scholarly journals Microbial Community Structure in Arctic Lake Sediments Reflect Variations in Holocene Climate Conditions

2020 ◽  
Vol 11 ◽  
Author(s):  
Tor Einar Møller ◽  
Willem G.M. van der Bilt ◽  
Desiree L. Roerdink ◽  
Steffen L. Jørgensen
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Lake Sediments ◽  
Microbial Community Structure ◽  
Holocene Climate ◽  
Climate Conditions ◽  
Arctic Lake

scholarly journals Eutrophication as a driver of microbial community structure in lake sediments

2020 ◽  
Vol 22 (8) ◽  
pp. 3446-3462 ◽  
Author(s):  
Xingguo Han ◽  
Carsten Johnny Schubert ◽  
Annika Fiskal ◽  
Nathalie Dubois ◽  
Mark Alexander Lever
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Lake Sediments ◽  
Microbial Community Structure

scholarly journals Lake trophic states shape microbial community structure in sediments

2020 ◽  
Author(s):  
Xingguo Han ◽  
Carsten Schubert ◽  
Annika Fiskal ◽  
Nathalie Dubois ◽  
Mark Lever
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Communities ◽  
Lake Sediments ◽  
Microbial Community Structure ◽  
Trophic State ◽  
Oligotrophic Lake ◽  
Eutrophic Lakes ◽  
Bacterial And Archaeal Communities ◽  
Archaeal Communities

<p>Lake sediments are globally important carbon sinks, and play a critical role in the global carbon cycle. Although the fate of organic carbon in lake sediments depends mostly on sedimentary microorganisms, the environmental controls on the microbial community structure in lake sediments are still poorly understood.</p><p>Here we investigate the relationships of lake trophic state, sediment redox chemistry, sediment organic matter (OM) sources and microbial community structure in sediment records across five lakes with different eutrophication histories and trophic states in central Switzerland. Our results show that, across all five lakes, bacterial and archaeal communities based on 16S rRNA gene sequencing analyses show similar sediment depth-dependent zonations at the phylum- and class-level, which appears to be primarily driven by vertical distributions of electron acceptors and secondarily by differences in the contributions of aquatic and terrestrial OM revealed by biomarkers. Yet, there are clear differences in microbial communities between lakes, most notably the higher abundances of putatively aerobic nitrifying Bacteria (Nitrospirae) and Archaea (Marine Group I, Thaumarchaeota) in anoxic sediments of oligotrophic Lake Lucerne. Furthermore, at the level of Zero-radius Operational Taxonomic Unit (ZOTU), eutrophication-related trends are more pronounced, in which microbial communities in the sediments of eutrophic lakes are more similar and share more ZOTUs with each other than with the oligotrophic lake. Notably, deep sediment layers of presently eutrophic lakes that were deposited prior to the era of eutrophication show high similarities in bacterial communities to equivalent depths in the oligotrophic lake. By contrast, archaeal communities are clearly differentiated according to trophic state only in recently deposited sediment layers, and independent of trophic state converge toward high similarities over time.</p><p>Our study indicates a significant role of trophic status in driving lacustrine sediment microbial communities and reveals fundamental differences in the temporal responses of bacterial and archaeal communities to anthropogenic eutrophication.</p>

scholarly journals Unanticipated Geochemical and Microbial Community Structure under Seasonal Ice Cover in a Dilute, Dimictic Arctic Lake

2016 ◽  
Vol 7 ◽  
Author(s):  
Ursel M. E. Schütte ◽  
Sarah B. Cadieux ◽  
Chris Hemmerich ◽  
Lisa M. Pratt ◽  
Jeffrey R. White
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Ice Cover ◽  
Arctic Lake

The First Use of Biofilm Microbial Community Structure as an Indicator of Impact of Two Dams on the Elwha River (Washington)

2009 ◽  
Vol 27 (4) ◽  
pp. 385-387
Author(s):  
W. D. Eaton ◽  
B. Wilmot ◽  
E. Epler ◽  
S. Mangiamelli ◽  
D. Barry
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Elwha River
Sign in / Sign up

Export Citation Format

Share Document