Results 41 to 50 of about 7,635 (199)

Unifying the global phylogeny and environmental distribution of ammonia-oxidising archaea based on amoA genes [PDF]

open access: yesNature Communications, 2018
AbstractAmmonia-oxidising archaea (AOA) are ubiquitous and abundant in nature and play a major role in nitrogen cycling. AOA have been studied intensively based on the amoA gene (encoding ammonia monooxygenase subunit A), making it the most sequenced functional marker gene.
Ricardo J. Eloy Alves   +4 more
openaire   +5 more sources

Correlating microbial community profiles with geochemical data in highly stratified sediments from the Arctic Mid-Ocean Ridge [PDF]

open access: yes, 2012
Microbial communities and their associated metabolic activity in marine sediments have a profound impact on global biogeochemical cycles. Their composition and structure are attributed to geochemical and physical factors, but finding direct correlations ...
Baumberger, Tamara   +10 more
core   +1 more source

Effects of macrobenthic bioturbation on the abundance and community composition of ammonia-oxidizing prokaryotes under different temperatures

open access: yesJournal of Freshwater Ecology, 2017
In order to investigate the effects of macrobenthos on the abundance and community composition of ammonia-oxidizing prokaryotes under different temperature conditions, laboratory microcosms containing two kinds of macrobenthos (Corbicula fluminea and ...
Dayong Zhao   +4 more
doaj   +1 more source

Nitrogen removal and ammonia-oxidising bacteria in a vertical flow constructed wetland treating inorganic wastewater [PDF]

open access: yes, 2011
Nitrogen removal performance and the ammonia-oxidising bacterial (AOB) community were assessed in the batch loaded 1.3ha saturated surface vertical flow wetland at CSBP Ltd, a fertiliser and chemical manufacturer located in Kwinana, Western Australia ...
Dallas, S.   +4 more
core   +2 more sources

Relationships between soil physicochemical properties and nitrogen fixing, nitrifying and denitrifying under varying land-use practices in the northwest region of Argentina [PDF]

open access: yes, 2018
The aim of this study was to evaluate the response pattern of diazotrophic microbes, denitrifiers and nitrifiers to different types of land use management, such as soybean monoculture (M) during 5 and 24 years (M5 and M24) and soybean-maize rotation (R ...
Huidobro, Jorgelina   +5 more
core   +1 more source

Response of the abundance of key soil microbial nitrogen-cycling genes to multi-factorial global changes. [PDF]

open access: yesPLoS ONE, 2013
Multiple co-occurring environmental changes are affecting soil nitrogen cycling processes, which are mainly mediated by microbes. While it is likely that various nitrogen-cycling functional groups will respond differently to such environmental changes ...
Ximei Zhang   +8 more
doaj   +1 more source

Occurrence and abundance of ammonia‐oxidizing archaea and bacteria from the surface to below the water table, in deep soil, and their contributions to nitrification

open access: yesMicrobiologyOpen, 2017
Using molecular biology methods (qualitative and quantitative PCR), we determined the occurrence and abundance of ammonia‐oxidizing archaea (AOA) and ammonia‐oxidizing bacteria (AOB) from a dry inland soil in Basel, Switzerland, and from the riparian ...
Lei Zheng   +5 more
doaj   +1 more source

Diversity and Abundance of Ammonia-Oxidizing Bacteria and Archaea in a Freshwater Recirculating Aquaculture System

open access: yesHayati Journal of Biosciences, 2017
The role of ammonia-oxidizing bacteria and archaea was evaluated using amoA gene in a freshwater recirculating system. Broken earthen pot pieces (BEP) were used as filter bed material.
Cherita Devi Khangembam   +2 more
doaj   +1 more source

Responses of Alpine Soil Nitrification and Denitrification Rates to Nitrogen Addition Gradient—The Role of Functional Genes

open access: yesAgriculture, 2023
Increases in nitrogen (N) deposition affect the nitrification and denitrification processes that are regulated by microorganisms. With the aim of understanding what happened to the soil nitrification and denitrification rates under the N application ...
Jiaqi Zhang, Yinghui Liu, Jingyi Dong
doaj   +1 more source

Global biodiversity of aquatic ammonia-oxidizing archaea is partitioned by habitat

open access: yesFrontiers in Microbiology, 2012
Archaea play an important role in nitrification and are, thus, inextricably linked to the global carbon and nitrogen cycles. Since the initial discovery of an ammonia monooxygenase α-subunit (amoA) gene associated with an archaeal metagenomic fragment ...
Steven J Biller   +6 more
doaj   +1 more source

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