scholarly journals A salinity and sulfate manipulation of hypersaline microbial mats reveals stasis in the cyanobacterial community structure

2008 ◽  
Vol 2 (5) ◽  
pp. 457-470 ◽  
Author(s):  
Stefan J Green ◽  
Cameron Blackford ◽  
Patricia Bucki ◽  
Linda L Jahnke ◽  
Lee Prufert-Bebout
Keyword(s):  
Community Structure ◽  
Microbial Mats ◽  
Cyanobacterial Community ◽  
Hypersaline Microbial Mats

scholarly journals Cyanobacterial Mats in Calcite-Precipitating Serpentinite-Hosted Alkaline Springs of the Voltri Massif, Italy

2020 ◽  
Vol 9 (1) ◽  
pp. 62
Author(s):  
Aysha Kamran ◽  
Kathrin Sauter ◽  
Andreas Reimer ◽  
Theresa Wacker ◽  
Joachim Reitner ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Microbial Mats ◽  
Environmental Dna ◽  
Cyanobacterial Mats ◽  
Cyanobacterial Community ◽  
Mineral Precipitation ◽  
Community Based ◽  
Specific Adaptation ◽  
Carbonate Buildups ◽  
Generation Sequencing

(1) Background: Microbial communities in terrestrial, calcifying high-alkaline springs are not well understood. In this study, we investigate the structure and composition of microbial mats in ultrabasic (pH 10–12) serpentinite springs of the Voltri Massif (Italy). (2) Methods: Along with analysis of chemical and mineralogical parameters, environmental DNA was extracted and subjected to analysis of microbial communities based upon next-generation sequencing. (3) Results: Mineral precipitation and microbialite formation occurred, along with mat formation. Analysis of the serpentinite spring microbial community, based on Illumina sequencing of 16S rRNA amplicons, point to the relevance of alkaliphilic cyanobacteria, colonizing carbonate buildups. Cyanobacterial groups accounted for up to 45% of all retrieved sequences; 3–4 taxa were dominant, belonging to the filamentous groups of Leptolyngbyaceae, Oscillatoriales, and Pseudanabaenaceae. The cyanobacterial community found at these sites is clearly distinct from creek water sediment, highlighting their specific adaptation to these environments.

scholarly journals Comparative Metagenomics of Two Microbial Mats at Cuatro Ciénegas Basin II: Community Structure and Composition in Oligotrophic Environments

Astrobiology ◽  
2012 ◽  
Vol 12 (7) ◽  
pp. 659-673 ◽  
Author(s):  
Germán Bonilla-Rosso ◽  
Mariana Peimbert ◽  
Luis David Alcaraz ◽  
Ismael Hernández ◽  
Luis E. Eguiarte ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Mats ◽  
Comparative Metagenomics ◽  
Cuatro Ciénegas ◽  
Cuatro Ciénegas Basin

scholarly journals Revealing Cryptic Changes of Cyanobacterial Community Structure in Two Eutrophic Lakes Using eDNA Sequencing

2020 ◽  
Vol 17 (17) ◽  
pp. 6356
Author(s):  
Yongguang Jiang ◽  
Peng Xiao ◽  
Gongliang Yu ◽  
Gaofei Song ◽  
Renhui Li
Keyword(s):  
Community Structure ◽  
High Throughput Sequencing ◽  
Environmental Dna ◽  
Cyanobacterial Blooms ◽  
Erhai Lake ◽  
Water Safety ◽  
Cyanobacterial Community ◽  
Eutrophic Lakes ◽  
Abundant Otus ◽  
Cyanobacterial Diversity

Harmful cyanobacterial blooms pose a risk to human health worldwide. To enhance understanding on the bloom-forming mechanism, the spatiotemporal changes in cyanobacterial diversity and composition in two eutrophic lakes (Erhai Lake and Lushui Reservoir) of China were investigated from 2010 to 2011 by high-throughput sequencing of environmental DNA. For each sample, 118 to 260 cpcBA-IGS operational taxonomic units (OTUs) were obtained. Fifty-two abundant OTUs were identified, which made up 95.2% of the total sequences and were clustered into nine cyanobacterial groups. Although the cyanobacterial communities of both lakes were mainly dominated by Microcystis, Erhai Lake had a higher cyanobacterial diversity. The abundance of mixed Nostocales species was lower than that of Microcystis, whereas Phormidium and Synechococcus were opportunistically dominant. The correlation between the occurrence frequency and relative abundance of OTUs was poorly fitted by the Sloan neutral model. Deterministic processes such as phosphorus availability were shown to have significant effects on the cyanobacterial community structure in Erhai Lake. In summary, the Microcystis-dominated cyanobacterial community was mainly affected by the deterministic process. Opportunistically dominant species have the potential to replace Microcystis and form blooms in eutrophic lakes, indicating the necessity to monitor these species for drinking water safety.

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