Anammox, denitrification and fixed-nitrogen removal in sediments from the Lower St. Lawrence Estuary

Crowe, Sean A.; Canfield, Donald E.; Mucci, Alfonso; Sundby, Bjørn; Maranger, Roxane

doi:10.5194/bg-9-4309-2012

Cited by 70 publications

(41 citation statements)

References 61 publications

(92 reference statements)

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“…Paddy soil therefore represents a large area of artificial wetlands under the frequent waterlog management and has being received high level of nitrogen fertilizer input, and the pathways of nitrogen loss from paddy soil have received great concerns due to its negative environmental influence (Zhu and Chen 2002). Although denitrification has been identified as a main soil nitrogen loss pathway under anoxic conditions (Risgaard-Petersen et al 2005;Long et al 2013), previous studies have indicated that the anammox process in either marine, freshwater, or terrestrial agriculture ecosystems cannot be ignored (Risgaard-Petersen et al 2005;Crowe et al 2012;Long et al 2013). In a recent study in a paddy soil that received high slurry manure input, anammox was suggested to be responsible for 4-37 % of N 2 production, and Candidatus Brocadia was mainly detected in deep profile soils while Candidatus Anammoxoglobus, Candidatus Jettenia, and Candidatus Kuenenia were discovered in surface soil (Zhu et al 2011).…”

Section: Responsible Editor: Yanfen Wangmentioning

confidence: 99%

“…Anaerobic ammonium-oxidizing (anammox) bacteria just have been known more recently since they were firstly found being responsible for the N 2 loss from wastewater bioreactor by mediating the anaerobic oxidation of ammonia coupled nitrate reduction (Mulder et al 1995). Later on, anammox bacteria were detected widely in natural ecosystems like marine sediments, oxygen minimum zones, and fresh water habitats (Dong et al 2009;Lam et al 2009;Crowe et al 2012) and were suggested potentially responsible for the 50 % of nitrogen loss in South Atlantic midwaters . Understanding of the biodiversity and…”

Section: Introductionmentioning

confidence: 99%

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Candidatus Brocadia and Candidatus Kuenenia predominated in anammox bacterial community in selected Chinese paddy soils

Bai

Chen

et al. 2015

J Soils Sediments

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Purpose Anammox bacteria have been widely investigated in both natural aquatic habitats and wastewater treatment reactors. However, their distribution in agricultural ecosystems which receive high reactive nitrogen input is hardly known. This study aims to examine the distribution and diversity of anammox bacteria in different Chinese paddy soils and along soil profile horizons. Materials and methods DNA was extracted from paddy soils which were collected from ten sites and along four soil depth horizons (0-20, 20-40, 40-60, 60-80 cm). Community structure and diversity of the anammox bacteria were analyzed using cloning and sequencing methods by targeting 16S ribosomal RNA (rRNA) genes. Quantitative PCR was conducted to study the abundance of anammox hzsB genes. Results and discussion Anammox bacterial 16S rRNA genes were not detected in most of the surface soil profile layers but present in all subsurface and deep horizons. Two genera, Candidatus Brocadia and Candidatus Kuenenia, were the only groups detected, and the former was predominant in tested soils. A site-specific distribution pattern of anammox bacteria and significant relationship between anammox bacteria community composition and soil pH and ammonium concentration were observed. The abundance of anammox bacteria hzsB gene ranged from 3.78×10 4 to 1.64×10 7 per gram of dry soil in all soils and significantly varied along the soil profile horizons. Conclusions Anammox bacteria were widely distributed in paddy soils, especially in subsurface and profile depth horizons. Candidatus Brocadia and Candidatus Kuenenia were the dominating anammox groups in the tested soils, and the two genera showed a site-specific distribution pattern across large Chinese paddy soil areas and along soil depth profiles.

