Evidence map›Paper›PMID 25501888›Full record

ArticleMicrobial ecology2015

Microbial community composition and ultrastructure of granules from a full-scale anammox reactor.

Graciela Gonzalez-Gil, Rachid Sougrat, Ali R Behzad, Piet N L Lens, Pascal E Saikaly

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Article in Microbial ecology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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3 · Its place in the literature

Who cites it

25 citing papers in PubMed.

  1. Article
  2. Mechanisms of microbial co-aggregation in mixed anaerobic cultures.Applied microbiology and biotechnology · 2024
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  19. Genome of a Novel Bacterium "Frontiers in microbiology · 2019
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Graciela Gonzalez-GilWater Desalination and Reuse Center, Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia, g.gonzalezgil@unesco-ihe.org.
Rachid Sougrat
Ali R Behzad
Piet N L Lens
Pascal E Saikaly

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Granules in anammox reactors contain besides anammox bacteria other microbial communities whose identity and relationship with the anammox bacteria are not well understood. High calcium concentrations are often supplied to anammox reactors to obtain sufficient bacterial aggregation and biomass retention. The aim of this study was to provide the first characterization of bacterial and archaeal communities in anammox granules from a full-scale anammox reactor and to explore on the possible role of calcium in such aggregates. High magnification imaging using backscattered electrons revealed that anammox bacteria may be embedded in calcium phosphate precipitates. Pyrosequencing of 16S rRNA gene fragments showed, besides anammox bacteria (Brocadiacea, 32%), substantial numbers of heterotrophic bacteria Ignavibacteriacea (18%) and Anaerolinea (7%) along with heterotrophic denitrifiers Rhodocyclacea (9%), Comamonadacea (3%), and Shewanellacea (3%) in the granules. It is hypothesized that these bacteria may form a network in which heterotrophic denitrifiers cooperate to achieve a well-functioning denitrification system as they can utilize the nitrate intrinsically produced by the anammox reaction. This network may provide a niche for the proliferation of archaea. Hydrogenotrophic methananogens, which scavenge the key fermentation product H2, were the most abundant archaea detected. Cells resembling the polygon-shaped denitrifying methanotroph Candidatus Methylomirabilis oxyfera were observed by electron microscopy. It is hypothesized that the anammox process in a full-scale reactor triggers various reactions overall leading to efficient denitrification and a sink of carbon as biomass in anammox granules.

Indexed as

MicrobiotaAmmonium CompoundsArchaeaBacteria, AnaerobicBase SequenceBioreactorsCalcium PhosphatesMicroscopy, ElectronMolecular Sequence DataRNA, Ribosomal, 16SSequence Analysis, DNASpecies SpecificityWater PurificationAmmonium Compoundscalcium phosphateCalcium PhosphatesRNA, Ribosomal, 16S

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.