Competition between ammonia-oxidizing archaea and complete ammonia oxidizers from freshwater environments

Applied and Environmental Microbiology, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 13, 2024

Nitrification is a key process in the global nitrogen cycle. Aerobic ammonia oxidizers play central role cycle by performing first step of nitrification. Ammonia-oxidizing archaea (AOA) and complete (comammox) are dominant nitrifiers environments with low ammonium availability. While AOA have been studied for almost 20 years, comammox were only discovered 8 years ago. Until now, there has gap our understanding whether can co-exist or if one strain would be under ammonium-limiting conditions. Here, we present study characterizing competition between freshwater varying substrate concentrations. Our results will help elucidating niches two lakes.

Language: Английский

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Nitrification inhibitor chlorate and nitrogen substrates differentially affect comammox Nitrospira in a grassland soil

Frontiers in Microbiology, Journal Year: 2024, Volume and Issue: 15

Published: May 14, 2024

Through the combined use of two nitrification inhibitors, Dicyandiamide (DCD) and chlorate with nitrogen amendment, this study aimed to investigate contribution comammox

Language: Английский

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Core fungal species strengthen microbial cooperation in a food-waste composting process

Environmental Science and Ecotechnology, Journal Year: 2022, Volume and Issue: 12, P. 100190 - 100190

Published: May 29, 2022

In ecosystem engineering research, the contribution of microbial cooperation to function has been emphasized. Fungi are one predominant decomposers in composting, but thus far, less attention given fungal than bacterial cooperation. Therefore, network and cohesion analyses were combined reveal correlation between organic matter (OM) degradation ten composting piles. Positive cohesion, reflecting degree, was positively linked rate OM. From community perspective, core species (i.e.,

Language: Английский

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Nitrogen source influences the interactions of comammox bacteria with aerobic nitrifiers

Microbiology Spectrum, Journal Year: 2024, Volume and Issue: 12(5)

Published: March 21, 2024

While the co-existence of comammox

Language: Английский

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Journey of the swift nitrogen transformation: Unveiling comammox from discovery to deep understanding

Chemosphere, Journal Year: 2024, Volume and Issue: 358, P. 142093 - 142093

Published: April 26, 2024

Language: Английский

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Effects of nitrogen and carbon source addition on biomass and protein production by Rhodopseudomonas via the RSM-CCD approach

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: 319, P. 100438 - 100438

Published: May 31, 2024

Recycling biomass and generating value-added products, such as protein, from wastewater treatment using photosynthetic bacteria (PSB), represents a promising avenue for renewable resources. However, there are several crucial factors that can influence the efficiency of protein production in PSB. In this study, response surface methodology was employed to assess optimize effects carbon nitrogen sources on production, respectively. A three-factor central composite design (CCD) analysis revealed highest reaching 1.267 0.459 g/L, respectively, were achieved under optimal conditions 0.442% sodium acetate (X1), 0.577% bicarbonate (X2), 0.5105% fructose (X3). Another CCD focusing demonstrated corresponding 1.288 0.417 0.600% urea (X4), 0.679% ammonium sulfate (X5), 0.805% glutamate (X6). The experimental results predicted shown be very comparable, verifying predictability used models. This research provides basis developing green economic PSB process promoting widespread use recovery.

Language: Английский

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Comammox Nitrospira among dominant ammonia oxidizers within aquarium biofilter microbial communities

Applied and Environmental Microbiology, Journal Year: 2024, Volume and Issue: 90(7)

Published: July 24, 2024

ABSTRACT Nitrification by aquarium biofilters transforms ammonia waste (NH 3 /NH 4 + ) to less toxic nitrate (NO - via nitrite 2 ). Prior the discovery of complete ammonia-oxidizing (“comammox” or CMX) Nitrospira , previous research revealed that archaea (AOA) dominated over bacteria (AOB) in freshwater biofilters. Here, we profiled biofilter microbial communities and quantified abundance all three known oxidizers using 16S rRNA gene sequencing quantitative PCR (qPCR), respectively. Biofilter water samples were each collected from representative residential commercial saltwater aquaria. Distinct associated with Comammox amoA genes detected 38 (average CMX genes: 2.2 × 10 ± 1.5 copies/ng) dominant 30, whereas AOA present 35 1.1 2.7 only 7 them. The AOB at relatively low within 3.2 1 copies genes/ng DNA), except for highest concentration. For biofilters, differentially abundant, no comammox detected. Additional differential distributions, suggesting niche adaptation based on chemistry (e.g., ammonia, carbonate hardness, alkalinity). Network analysis demonstrated positive correlations between nitrifiers heterotrophs, metabolic ecological interactions These results demonstrate plays a previously overlooked, but important role home nitrification. IMPORTANCE is crucial process converts into harmful occurs found Our study currently groups aerobic oxidizers. findings reveal (comammox) high abundance, challenging our understanding We also highlight salinity. network significant among other community members, intricate communities. Overall, this expands nitrification emphasizes highlights value aquaria as microcosms studying nitrifier ecology.

Language: Английский

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Comammox rather than AOB dominated the efficient autotrophic nitrification-denitrification process in an extremely oxygen-limited environment

Water Research, Journal Year: 2024, Volume and Issue: 268, P. 122572 - 122572

Published: Oct. 2, 2024

Language: Английский

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Metagenome‐Assembled Genomes for Oligotrophic Nitrifiers From a Mountainous Gravelbed Floodplain

Environmental Microbiology, Journal Year: 2025, Volume and Issue: 27(3)

Published: March 1, 2025

ABSTRACT Riparian floodplains are important regions for biogeochemical cycling, including nitrogen. Here, we present MAGs from nitrifying microorganisms, ammonia‐oxidising archaea (AOA) and comammox bacteria Slate River (SR) floodplain sediments (Crested Butte, CO, US). Additionally, explore potential nitrite‐oxidising (NOB) the Nitrospirales . AOA diversity in SR is lower than observed other western US Nitrosotalea ‐like lineages such as genus TA‐20 dominant AOA. No (AOB) were recovered. Microorganisms Palsa‐1315 (clade B comammox) most abundant ammonia‐oxidizers sediments. Established NOB conspicuously absent; however, recovered uncultured of NS‐4 family ( ) Nitrospiraceae that propose putative NOB. Nitrite oxidation may be carried out by organisms sister to established Nitrospira based on genomic content clades. Nitrifier harbour genes using alternative sources ammonia, urea, cyanate, biuret, triuret nitriles. The therefore appears a low ammonia flux environment selects oligotrophic nitrifiers.

Language: Английский

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The vertical distribution and metabolic versatility of complete ammonia oxidizing communities in mangrove sediments

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121602 - 121602

Published: April 1, 2025

Language: Английский

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