Enhanced CO2 concentrations change the structure of Antarctic marine microbial communities

2016 ◽  
Vol 552 ◽  
pp. 93-113 ◽  
Author(s):  
AT Davidson ◽  
J McKinlay ◽  
K Westwood ◽  
PG Thomson ◽  
R van den Enden ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Co2 Concentrations ◽  
Antarctic Marine ◽  
Marine Microbial Communities

scholarly journals Shifts in coastal Antarctic marine microbial communities during and after melt water-related surface stratification

2011 ◽  
Vol 76 (3) ◽  
pp. 413-427 ◽  
Author(s):  
Anouk M.-T. Piquet ◽  
Henk Bolhuis ◽  
Michael P. Meredith ◽  
Anita G.J. Buma
Keyword(s):  
Microbial Communities ◽  
Melt Water ◽  
Antarctic Marine ◽  
Marine Microbial Communities

scholarly journals Development of a time-series shotgun metagenomics database for monitoring microbial communities at the Pacific coast of Japan

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kazutoshi Yoshitake ◽  
Gaku Kimura ◽  
Tomoko Sakami ◽  
Tsuyoshi Watanabe ◽  
Yukiko Taniuchi ◽  
...  
Keyword(s):  
Time Series ◽  
Microbial Communities ◽  
Pacific Coast ◽  
Three Dimensional ◽  
Amplicon Sequencing ◽  
Metagenomic Data ◽  
Shotgun Metagenomics ◽  
Functional Features ◽  
Pacific Coast Of Japan ◽  
Marine Microbial Communities

AbstractAlthough numerous metagenome, amplicon sequencing-based studies have been conducted to date to characterize marine microbial communities, relatively few have employed full metagenome shotgun sequencing to obtain a broader picture of the functional features of these marine microbial communities. Moreover, most of these studies only performed sporadic sampling, which is insufficient to understand an ecosystem comprehensively. In this study, we regularly conducted seawater sampling along the northeastern Pacific coast of Japan between March 2012 and May 2016. We collected 213 seawater samples and prepared size-based fractions to generate 454 subsets of samples for shotgun metagenome sequencing and analysis. We also determined the sequences of 16S rRNA (n = 111) and 18S rRNA (n = 47) gene amplicons from smaller sample subsets. We thereafter developed the Ocean Monitoring Database for time-series metagenomic data (http://marine-meta.healthscience.sci.waseda.ac.jp/omd/), which provides a three-dimensional bird’s-eye view of the data. This database includes results of digital DNA chip analysis, a novel method for estimating ocean characteristics such as water temperature from metagenomic data. Furthermore, we developed a novel classification method that includes more information about viruses than that acquired using BLAST. We further report the discovery of a large number of previously overlooked (TAG)n repeat sequences in the genomes of marine microbes. We predict that the availability of this time-series database will lead to major discoveries in marine microbiome research.

scholarly journals The Fate of Marine Bacterial Exopolysaccharide in Natural Marine Microbial Communities

PLoS ONE ◽  
2015 ◽  
Vol 10 (11) ◽  
pp. e0142690 ◽  
Author(s):  
Zilian Zhang ◽  
Yi Chen ◽  
Rui Wang ◽  
Ruanhong Cai ◽  
Yingnan Fu ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Bacterial Exopolysaccharide ◽  
Marine Microbial Communities

scholarly journals Phosphate supply explains variation in nucleic acid allocation but not C : P stoichiometry in the western North Atlantic

2014 ◽  
Vol 11 (6) ◽  
pp. 1599-1611 ◽  
Author(s):  
A. E. Zimmerman ◽  
A. C. Martiny ◽  
M. W. Lomas ◽  
S. D. Allison
Keyword(s):  
Nucleic Acid ◽  
Microbial Communities ◽  
North Atlantic ◽  
Biomass Composition ◽  
Nutrient Regeneration ◽  
Elemental Ratios ◽  
The North ◽  
Phosphate Supply ◽  
Biogeochemical Transformations ◽  
Marine Microbial Communities

Abstract. Marine microbial communities mediate many biogeochemical transformations in the ocean. Consequently, processes such as primary production and carbon (C) export are linked to nutrient regeneration and are influenced by the resource demand and elemental composition of marine microbial biomass. Laboratory studies have demonstrated that differential partitioning of element resources to various cellular components can directly influence overall cellular elemental ratios, especially with respect to growth machinery (i.e., ribosomal RNA) and phosphorus (P) allocation. To investigate whether allocation to RNA is related to biomass P content and overall C : P biomass composition in the open ocean, we characterized patterns of P allocation and C : P elemental ratios along an environmental gradient of phosphate supply in the North Atlantic subtropical gyre (NASG) from 35.67° N, 64.17° W to 22.676° N, 65.526° W. Because the NASG is characterized as a P-stressed ecosystem, we hypothesized that biochemical allocation would reflect sensitivity to bioavailable phosphate, such that greater phosphate supply would result in increased allocation toward P-rich RNA for growth. We predicted these changes in allocation would also result in lower C : P ratios with increased phosphate supply. However, bulk C : P ratios were decoupled from allocation to nucleic acids and did not appear to vary systematically across a phosphate supply gradient of 2.2–14.7 μmol m−2 d−1. Overall, we found that C : P ratios ranged from 188 to 306 along the transect, and RNA represented only 6–12% of total particulate P, whereas DNA represented 11–19%. We did find that allocation to RNA was positively correlated with phosphate supply rate, suggesting a consistent physiological response in biochemical allocation to resource supply within the whole community. These results suggest that community composition and/or nonnucleic acid P pools may influence ecosystem-scale variation in C : P stoichiometry more than nucleic acid allocation or P supply in diverse marine microbial communities.

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