scholarly journals Ocean Acidification Regulates the Activity, Community Structure, and Functional Potential of Heterotrophic Bacterioplankton in an Oligotrophic Gyre

2019 ◽  
Vol 124 (4) ◽  
pp. 1001-1017 ◽  
Author(s):  
Xiaomin Xia ◽  
Yu Wang ◽  
Yunlan Yang ◽  
Tingwei Luo ◽  
Joy D. Van Nostrand ◽  
...  
Keyword(s):  
Community Structure ◽  
Ocean Acidification ◽  
Heterotrophic Bacterioplankton ◽  
Functional Potential

scholarly journals Climate change negatively impacts dominant microbes in the sediments of a High Arctic lake

2019 ◽  
Author(s):  
Graham A. Colby ◽  
Matti O. Ruuskanen ◽  
Kyra A. St. Pierre ◽  
Vincent L. St. Louis ◽  
Alexandre J. Poulain ◽  
...  
Keyword(s):  
Climate Change ◽  
Community Structure ◽  
Environmental Changes ◽  
High Arctic ◽  
The Arctic ◽  
Large Lake ◽  
Spatial Gradients ◽  
Functional Potential ◽  
High Runoff ◽  
Sediment Microbes

AbstractTemperatures in the Arctic are expected to increase dramatically over the next century, yet little is known about how microbial communities and their underlying metabolic processes will be affected by these environmental changes in freshwater sedimentary systems. To address this knowledge gap, we analyzed sediments from Lake Hazen, NU Canada. Here, we exploit the spatial heterogeneity created by varying runoff regimes across the watershed of this uniquely large lake at these latitudes to test how a transition from low to high runoff, used as one proxy for climate change, affects the community structure and functional potential of dominant microbes. Based on metagenomic analyses of lake sediments along these spatial gradients, we show that increasing runoff leads to a decrease in taxonomic and functional diversity of sediment microbes. Our findings are likely to apply to other, smaller, glacierized watersheds typical of polar or high latitude / high altitudes ecosystems; we can predict that such changes will have far reaching consequences on these ecosystems by affecting nutrient biogeochemical cycling, the direction and magnitude of which are yet to be determined.

scholarly journals Microbial Community Structure and Functional Potential Along a Hypersaline Gradient

2018 ◽  
Vol 9 ◽  
Author(s):  
Jeffrey A. Kimbrel ◽  
Nicholas Ballor ◽  
Yu-Wei Wu ◽  
Maude M. David ◽  
Terry C. Hazen ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Functional Potential

scholarly journals Response of bacterioplankton community structure to an artificial gradient of <i>p</i>CO<sub>2</sub> in the Arctic Ocean

2013 ◽  
Vol 10 (6) ◽  
pp. 3679-3689 ◽  
Author(s):  
R. Zhang ◽  
X. Xia ◽  
S. C. K. Lau ◽  
C. Motegi ◽  
M. G. Weinbauer ◽  
...  
Keyword(s):  
Community Structure ◽  
Ocean Acidification ◽  
Bacterial Diversity ◽  
Clone Library ◽  
Marine Ecosystem ◽  
Negative Relationship ◽  
16S Rrna Genes ◽  
The Arctic ◽  
Rrna Genes ◽  
Clone Library Analysis

Abstract. In order to test the influences of ocean acidification on the ocean pelagic ecosystem, so far the largest CO2 manipulation mesocosm study (European Project on Ocean Acidification, EPOCA) was performed in Kings Bay (Kongsfjorden), Spitsbergen. During a 30 day incubation, bacterial diversity was investigated using DNA fingerprinting and clone library analysis of bacterioplankton samples. Terminal restriction fragment length polymorphism (T-RFLP) analysis of the PCR amplicons of the 16S rRNA genes revealed that general bacterial diversity, taxonomic richness and community structure were influenced by the variation of productivity during the time of incubation, but not the degree of ocean acidification. A BIOENV analysis suggested a complex control of bacterial community structure by various biological and chemical environmental parameters. The maximum apparent diversity of bacterioplankton (i.e., the number of T-RFs) in high and low pCO2 treatments differed significantly. A negative relationship between the relative abundance of Bacteroidetes and pCO2 levels was observed for samples at the end of the experiment by the combination of T-RFLP and clone library analysis. Our study suggests that ocean acidification affects the development of bacterial assemblages and potentially impacts the ecological function of the bacterioplankton in the marine ecosystem.

scholarly journals Microbial community structure and functional potential of lava-formed Gotjawal soils in Jeju, Korea

PLoS ONE ◽  
2018 ◽  
Vol 13 (10) ◽  
pp. e0204761 ◽  
Author(s):  
Jong-Shik Kim ◽  
Dae-Shin Kim ◽  
Keun Chul Lee ◽  
Jung-Sook Lee ◽  
Gary M. King ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Functional Potential

scholarly journals Correction: Microbial community structure and functional potential of lava-formed Gotjawal soils in Jeju, Korea

PLoS ONE ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. e0211435
Author(s):  
Jong-Shik Kim ◽  
Dae-Shin Kim ◽  
Keun Chul Lee ◽  
Jung-Sook Lee ◽  
Gary M. King ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Functional Potential

Effects of uranium concentration on microbial community structure and functional potential

2017 ◽  
Vol 19 (8) ◽  
pp. 3323-3341 ◽  
Author(s):  
Brodie Sutcliffe ◽  
Anthony A. Chariton ◽  
Andrew J. Harford ◽  
Grant C. Hose ◽  
Paul Greenfield ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Uranium Concentration ◽  
Functional Potential
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