Microbial Biogeography of Six Salt Lakes in Inner Mongolia, China, and a Salt Lake in Argentina

Pagaling, Eulyn; Wang, Huanzhi; Venables, Madeleine; Wallace, Andrew D.; Grant, William D.; Cowan, Don A.; Jones, Brian E.; Ma, Yanhe; Ventosa, António; Heaphy, Shaun

doi:10.1128/aem.00040-09

Cited by 119 publications

(84 citation statements)

References 64 publications

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“…This study revealed that fungal community composition was positively correlated with geographic distance, and that geographic distance was a driver of diversity (r ¼ 0.224, P ¼ 0.003) at a large scale in wetlands. The effect of geographic distance on fungal biogeography in this study was consistent with results for bacterial biogeography in sediments (Pagaling et al, 2009;Schauer et al, 2010) and for the biogeography of macroorganisms in wetlands (Declerck et al, 2011). That the distributions of larger organisms are limited by mountains, large bodies of water and other physical barriers seems reasonable (Prosser et al, 2007).…”

Section: Discussionsupporting

confidence: 78%

“…Recent studies have shown that the drivers of fungal and bacterial diversity differ with scale and microorganism type (Fierer et al, 2007;Pommier et al, 2007;Ge et al, 2008;Pagaling et al, 2009). MRT analysis in this study showed that the distribution of fungi in sediments along the Changjiang River and in other samples across China was significantly influenced by historical contingencies (sampling location).…”

Section: Discussionmentioning

confidence: 71%

“…Several studies reported that geographic distance, which is considered to be representative of historical contingencies, significantly affected bacterial diversity (Ramette and Tiedje, 2007;Ge et al, 2008;Schauer et al, 2010), while other observations demonstrated that bacterial biogeography was significantly affected by contemporary environmental conditions (Fierer et al, 2007). In one study, bacterial biogeography was affected by geographic distance, while archaeal biogeography was influenced by contemporary environmental factors (Pagaling et al, 2009). For fungal biogeography, both contemporary environmental conditions and historical contingencies have been reported to have important roles (Green et al, 2004).…”

Section: Introductionmentioning

confidence: 95%

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The biogeography of fungal communities in wetland sediments along the Changjiang River and other sites in China

et al. 2013

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Whether fungal community structure depends more on historical factors or on contemporary factors is controversial. This study used culture-dependent and -independent (polymerase chain reactiondenaturing gradient gel electrophoresis (PCR-DGGE)) methods to assess the influence of historical and contemporary factors on the distributions of fungi in the wetland sediments at 10 locations along the Changjiang River and at 10 other locations in China. The culture-dependent approach detected greater species diversity (177 operational taxonomic units (OTUs)) than PCR-DGGE analysis (145 OTUs), and the species in the genera of Penicillium (relative frequency ¼ 16.8%), Fusarium (15.4%), Aspergillus (7.6%), Trichoderma (5.8%) and Talaromyces (4.2%) were dominant. On the basis of DGGE data, fungal diversity along the Changjiang River increased from upstream to downstream; altitude explained 44.8% of this variation in diversity. And based on the data from all 20 locations, the fungal communities were geographically clustered into three groups: Southern China, Northern China and the Qinghai-Tibetan Plateau. Multivariate regression tree analysis for data from the 20 locations indicated that the fungal community was influenced primarily by location (which explained 61.8% of the variation at a large scale), followed by total potassium (9.4%) and total nitrogen (3.5%) at a local scale. These results are consistent with the concept that geographic distance is the dominant factor driving variation in fungal diversity at a regional scale (1000-4000 km), whereas environmental factors (total potassium and total nitrogen) explain variation in fungal diversity at a local scale (o1000 km).

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Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 95%

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The biogeography of fungal communities in wetland sediments along the Changjiang River and other sites in China

et al. 2013

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“…Although the share of new sequences in the bacterial library (42.3%) was less than that in the archaeal one (53.9%) [10], the degree of novelty concerning the higher taxonomic level and sequences with similarity of less than 90% to the closest match and 85% to the culturable neighbour were established. Bacterial diversity on the level of higher taxa could be explained by the reported observation that halophilic bacteria are less mobile or less robust across large distances than halophilic archaea and show a higher tendency towards endemism [36]. Sequences with similarity of less than 90% to the closest match and 85% to the culturable neighbour were established.…”

