saline soils

Li, Xiang; Wan, Wenjie; Zheng, Liuxia; Wang, Achen; Luo, Xuesong; Huang, Qiaoyun; Chen, Wenli

doi:10.1016/j.scitotenv.2021.145472

Cited by 31 publications

(14 citation statements)

References 70 publications

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“…Soil organic matter content ranged from 4.0 to 51.6 g kg −1 and was negatively correlated with soil EC (R 2 = 0.18, p < 0.01). Moreover, the soil EC showed a significant negative correlation with soil NH 4 + -N (R 2 = 0.200, p < 0.01) and TN (R 2 = 0.247, p < 0.01) content [24].…”

Section: Characteristics Of the Soil Propertiesmentioning

confidence: 94%

“…Considering that weak niche differentiation possibly results in stronger interactions between soil microorganisms [62], it is reasonable to see that salinity decreased correlations between N-cycle-related microbes since niche differentiation became strong under a higher salinity. Our previous study showed that the network within Nitrospira collapsed while Nitrobacter was resistant to high salinity [24].…”

Section: Impact Of Salinity On the Community Structure Of Nitrifiers ...mentioning

confidence: 96%

“…One aliquot was air-dried and used to analyze the physicochemical factors. The physicochemical factors, including total carbon (TC), total nitrogen (TN), total sulfur (TS), Electrical conductivity (EC), soil organic matter (SOM), total phosphorus (TP), total potassium (TK), available phosphorus (AP), available potassium (AK), soil pH, NH 4 + -N and NO 3 − -N have been determined in our previous study [24]. The other was stored under −80 • C for DNA extraction.…”

Section: Study Area and Soil Backgroundmentioning

confidence: 99%

“…Yue et al (2020) found that Nitrobacter played a critical role in saline soil nitrification, and its abundance positively correlates with soil salinity [23]. The interactions between NOB members were likely blocked by high salinity [24]. Environmental factors explain nitrifying bacterial community structure in environments with different salinity backgrounds [12,16,25].…”

Section: Introductionmentioning

confidence: 99%

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Response of Nitrifier and Denitrifier Abundance to Salinity Gradients in Agricultural Soils at the Yellow River Estuary

Huang

Luo

2022

Agronomy

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Salinization is considered a threat to agricultural soil and decreases crop yield worldwide. Nitrification and denitrification are the core processes of soil N-cycle. However, the response of nitrifiers and denitrifiers to salinity in agricultural soils remains ambiguous. The study aimed to explore the effect of salinity on nitrifiers and denitrifiers communities in agricultural soils along a naturally occurring salinity gradient. The effects of salinity on the abundance, composition, and interactions of nitrifiers and denitrifiers in surface soils were investigated. The abundance of nitrifiers significantly decreased in response to the increase in salinity. Ammonia-oxidizing archaea (AOA) were more susceptible to salinity elevation than ammonia-oxidizing bacteria (AOB). Nitrospira and Nitrobacter showed a similar trend to the salinity gradient, but the relative abundance of Nitrobacter was increased in the saline soils. High salinity decreased the abundance of napA and nirK, but had no significant effect on other marker genes for denitrification. Besides electrical conductivity, total sulfur (TS)+available potassium (AK) and TN+TS+C/N+total phosphorus (TP)+AK significantly explained the variation in denitrifier and nitrifier communities. We also found that high salinity decreased the connections between different N functional genes. These results implied the alteration of the nitrogen cycling community by high salinity mainly through decreasing AOA, NOB, and some denitrifiers with nitrate or nitrite reduction potentials and weakening the connectivity between nitrogen cycling drivers.

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Section: Characteristics Of the Soil Propertiesmentioning

confidence: 94%

Section: Impact Of Salinity On the Community Structure Of Nitrifiers ...mentioning

confidence: 96%

Section: Study Area and Soil Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Response of Nitrifier and Denitrifier Abundance to Salinity Gradients in Agricultural Soils at the Yellow River Estuary

Huang

Luo

2022

Agronomy

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“…A less diverse microbiology community appeared to be associated with salinity in most cases (Hong et al, 2019). N. marina affiliated to lineage IV has widely adapted to variable salinity (Zhao et al, 2021), which may make it widely present in salinity ecosystems, including deep sea, estuary area, and saline soils (Pester et al, 2014;Hong et al, 2021;Li et al, 2021;Zhao et al, 2021). Ca.…”

Section: Environmental Factors Affecting the Abundance And Distributi...mentioning

confidence: 99%

Distribution, Diversity, and Abundance of Nitrite Oxidizing Bacteria in the Subterranean Estuary of the Daya Bay

Sun

Jiao

et al. 2022

Front. Mar. Sci.

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The oxidation of nitrite to nitrate as the second step of nitrification is vital for the global nitrogen cycle, and the genus Nitrospira is the most widespread nitrite-oxidizing bacteria (NOB) in diverse natural ecosystems. However, our understanding of Nitrospira distribution and their response to dynamic environmental parameters is still limited in the subterranean estuary (STE), a special environment of the mixed zone between land and sea. In this study, Nitrospira communities were collected within 5–10 cm depth intervals of sediments with the physiochemical gradients along the transections of the Daya Bay (DYB) from the landward member to the seaward member. The abundance, community structure of Nitrospira, and their potentially influencing environmental factors were investigated using Q-PCR, the high throughput sequencing targeting Nitrospira nxrB gene, and biostatistics analyses. The abundance of Nitrospira showed uniform distribution along the transections, but significantly decreasing variations were observed from the surface (<20 cm) to the bottom (>20 cm) of sediments. The community diversity and structure of Nitrospira also displayed a remarkable vertical distribution in the DYB (STE), although no significant differences were observed along the transections of STE. Nitrospira marina (N. marina) predominated in the sediments, Candidatus Nitrospira bockiana (Ca. N. bockiana), and Candidatus Nitrospira defluvii (Ca. N. defluvii) were the main Nitrospira species, and Candidatus Nitrospira lenta (Ca. N. lenta) and Nitrospira japonica (N. japonica) also existed with relatively low abundance in the DYB (STE). These findings revealed that Nitrospira species (Ca. N. defluvii, Ca. N. lenta, and N. japonica) derived from activated sludge was also widespread in natural habitats and deduced that the STE may be affected by the pollution derived from terrigenous human activities. The statistical analysis combined with the STE dynamic variation indicated that dissolved organic carbon (DOC), salinity, and ammonium along the sediment depths attributed to the vertical community distribution of the Nitrospira species. In summary, the vertical distribution of Nitrospira and their response to the dynamic physicochemical parameters imply their important role in the nitrite oxidation of the STE and provide insights into the niche differentiation and diversely physiologic metabolism of NOB.

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Niche specialization and ecophysiological adaptation strategies of salt-tolerant nitrite oxidizers in soil

Sun

Zhao²,

Bei

et al. 2022

Biol Fertil Soils

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Community assembly mechanisms and co-occurrence patterns of nitrite-oxidizing bacteria communities in saline soils

Cited by 31 publications

References 70 publications

Response of Nitrifier and Denitrifier Abundance to Salinity Gradients in Agricultural Soils at the Yellow River Estuary

Response of Nitrifier and Denitrifier Abundance to Salinity Gradients in Agricultural Soils at the Yellow River Estuary

Distribution, Diversity, and Abundance of Nitrite Oxidizing Bacteria in the Subterranean Estuary of the Daya Bay

Niche specialization and ecophysiological adaptation strategies of salt-tolerant nitrite oxidizers in soil

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