Cultivation and characterization of a novel clade of deep-sea Chloroflexi: providing a glimpse of the phylum Chloroflexi involved in sulfur cycling

Zheng, Rikuan; Cai, Ruining; Liu, Rui; Shan, Yeqi; Liu, Ge; Sun, Chaomin

doi:10.1101/2021.01.05.425403

Cited by 2 publications

(1 citation statement)

References 70 publications

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“…Several additional predictor taxa a liated with Chloro exi and Firmicutes increased across the chronosequence which furthermore suggested an increasing role for fermentation and possibly organic sulfur cycling. Chloro exi are putatively involved in carbon and sulfur cycles [132,133]. While several predictor taxa among Chloro exi decreased in surface soils (Caldilineaceae and JG30-KF-AS9), numerous taxa a liated to this phylum increased in the subsurface horizons, including unclassi ed members of the classes Anaerolineae and Dehalococcoidia.…”

Section: Trajectories Of Microbial Community Structurementioning

confidence: 99%

Microbial Community Succession Along a Chronosequence in Constructed Salt Marsh Soils

et al. 2023

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In this study, we examined the succession of soil microbial communities across a chronosequence of newly constructed salt marshes constructed primarily of ne-grained dredge material, using 16S rRNA amplicon sequences. Alpha diversity in the parent material was initially low and increased to reference levels within 3 years of marsh construction, while in the newly accumulating organic matter-rich surface soils alpha diversity was initially high and remained unchanged. Microbial community succession was fastest in the surface horizon (~ 24 years to reference equivalency) and became progressively slower with depth in the subsurface horizons (~ 30-67 years). Random forest linear regression analysis was used to identify important taxa driving the trajectories toward reference conditions. In the parent material, putative sulfate-reducers (Desulfobacterota), methanogens (Crenarchaeota, especially Methanosaeta), and fermenters (Chloro exi and Clostridia) increased over time, suggesting an enrichment of these metabolisms over time, similar to natural marshes. Concurrently in the surface soils, the relative abundances of putative methane-, methyl-, and sul de oxidizers, especially among Gammaproteobacteria, increased over time, suggesting the co-development of sul de and methane removal metabolisms in the marsh soils. Finally, we observed that the surface soil communities at one of the marshes did not follow the trajectory of the others, exhibiting a greater relative abundance of anaerobic taxa. Uniquely in this dataset, this marsh was developing signs of excessive inundation stress in terms of vegetation coverage and soil geochemistry. Therefore, we suggest that soil microbial community structures may be effective bioindicators of salt marsh inundation and are worthy of further targeted investigation.

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Section: Trajectories Of Microbial Community Structurementioning

confidence: 99%

Microbial Community Succession Along a Chronosequence in Constructed Salt Marsh Soils

et al. 2023

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Microbial community succession along a chronosequence in constructed salt marsh soils

Kim

Staver

Chen

et al. 2022

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In this study, we examined the succession of soil microbial communities across a chronosequence of newly constructed salt marshes constructed primarily of fine-grained dredge material, using 16S rRNA amplicon sequences. Alpha diversity in the parent material was initially low and increased to reference levels within 3 years of marsh construction, while in the newly accumulating organic matter-rich surface soils alpha diversity was initially high and remained unchanged. Microbial community succession was fastest in the surface horizon (~ 24 years to reference equivalency) and became progressively slower with depth in the subsurface horizons (~ 30–67 years). Random forest linear regression analysis was used to identify important taxa driving the trajectories toward reference conditions. In the parent material, putative sulfate-reducers (Desulfobacterota), methanogens (Crenarchaeota, especially Methanosaeta), and fermenters (Chloroflexi and Clostridia) increased over time, suggesting an enrichment of these metabolisms over time, similar to natural marshes. Concurrently in the surface soils, the relative abundances of putative methane-, methyl-, and sulfide oxidizers, especially among Gammaproteobacteria, increased over time, suggesting the co-development of sulfide and methane removal metabolisms in the marsh soils. Finally, we observed that the surface soil communities at one of the marshes did not follow the trajectory of the others, exhibiting a greater relative abundance of anaerobic taxa. Uniquely in this dataset, this marsh was developing signs of excessive inundation stress in terms of vegetation coverage and soil geochemistry. Therefore, we suggest that soil microbial community structures may be effective bioindicators of salt marsh inundation and are worthy of further targeted investigation.

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Cultivation and characterization of a novel clade of deep-sea Chloroflexi: providing a glimpse of the phylum Chloroflexi involved in sulfur cycling

Cited by 2 publications

References 70 publications

Microbial Community Succession Along a Chronosequence in Constructed Salt Marsh Soils

Microbial Community Succession Along a Chronosequence in Constructed Salt Marsh Soils

Microbial community succession along a chronosequence in constructed salt marsh soils

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