Section: Degree Of Novelty Of Ps Bacterial Sequencesmentioning

confidence: 99%

Phylogenetic analysis of the bacterial community in a crystallizer pond, Pomorie salterns, Bulgaria

Kambourova

Tomova

Boyadzhieva

et al. 2016

Biotechnology & Biotechnological Equipment

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The aim of this study was to investigate the bacterial community habituating P18, the biggest crystallizer pond in Pomorie salterns (34% salinity). The obtained results showed that the bacterial community differs from many previous reports of low bacterial diversity in hypersaline environments and demonstrates unusually high diversity of presented taxa, some unusual domination of diverse genera not reported before as dominant and identification of previously unknown 16S rRNA sequences. The retrieved 23 bacterial operational taxonomic units (OTUs) affiliated with 15 bacterial genera from four phyla -Firmicutes, 47.5%; Proteobacteria, 23.1%; Bacteroidetes, 22%; Deinococcus-Thermus, 2.4%; and one-candidate division SR1, 4.8%. Representatives of the phylum Firmicutes predominated in the bacterial community with almost half of the retrieved sequences. Almost all clones branched together with cultured halophiles or uncultured clones retrieved from saline niches. Despite of the high salt concentration, some of the closest phylogenetic neighbours were moderate halophiles. New sequences represented 42.3% of bacterial OTUs. Some of them formed separate branches with similarity less than 85%.

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“…Achieving this goal requires coordinated, detailed, accurate measurements of both physical and biological factors, but obtaining this information over temporal and spatial scales relevant to natural microbial communities is challenging. Extreme hypersaline aqueous environments harboring limited phylogenetic diversity provide tractable model ecosystems to confront these challenges (Demergasso et al, 2008;Bodaker et al, 2009;Pagaling et al, 2009;Oh et al, 2010;Boujelben et al, 2012;MakhdoumiKakhki et al, 2012;Oren, 2013). Although overall salt concentrations in these habitats are, by definition, at or exceeding the limits of ionic solubility, geochemical variation in water sources as well as minerals dissolved from surrounding rocks and sediments contribute to variable ratios of different ionic species over space and time (Javor, 1989;Oren, 2013).…”

Section: Introductionmentioning

confidence: 99%

Seasonal fluctuations in ionic concentrations drive microbial succession in a hypersaline lake community

et al. 2013

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Microbial community succession was examined over a two-year period using spatially and temporally coordinated water chemistry measurements, metagenomic sequencing, phylogenetic binning and de novo metagenomic assembly in the extreme hypersaline habitat of Lake Tyrrell, Victoria, Australia. Relative abundances of Haloquadratum-related sequences were positively correlated with co-varying concentrations of potassium, magnesium and sulfate, but not sodium, chloride or calcium ions, while relative abundances of Halorubrum, Haloarcula, Halonotius, Halobaculum and Salinibacter-related sequences correlated negatively with Haloquadratum and these same ionic factors. Nanohaloarchaea and Halorhabdus-related sequence abundances were inversely correlated with each other, but not other taxonomic groups. These data, along with predicted gene functions from nearly-complete assembled population metagenomes, suggest different ecological phenotypes for Nanohaloarchaea and Halorhabdus-related strains versus other community members. Nucleotide percent G þ C compositions were consistently lower in community metagenomic reads from summer versus winter samples. The same seasonal G þ C trends were observed within taxonomically binned read subsets from each of seven different genus-level archaeal groups. Relative seasonal abundances were also linked to percent G þ C for assembled population genomes. Together, these data suggest that extreme ionic conditions may exert selective pressure on archaeal populations at the level of genomic nucleotide composition, thus contributing to seasonal successional processes. Despite the unavailability of cultured representatives for most of the organisms identified in this study, effective coordination of physical and biological measurements has enabled discovery and quantification of unexpected taxon-specific, environmentally mediated factors influencing microbial community structure.

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Microbial Biogeography of Six Salt Lakes in Inner Mongolia, China, and a Salt Lake in Argentina

Cited by 119 publications

References 64 publications

The biogeography of fungal communities in wetland sediments along the Changjiang River and other sites in China

The biogeography of fungal communities in wetland sediments along the Changjiang River and other sites in China

Phylogenetic analysis of the bacterial community in a crystallizer pond, Pomorie salterns, Bulgaria

Seasonal fluctuations in ionic concentrations drive microbial succession in a hypersaline lake community

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