The Family Desulfohalobiaceae

Kuever, Jan

doi:10.1007/978-3-642-39044-9_311

Cited by 9 publications

(6 citation statements)

References 19 publications

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“…S9a, S10). The gene mpnS is widely distributed in the marine environment [56], consistent with its presence in reference and restored sites that have recently exchanged water with the San Francisco Bay. Isolation and concentration of seawater solutes in salt making apparently lead to depletion of inorganic phosphate and conditions favoring methylphosphonate degradation as opposed to synthesis.…”

Section: Discussionsupporting

confidence: 55%

“…Indicator taxa in the unrestored salt ponds were largely halophiles, including Rhodobacteraceae, Alteromonadaceae, Balneolaceae, Halanaerobiaceae and Desulfohalobiaceae (Fig. S2a) [56][57][58][59]. The restored salt pond included more sulfate-reducers among its indicator species including Desulfobacteraceae, Desulfobulbaceae and Syntrophobacteraceae [60][61][62].…”

Section: Microbial Community Composition (16s Rrna Gene)mentioning

confidence: 99%

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Microbial drivers of methane emissions from unrestored industrial salt ponds

et al. 2021

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Wetlands are important carbon (C) sinks, yet many have been destroyed and converted to other uses over the past few centuries, including industrial salt making. A renewed focus on wetland ecosystem services (e.g., flood control, and habitat) has resulted in numerous restoration efforts whose effect on microbial communities is largely unexplored. We investigated the impact of restoration on microbial community composition, metabolic functional potential, and methane flux by analyzing sediment cores from two unrestored former industrial salt ponds, a restored former industrial salt pond, and a reference wetland. We observed elevated methane emissions from unrestored salt ponds compared to the restored and reference wetlands, which was positively correlated with salinity and sulfate across all samples. 16S rRNA gene amplicon and shotgun metagenomic data revealed that the restored salt pond harbored communities more phylogenetically and functionally similar to the reference wetland than to unrestored ponds. Archaeal methanogenesis genes were positively correlated with methane flux, as were genes encoding enzymes for bacterial methylphosphonate degradation, suggesting methane is generated both from bacterial methylphosphonate degradation and archaeal methanogenesis in these sites. These observations demonstrate that restoration effectively converted industrial salt pond microbial communities back to compositions more similar to reference wetlands and lowered salinities, sulfate concentrations, and methane emissions.

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Section: Discussionsupporting

confidence: 55%

Section: Microbial Community Composition (16s Rrna Gene)mentioning

confidence: 99%

Microbial drivers of methane emissions from unrestored industrial salt ponds

et al. 2021

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“…This indicates that the reductive acetyl-CoA pathway (WL pathway) is a primary carbon fixation channel in the GSL sediments. Recognized sulfate reducers Desulfobacteraceae and Desulfohalobiaceae in the GSL ecosystem ( Brandt and Ingvorsen, 1997 ; Jakobsen et al, 2006 ; Kuever, 2014a , b ) were identified with genes required for dissimilatory sulfate reduction as well as the WL pathway ( Figure 5B ). This suggests that Desulfobacteraceae and Desulfohalobiaceae function via coupled exergonic sulfate reduction and endergonic acetate oxidation (reverse WL pathway), as reported before ( Schauder et al, 1988 ; Spormann and Thauer, 1988 ; Ferry, 1992 ).…”

Section: Discussionmentioning

confidence: 99%

Viruses and Their Interactions With Bacteria and Archaea of Hypersaline Great Salt Lake

et al. 2021

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Viruses play vital biogeochemical and ecological roles by (a) expressing auxiliary metabolic genes during infection, (b) enhancing the lateral transfer of host genes, and (c) inducing host mortality. Even in harsh and extreme environments, viruses are major players in carbon and nutrient recycling from organic matter. However, there is much that we do not yet understand about viruses and the processes mediated by them in the extreme environments such as hypersaline habitats. The Great Salt Lake (GSL) in Utah, United States is a hypersaline ecosystem where the biogeochemical role of viruses is poorly understood. This study elucidates the diversity of viruses and describes virus–host interactions in GSL sediments along a salinity gradient. The GSL sediment virosphere consisted of Haloviruses (32.07 ± 19.33%) and members of families Siphoviridae (39.12 ± 19.8%), Myoviridae (13.7 ± 6.6%), and Podoviridae (5.43 ± 0.64%). Our results demonstrate that salinity alongside the concentration of organic carbon and inorganic nutrients (nitrogen and phosphorus) governs the viral, bacteria, and archaeal diversity in this habitat. Computational host predictions for the GSL viruses revealed a wide host range with a dominance of viruses that infect Proteobacteria, Actinobacteria, and Firmicutes. Identification of auxiliary metabolic genes for photosynthesis (psbA), carbon fixation (rbcL, cbbL), formaldehyde assimilation (SHMT), and nitric oxide reduction (NorQ) shed light on the roles played by GSL viruses in biogeochemical cycles of global relevance.

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“…Table 3 shows the number of OTUs of typical SRB possibly producing metal sulfide precipitation in the CWs. Five families of SRB were found only in the CW-B soil sample: Desulfovibrionaceae [25], Syntrophaceae (Desulfomonile [26]), Desulfarculaceae [27], Desulfobacteraceae [28], and Desulfobulbaceae [28] in the class Deltaproteobacteria. Bacteria of the family Thermodesulfovibrionaceae [29] in the phylum Nitrospirae were found in all samples except for the CW-A soil sample.…”

Section: Bacterial Communitiesmentioning

confidence: 99%

Effects of Cattails and Hydraulic Loading on Heavy Metal Removal from Closed Mine Drainage by Pilot-Scale Constructed Wetlands

Nguyen

Soda

Kanayama

et al. 2021

Water

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This study demonstrated heavy metal removal from neutral mine drainage of a closed mine in Kyoto prefecture in pilot-scale constructed wetlands (CWs). The CWs filled with loamy soil and limestone were unplanted or planted with cattails. The hydraulic retention time (HRT) in the CWs was shortened gradually from 3.8 days to 1.2 days during 3.5 months of operation. A short HRT of 1.2 days in the CWs was sufficient to achieve the effluent standard for Cd (0.03 mg/L). The unplanted and the cattail-planted CWs reduced the average concentrations of Cd from 0.031 to 0.01 and 0.005 mg/L, Zn from 0.52 to 0.14 and 0.08 mg/L, Cu from 0.07 to 0.04 and 0.03 mg/L, and As from 0.011 to 0.006 and 0.006 mg/L, respectively. Heavy metals were removed mainly by adsorption to the soil in both CWs. The biological concentration factors in cattails were over 2 for Cd, Zn, and Cu. The translocation factors of cattails for all metals were 0.5–0.81. Sulfate-reducing bacteria (SRB) belonging to Deltaproteobacteria were detected only from soil in the planted CW. Although cattails were a minor sink, the plants contributed to metal removal by rhizofiltration and incubation of SRB, possibly producing sulfide precipitates in the rhizosphere.

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The Family Desulfohalobiaceae

Cited by 9 publications

References 19 publications

Microbial drivers of methane emissions from unrestored industrial salt ponds

Microbial drivers of methane emissions from unrestored industrial salt ponds

Viruses and Their Interactions With Bacteria and Archaea of Hypersaline Great Salt Lake

Effects of Cattails and Hydraulic Loading on Heavy Metal Removal from Closed Mine Drainage by Pilot-Scale Constructed Wetlands

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