Anaerobic ammonium oxidation (anammox) in the marine environment

Dalsgaard, Tage; Thamdrup, Bo; Canfield, Donald E.

doi:10.1016/j.resmic.2005.01.011

Cited by 538 publications

(358 citation statements)

References 33 publications

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“…Under anoxic conditions, nitrate could be reduced by denitrifiers or other microbial species, thus promoting the dissimilatory nitrate reduction to ammonium (DNRA) (Dalsgaard et al, 2005). Some DNRA bacteria could also reduce nitrite to ammonium.…”

Section: Nitrogen Removal Process In a Typical Operating Cyclementioning

confidence: 99%

Performance and microbial community of simultaneous anammox and denitrification (SAD) process in a sequencing batch reactor

Qiang

et al. 2016

Bioresource Technology

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h i g h l i g h t sSimultaneous nitrogen and carbon removal was achieved in the SAD process. Contributions of anammox and denitrification to nitrogen removal were determined. Anammox and denitrifying bacteria dominated at low and high CODs, respectively. Brocadia sinica could grow with organic matter and tolerate high NO 3 À concentrations.a r t i c l e i n f o exhibited good diversity and abundance, but the diversity of anammox bacteria was less abundant. Brocadia sinica was able to grow in the presence of organic matter and tolerate high nitrite concentration. Anammox bacteria were predominant at low COD contents, while denitrifying bacteria dominated the microbial community at high COD contents. Anammox and denitrifying bacteria could coexist in one reactor to achieve the simultaneous carbon and nitrogen removal through the synergy of anammox and denitrification.

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Section: Nitrogen Removal Process In a Typical Operating Cyclementioning

confidence: 99%

Performance and microbial community of simultaneous anammox and denitrification (SAD) process in a sequencing batch reactor

Qiang

et al. 2016

Bioresource Technology

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“…Until recently, bacterial nitrification coupled with denitrification was considered the only process directing fixed nitrogen back to the atmosphere as N 2 . Today it seems that, in the ocean, anaerobic ammonium oxidation (anammox) could be as important as bacterial denitrification for N 2 formation (35,36). We can now supplement the enormous phylogenetic and metabolic biodiversity that is hidden in the microbial world with our identification of phylogenetically and geographically widespread nitratestoring and denitrifying foraminifers and gromiids.…”

Section: Nitrate-storing Foraminifers: Implications For the Marine Nimentioning

confidence: 99%

Widespread occurrence of nitrate storage and denitrification among Foraminifera andGromiida

Piña-Ochoa

Høgslund

Geslin

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

246

257

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Benthic foraminifers inhabit a wide range of aquatic environments including open marine, brackish, and freshwater environments. Here we show that several different and diverse foraminiferal groups (miliolids, rotaliids, textulariids) and Gromia , another taxon also belonging to Rhizaria, accumulate and respire nitrates through denitrification. The widespread occurrence among distantly related organisms suggests an ancient origin of the trait. The diverse metabolic capacity of these organisms, which enables them to respire with oxygen and nitrate and to sustain respiratory activity even when electron acceptors are absent from the environment, may be one of the reasons for their successful colonization of diverse marine sediment environments. The contribution of eukaryotes to the removal of fixed nitrogen by respiration may equal the importance of bacterial denitrification in ocean sediments.

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“…There are a variety of environmental conditions that might influence the sedimentological condition and thus the sedimentary bacterial assemblages, including the in situ hydrological regime, such as currents (Hamdan et al 2013), tides (Gobet et al 2012), upwelling (Kuypers et al 2005), lateral transport (Dalsgaard et al 2005), water mixing and exchange, and the intensity and dynamics of these activities (Dang et al 2008d(Dang et al , 2013. Certain geochemical background, such as sediment NH 3 , OrgC (Jorgensen et al 2012) and OrgN , mineral (Jorgensen et al 2012), salinity (Bolhuis and Stal 2011), and pH ; and many sedimentological factors, such as median grain size (Jackson and Weeks 2008) and the electrical conductivity, had also been identified as potentially the key regulators of the bacterial composition, community structure, abundance, and distribution in the marine sediment.…”

Section: Factors Shaping the Bacterial Community Structurementioning

confidence: 99%

Bacterial composition and spatiotemporal variation in sediments of Jiaozhou Bay, China

Liu

et al. 2014

J Soils Sediments

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Purpose Although coastal marine sediments harbor diverse bacteria with important ecological and environmental functions, a comprehensive view of their community characteristics is still lacking in typical environments along the China coast. We studied the diversity and composition of bacterial community in the sediment of Jiaozhou Bay and characterized their spatiotemporal patterns, aiming to analyze the effects of geographic heterogeneity, seasonal difference, anthropogenic activity, and eutrophication gradient on the bacterial ecology. Materials and methods Sixteen full-length bacterial 16S rRNA gene clone libraries were constructed from the sediment bacteria at four stations (A5, B2, D1, and D7) of Jiaozhou Bay over four seasons (February, May, August, and November). The bacterial diversity and community structure variation were analyzed. Results and discussion A total of 1088 16S rRNA gene sequences and 746 distinct operational taxonomic units (OTUs) (at 97 % sequence similarity level) were retrieved from the 16 clone libraries. Libraries of each sample revealed a high diversity, and a total of 17 bacterial phyla were identified.Bacteria lineages Proteobacteria (mostly γ-Proteobacteria and δ-Proteobacteria), Actinobacteria, Bacteroidetes, and Planctomycetes, which are commonly found in marine sediments, were the dominant divisions in our samples. Meanwhile, some uncommon phyla, such as Deinococcus-Thermus and Lentisphaerae, were also detected. Distinct spatial patterns and noticeable seasonal variations of bacteria community were observed, indicating that environmental heterogeneity in spatial variation other than in temporal variation may be more important in determining the bacterial communities. Most of the abundant OTUs were related to sequences retrieved from the heavy-metal-polluted environments, indicating that the Jiaozhou Bay might be influenced by pollution. Conclusions The bacterial communities in Jiaozhou Bay sediments are highly diverse. The four typical stations that we chose might experience different anthropogenic effects and eutrophication gradients, which shaped their bacterial community composition. The environment of Jiaozhou Bay may be under pressure exerted by multi-dimension anthropogenic activities. This study provided a novel insight into the bacterial community variations in Jiaozhou Bay, enriching knowledge about ecological bioindicators and mechanisms that maintain bacterial diversity and shape bacterial community composition.

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Anaerobic ammonium oxidation (anammox) in the marine environment

Cited by 538 publications

References 33 publications

Performance and microbial community of simultaneous anammox and denitrification (SAD) process in a sequencing batch reactor

Performance and microbial community of simultaneous anammox and denitrification (SAD) process in a sequencing batch reactor

Widespread occurrence of nitrate storage and denitrification among Foraminifera andGromiida

Bacterial composition and spatiotemporal variation in sediments of Jiaozhou Bay, China

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