The Family Beggiatoaceae

Teske, Andreas; Salman, Verena

doi:10.1007/978-3-642-38922-1_290

Cited by 34 publications

(33 citation statements)

References 208 publications

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“…Gallardo et al (1995) surveyed the HS macrobenthic biota, including the megabacteria Candidatus Marithioploca spp. (ex-Thioploca, see Teske & Salman 2014). This study found that the former's response to the seasonal and depth variations in dissolved oxygen are in tune with those shown in this study by Actinobacteria but not with respect to the behavior of the megabacteria Candidatus Marithioploca spp.…”

Section: Community Structure Of the Hs Actinobacteriasupporting

confidence: 45%

Molecular taxonomy and community dynamics of Actinobacteria in marine sediments off central Chile

Musleh

Gomez‐Uchida

Espinoza

et al. 2016

Rev. biol. mar. oceanogr.

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Resumen.-Se usó pirosecuenciación de la región V6 del gen 16S del ARNr para caracterizar la diversidad y la dinámica espaciotemporal de unidades taxonómicas operacionales (OTUs) del filo Actinobacteria, los que fueron aislados desde sedimentos provenientes del Sulfureto de Humboldt frente a Chile central. Este substrato es rico en compuestos azufrados y material orgánico lo que mantiene una vasta comunidad microbiana que experimenta cambios estacionales en respuesta a regímenes oceanográficos contrastantes. Se identificaron 498 OTUs distribuidas en 7 órdenes, 47 familias, 122 géneros, (5 de los cuales son ampliamente reconocidos por sus aplicaciones biotecnológicas), y 56 especies. El análisis temporal reveló que algunos OTUs presentan diferencias significativas en abundancia, índices de diversidad y riqueza, las que generaron una agrupación de las muestras asociada a la fecha de muestreo (estación del año) y no a la profundidad del sitio de muestreo. Debido a que las Actinobacteria son mayormente aeróbicas, las altas concentraciones de oxígeno disuelto que ocurren en la zona en el otoño-invierno austral, representan condiciones ambientales beneficiosas para este filo, no así las de primavera-verano austral cuando prevalece la hipoxia. El presente trabajo se benefició de la aplicación de métodos cultivo-independientes (métodos moleculares) para evaluar la diversidad taxonómica y examinar la dinámica de uno de los grupos de bacterias presentes en el Sulfureto de Humboldt reportado como una fuente potencial e inexplorada de metabolitos secundarios. Palabras clave: Actinobacteria, Sulfureto de Humboldt, ecología bacterianaAbstract.-We used amplicon sequencing of the 16S rRNA gene to characterize the diversity and assess temporal and spatial patterns of Actinobacteria operational taxonomic units (OTUs) extracted from sediments of the Humboldt Sulfuretum located off the coast of central Chile. The sediment of this zone is rich in sulfur compounds and organic material and supports a vast microbial community that experiences seasonal changes in response to contrasting oceanographic regimes. We distinguished 498 OTUs distributed among 7 orders, 47 families, and 122 genera (5 of these have been widely recognized for their biotechnological applications), and 56 species. The temporal analyses indicated that some OTUs underwent significant temporal changes in abundance, richness, and diversity that allowed samples to be grouped by sampling dates (seasons) but not by sampling depth or location. Since Actinobacteria are mostly aerobic, higher concentrations of dissolved oxygen near the bottom during the austral autumn-winter seasons result in a more benign environment for this phylum than the upwelling-favorable spring-summer seasons when waters over the shelf are oxygen-deficient. To evaluate the taxonomic diversity and inquire into the community dynamic of Actinobacteria present in the Humboldt Sulfuretum and reported as a potentially untapped source for secondary metabolites this work benefited from culture-independent (mo...

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Section: Community Structure Of the Hs Actinobacteriasupporting

confidence: 45%

Molecular taxonomy and community dynamics of Actinobacteria in marine sediments off central Chile

Musleh

Gomez‐Uchida

Espinoza

et al. 2016

Rev. biol. mar. oceanogr.

