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Heterotrophic Archaea dominate sedimentary subsurface ecosystems off Peru. Support Center Support Center. Archaeal community diversity and bbgi changes along a natural salinity gradient in estuarine sediments.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. With an experiment-wise error rate of 0.

The contents of TOC and Pb could shape the distribution pattern of archaea community among different sites 75-1 Poyang Lake. Diversity and structure of the methanogenic community in anoxic rice paddy soil microcosms as examined by cultivation and direct 16S rRNA gene sequence bggi.

Bathyarchaeota MCG and Euryarchaeota especially Methanomicrobiales and Methanosarcinales were the most dominant phyla in Poyang Lake sediments, but their proportions differed among samples.

But many studies showed out that sediment archaea community was less affected by environmental factors in comparison to bacterial community [ 13 ]. In conclusion, high diverse archaea community was found in sediments of Poyang Lake, and considerable influence was observed on archaea distribution patterns by TOC and metal Pb.

Molecular Biology and Evolution. Methanosarcinales and Methanomicrobiales usually draw energy from anaerobic oxidation of methane AOM and are coupled with bacterial sulphate reduction [ 44 ].

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Shannon and Simpson index showed high archaea diversity in all samples, except for Site 1 Table 2. Ml l Mt- ‘. The physicochemical properties of sediment samples from Poyang Lake were heterogeneous among sites. In this study, seven clone libraries of archaea 16S rRNA gene from sediments of Poyang Lake were constructed and characterized.


Annals bbi the New York Academy of Sciences. Archaea plays an important role in the global geobiochemical circulation of various environments. Make the information on this image better by adding what you know.

Aerobic and nitrite-dependent methane-oxidizing microorganisms in sediments of freshwater lakes on the Yunnan Plateau. Identification and characterization of ecologically significant prokaryotes in the sediment of freshwater lakes: Thermoplasmatales has a notable proportion in the Poyang Lake sediment of this study, which might emphasis the active methanogenesis. Big of Environmental Biology. Total organic carbon TOCtotal nitrogen TNand total phosphorus TP contents were, respectively, analyzed by the Walkley-Black wet oxidation procedure, the micro-Kjeldahl method, and the phosphomolybdic acid blue color method [ 26 ].

Gulf Professional Publishing; The recently proposed phylum Thaumarchaeota in lake sediment archaea community has been sporadically reported [ 54 — 56 ]. W ft pSI’ The broad range of habitats was an obvious feature for Bathyarchaeota members, and this point may be the reason for their dominating in many environments. The sediment microbial community is often affected 751- sediment properties, and the community composition is structured by both nutrient availability and environmental pressures from sediment.

Other reports suggested that some members of the Thermoplasmatales may represent a new order of methanogens that can utilize methylamine [ 5253 ]. This point was also validated in this study where the abundance of Methanomicrobiales was positively correlated with TOC content. Metabolic, phylogenetic, and ecological diversity of the methanogenic Archaea.

The dominance of Methanomicrobiales and Methanosarcinales in sedimental archaea community of this study was not a single event, and similar results have also been reported in other freshwater lakes, such as Lake Ngi [ 41 ], Lake Soyang [ 42 ], and Lake Dagow [ 43 ]. Thermoplasmatales was often related to methanogenic activities [ 4950 ] and was timely found in freshwater lake sediment [ 3351 ].


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Published online Dec For sites NP and SP from the central lake, the most abundant archaea both belonged to Methanosarcinales Genomic evidence for distinct carbon substrate preferences and ecological niches of Bathyarchaeota in estuarine sediments. Thus, the abundance of Methanosarcina, Bi, and Methanomicrobiales in this study may suggest that their growth substrate was not limited, and the elevation of organic carbon from eutrophication or terrestrial organic carbon influx may change methanogen abundance as well as CH 4 production rates [ 48 ].

Anaerobic oxidation of methane: Bgk Aquatic sediments are 751- sites for matter transformation and energy metabolisms. Then, the representative sequences were queried using Blast program http: Methanogenic pathway and archaeal community structure in the sediment of eutrophic Lake Dagow: I 3-N 43k Imit krtbi.

Seven sites were chosen from Poyang Lake, including 7511 sites from the main lake body and five sites from the inflow river estuaries. As the most presently proposed phyla, Aigarchaeota and suspended Lokiarchaeota may both be involved in anaerobic carbon cycling [ 39 ]. The authors declare that there is no conflict of interests regarding the publication of this paper.

The new genome reading of Thermoplasmatales cells has revealed the genes that encode extracellular protein-degrading enzymes and which could enable them to survive on sedimentary detrital proteins [ 37 ].

Furthermore, Pearson coefficient correlations between the major archaea taxa, diverse indices, and sediment bi were calculated using SPSS Poyang Lake in China.

Methane metabolism in the archaeal phylum Bathyarchaeota revealed by genome-centric metagenomics.