BGI 751-1 PDF

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Journal of Environmental Biology. The Unclassified Archaea still represented 3. Thus, the abundance of Methanosarcina, Methanobacteriales, and Methanomicrobiales big 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 ].

This study provides primary profile of sediment archaea distribution in freshwater lakes and helps to deepen our understanding of lake sediment microbes. Afterwards, samples were divided into two halves. Standards Press of China; Chinese. For sites NP and SP from the central lake, the most abundant archaea both belonged to Methanosarcinales NI 35MI rft. The most similar sequences were extracted from the GeneBank database.

The objective of the present study is 7551-1 characterize the archaea community structure in sediments of Poyang Lake and estimate the influence of surface sediment properties on the spatial distribution of archaea community. The obtained raw sequences were analyzed using Bellerophon http: Seven sites were chosen from Poyang Lake, including two sites from the main lake body and five sites from the inflow river estuaries.

The conventional affiliation of some archaea groups was named after their environmental characteristics or finding orders and often scattered several different phylogenetic taxa identified by molecular evolution methods. Uncultured archaea in deep marine 7551-1 sediments: Open in a separate window.

Multi-scale phylogenetic heterogeneity of archaea, bacteria, methanogens and methanotrophs in lake sediments. Lake and River Ecosystems. N means the ratio of total organic carbon to nitrogen.

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The archaea community of NP and SP both from central lakes showed similar structures; the most abundant clones belonged to Methanosarcinales and Methanomicrobiales of Euryarchaeota. Consequently, the investigating of sediment archaea 7751-1 is vital to understand the metabolic processes in freshwater lake ecosystems [ 8 ].

Bacterial and archaeal assemblages in sediments of a large shallow freshwater lake, Lake Taihu, as revealed by denaturing gradient gel electrophoresis. N reflected the shortage of nitrogen in sediment and restricted the archaeal diversity. Genome Biology and Evolution. Biodiversity changes in the lakes of the Central Yangtze.

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Our study revealed spatial heterogeneity of archaea community in the sediment of Poyang Lake. Abundance and activity of methanotrophic bacteria in littoral and profundal sediments of Lake Constance Germany Applied and Environmental Microbiology. The recently proposed phylum Thaumarchaeota in lake sediment archaea community has been sporadically reported [ 54 — 56 ].

However, the hydrological conditions of Poyang Lake changed dramatically in recent years, and the overall water areas also decreased. Furthermore, Pearson coefficient correlations between the major archaea taxa, diverse indices, and sediment variables were calculated using SPSS This article has been cited by other articles in PMC.

As the third domain of life, archaea was once considered as significant habitant of extreme environments, but increasing evidence reveals their widespread presence in various nonextreme environments, including soil, ocean, and freshwaters [ 1 ].

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I SS ‘ 7i”. I 1 ILi51p15 S t. Phylogenetic analysis of the sediment archaea 16S rRNA gene libraries revealed high diversity in Poyang Lake, and the majority of archaea community belonged to common groups of river and lake sediments.

Analysis of the microbial community and geochemistry of a sediment core from Great Slave Lake, Canada. Tifrt i i-i T. But many studies showed out that sediment archaea community was less affected by environmental factors in comparison to bacterial community [ 13 ].

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The community structure of sediment archaea could be influenced by pollution [ 58 ], sediment depth [ 3453 ], and salinity [ 59 ].

Other components of archaea community were Woesearchaeota, Pacearchaeota, Thaumarchaeota, suspended Lokiarchaeota, Aigarchaeota, and Unclassified Archaea.

Many studies have been conducted to investigate the hydrological regime, water quality and biodiversity of fishes, birds, plants, and bacterioplankton communities of Poyang Lake [ 21 — 25 ]. Poyang Lake in China. The metal contents of Zn, Cd, Cu, and Pb among different sites. Predominant archaea in marine sediments degrade detrital proteins. Distribution of Archaea Community The sediment archaea community showed diverse distribution patterns among seven sampling sites.

Location of sampling sites in Poyang Lake and its tributaries. Meanwhile, the eutrophication and pollution caused by agriculture, aquiculture, and industrial activities threatened the water safety [ 17 — 19 ]. MCG-1, Methanomicrobiales, and Methanosarcinales all have a wide habitat in various water environments.

Composition of bacterial and archaeal communities in freshwater sediments with different contamination levels Lake Geneva, Switzerland Water Research. The sediment archaea community from 13 plateau freshwater lakes comprised 16 classified phyla and classes; MCG and Thermoplasmata were the most predominant groups [ 13 ].

Few previous studies indicated the variation of archaea community structure and diversity with several factors, such as sediment depth, sampling sites, and contamination [ 10 — 12 ].