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Section: Responsible Editor: Yanfen Wangmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Candidatus Brocadia and Candidatus Kuenenia predominated in anammox bacterial community in selected Chinese paddy soils

Bai

Chen

et al. 2015

J Soils Sediments

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“…Of the nitrate reduction processes, only denitrification and anaerobic ammonium oxidation (anammox) can remove bioavailable nitrogen permanently from estuarine ecosystems in the form of dinitrogen gas. Although the above two processes are the major nitrate reduction pathways removing approximately 30% to 60% of total anthropogenic reactive nitrogen in estuarine and coastal regions [Dong et al, 2009;Crowe et al, 2012;Fernandes et al, 2012;Hou et al, 2013;Gomez-Velez et al, 2015], dissimilatory nitrate reduction to ammonium (DNRA) is also a competing nitrate reduction process converting nitrate into ammonium [Giblin et al, 2013;Cheng et al, 2016;Robertson et al, 2016;Shan et al, 2016]. Therefore, DNRA plays a different role from denitrification and anammox by retaining nitrogen as a more bioavailable form in aquatic ecosystems, further contributing to eutrophication [Deng et al, 2015;Murphy et al, 2016;Yin et al, 2016].…”

Section: Introductionmentioning

confidence: 99%

DNRA in intertidal sediments of the Yangtze Estuary

et al. 2017

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Dissimilatory nitrate reduction to ammonium (DNRA) plays an important role in regulating the fate of reactive nitrogen in estuarine and coastal ecosystems. In this work, intertidal sediments of the Yangtze Estuary were collected in January and August 2015. Potential rates of DNRA and associated functional gene were investigated with nitrogen isotope‐tracing and molecular techniques. The measured DNRA rates ranged from 0.14 to 5.57 μmol 15N kg−1 h−1 in the intertidal sediments. DNRA rates were tightly related to abundance of nrfA gene (p < 0.001), demonstrating that fermentation reaction may be the dominant pathway of DNRA in the study area. Redundancy analysis (RDA) showed a relationship between DNRA and organic matter and NO2−, suggesting that these substrates stimulated the metabolism of DNRA microorganisms. On the other hand, the correlation between abundances of nrfA gene and Fe2+ and sulfide in the RDA analysis implied that oxidation of both Fe2+ and sulfide can enhance fermentative DNRA by providing extra free energy. DNRA converted approximately 2.29 × 105 t of nitrate to ammonia annually in the sampling area of the Yangtze Estuary, and most of the converted ammonium was retained in the estuarine ecosystem. DNRA may further contribute to eutrophication in the Yangtze Estuary and also in the other hypereutrophic estuaries.

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“…Anammox may account for 30-50% of the total N 2 removal from the ocean nitrogen budget [Devol, 2003;Engström et al, 2009;Glud et al, 2009;Kuypers et al, 2005]. Although typically low, potential anammox rates within coastal sediments have been reported between 0 and 52 μmol N m À2 h À1 [Brin et al, 2014;Crowe et al, 2012;Dalsgaard et al, 2005;Meyer et al, 2005]. The NH 4 + for the anammox reaction is supplied by various respiratory and/or dissimilatory pathways such as aerobic respiration, sulfate reduction, and DNRA [An and Gardner, 2002;Brandes et al, 2007].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen reduction pathways in estuarine sediments: Influences of organic carbon and sulfide

2015

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Potential rates of sediment denitrification, anaerobic ammonium oxidation (anammox), and dissimilatory nitrate reduction to ammonium (DNRA) were mapped across the entire Niantic River Estuary, CT, USA, at 100–200 m scale resolution consisting of 60 stations. On the estuary scale, denitrification accounted for ~ 90% of the nitrogen reduction, followed by DNRA and anammox. However, the relative importance of these reactions to each other was not evenly distributed through the estuary. A Nitrogen Retention Index (NIRI) was calculated from the rate data (DNRA/(denitrification + anammox)) as a metric to assess the relative amounts of reactive nitrogen being recycled versus retained in the sediments following reduction. The distribution of rates and accompanying sediment geochemical analytes suggested variable controls on specific reactions, and on the NIRI, depending on position in the estuary and that these controls were linked to organic carbon abundance, organic carbon source, and pore water sulfide concentration. The relationship between NIRI and organic carbon abundance was dependent on organic carbon source. Sulfide proved the single best predictor of NIRI, accounting for 44% of its observed variance throughout the whole estuary. We suggest that as a single metric, sulfide may have utility as a proxy for gauging the distribution of denitrification, anammox, and DNRA.

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Anammox, denitrification and fixed-nitrogen removal in sediments from the Lower St. Lawrence Estuary

Cited by 70 publications

References 61 publications

Candidatus Brocadia and Candidatus Kuenenia predominated in anammox bacterial community in selected Chinese paddy soils

Candidatus Brocadia and Candidatus Kuenenia predominated in anammox bacterial community in selected Chinese paddy soils

DNRA in intertidal sediments of the Yangtze Estuary

Nitrogen reduction pathways in estuarine sediments: Influences of organic carbon and sulfide

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