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“…Within the complex bacterial community, the largest clone groups consist of members of sulfate-reducing and sulfur-oxidizing lineages within the Proteobacteria ( Figure 7 ). Epsilonproteobacterial clones related to the sulfur-oxidizing genera Arcobacter and Sulfurimonas , and a clone within the nitrate-reducing, sulfur-oxidizing Beggiatoaceae (Candidatus Group Maribeggiatoa, Teske and Salman, 2014 ) indicate the presence of sulfur-oxidizing bacterial populations. Other bacterial clones included six within the Chloroflexi , four within the Caldithrix lineage, and one to two clones each within fourteen other deeply branching, phylogenetic lineages (Supplementary Figure S5 ), including those that contain cultured anaerobic thermophiles ( Deferribacteres , Caldithrix , Thermotoga , Caldiserica /OP5).…”

Section: Resultsmentioning

confidence: 99%

Microbial Communities in Methane- and Short Chain Alkane-Rich Hydrothermal Sediments of Guaymas Basin

et al. 2016

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The hydrothermal sediments of Guaymas Basin, an active spreading center in the Gulf of California (Mexico), are rich in porewater methane, short-chain alkanes, sulfate and sulfide, and provide a model system to explore habitat preferences of microorganisms, including sulfate-dependent, methane- and short chain alkane-oxidizing microbial communities. In this study, hot sediments (above 60°C) covered with sulfur-oxidizing microbial mats surrounding a hydrothermal mound (termed “Mat Mound”) were characterized by porewater geochemistry of methane, C2–C6 short-chain alkanes, sulfate, sulfide, sulfate reduction rate measurements, in situ temperature gradients, bacterial and archaeal 16S rRNA gene clone libraries and V6 tag pyrosequencing. The most abundantly detected groups in the Mat mound sediments include anaerobic methane-oxidizing archaea of the ANME-1 lineage and its sister clade ANME-1Guaymas, the uncultured bacterial groups SEEP-SRB2 within the Deltaproteobacteria and the separately branching HotSeep-1 Group; these uncultured bacteria are candidates for sulfate-reducing alkane oxidation and for sulfate-reducing syntrophy with ANME archaea. The archaeal dataset indicates distinct habitat preferences for ANME-1, ANME-1-Guaymas, and ANME-2 archaea in Guaymas Basin hydrothermal sediments. The bacterial groups SEEP-SRB2 and HotSeep-1 co-occur with ANME-1 and ANME-1Guaymas in hydrothermally active sediments underneath microbial mats in Guaymas Basin. We propose the working hypothesis that this mixed bacterial and archaeal community catalyzes the oxidation of both methane and short-chain alkanes, and constitutes a microbial community signature that is characteristic for hydrothermal and/or cold seep sediments containing both substrates.

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“…The morphologically conspicuous, large sulfur bacteria (LSB) of the gammaproteobacterial family Beggiatoaceae have been model organisms for benthic sulfur oxidation for decades. This family comprises several, morphologically distinct genera with diverse ecological strategies that reflect adaptations to the physicochemical characteristics of a wide spectrum of marine surface sediments (Teske and Salman, ). The molecular and morphological characteristics of Beggiatoaceae have recently been integrated in a revised taxonomic framework (Salman et al ., ).…”

Section: Sulfur Oxidationmentioning

confidence: 99%

The life sulfuric: microbial ecology of sulfur cycling in marine sediments

Wasmund

Mußmann

Loy

2017

Environ Microbiol Rep

299

266

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SummaryAlmost the entire seafloor is covered with sediments that can be more than 10 000 m thick and represent a vast microbial ecosystem that is a major component of Earth's element and energy cycles. Notably, a significant proportion of microbial life in marine sediments can exploit energy conserved during transformations of sulfur compounds among different redox states. Sulfur cycling, which is primarily driven by sulfate reduction, is tightly interwoven with other important element cycles (carbon, nitrogen, iron, manganese) and therefore has profound implications for both cellular‐ and ecosystem‐level processes. Sulfur‐transforming microorganisms have evolved diverse genetic, metabolic, and in some cases, peculiar phenotypic features to fill an array of ecological niches in marine sediments. Here, we review recent and selected findings on the microbial guilds that are involved in the transformation of different sulfur compounds in marine sediments and emphasise how these are interlinked and have a major influence on ecology and biogeochemistry in the seafloor. Extraordinary discoveries have increased our knowledge on microbial sulfur cycling, mainly in sulfate‐rich surface sediments, yet many questions remain regarding how sulfur redox processes may sustain the deep‐subsurface biosphere and the impact of organic sulfur compounds on the marine sulfur cycle.

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The Family Beggiatoaceae

Cited by 34 publications

References 208 publications

Molecular taxonomy and community dynamics of Actinobacteria in marine sediments off central Chile

Molecular taxonomy and community dynamics of Actinobacteria in marine sediments off central Chile

Microbial Communities in Methane- and Short Chain Alkane-Rich Hydrothermal Sediments of Guaymas Basin

The life sulfuric: microbial ecology of sulfur cycling in marine sediments

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