Microbial communities of the Laurentian Great Lakes reflect connectivity and local biogeochemistry
Abstract
The Laurentian Great Lakes are a vast, interconnected freshwater system spanning strong physicochemical gradients, thus constituting a powerful natural laboratory for addressing fundamental questions about microbial ecology and evolution. We present a comparative analysis of pelagic microbial communities across all five Laurentian Great Lakes, focusing on Bacterial and Archaeal picoplankton characterized via 16S rRNA amplicon sequencing. We collected samples throughout the water column from the major basins of each lake in spring and summer over 2 years. Two oligotypes, classified as LD12 (Alphaproteobacteria) and acI-B1 (Actinobacteria), were among the most abundant in every sample. At the same time, microbial communities showed distinct patterns with depth during summer stratification. Deep hypolimnion samples were frequently dominated by a Chloroflexi oligotype that reached up to 19% relative abundance. Stratified surface communities differed between the colder, less productive upper lakes (Superior, Michigan, Huron) and warmer, more productive lower lakes (Erie, Ontario), in part due to an Actinobacteria oligotype (acI-C2) that averaged 7.7% of sequences in the lower lakes but <0.2% in the upper lakes. Together, our findings suggest that both hydrologic connectivity and local selective pressures shape microbial communities in the Great Lakes and establish a framework for future investigations.
- Authors:
-
- Univ. of Chicago, IL (United States). Dept. of the Geophysical Sciences
- Univ. of Wisconsin, Milwaukee, WI (United States). School of Freshwater Sciences
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1625853
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Environmental Microbiology
- Additional Journal Information:
- Journal Volume: 22; Journal Issue: 1; Journal ID: ISSN 1462-2912
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; Microbiology
Citation Formats
Paver, Sara F., Newton, Ryan J., and Coleman, Maureen L. Microbial communities of the Laurentian Great Lakes reflect connectivity and local biogeochemistry. United States: N. p., 2019.
Web. doi:10.1111/1462-2920.14862.
Paver, Sara F., Newton, Ryan J., & Coleman, Maureen L. Microbial communities of the Laurentian Great Lakes reflect connectivity and local biogeochemistry. United States. https://doi.org/10.1111/1462-2920.14862
Paver, Sara F., Newton, Ryan J., and Coleman, Maureen L. Fri .
"Microbial communities of the Laurentian Great Lakes reflect connectivity and local biogeochemistry". United States. https://doi.org/10.1111/1462-2920.14862. https://www.osti.gov/servlets/purl/1625853.
@article{osti_1625853,
title = {Microbial communities of the Laurentian Great Lakes reflect connectivity and local biogeochemistry},
author = {Paver, Sara F. and Newton, Ryan J. and Coleman, Maureen L.},
abstractNote = {The Laurentian Great Lakes are a vast, interconnected freshwater system spanning strong physicochemical gradients, thus constituting a powerful natural laboratory for addressing fundamental questions about microbial ecology and evolution. We present a comparative analysis of pelagic microbial communities across all five Laurentian Great Lakes, focusing on Bacterial and Archaeal picoplankton characterized via 16S rRNA amplicon sequencing. We collected samples throughout the water column from the major basins of each lake in spring and summer over 2 years. Two oligotypes, classified as LD12 (Alphaproteobacteria) and acI-B1 (Actinobacteria), were among the most abundant in every sample. At the same time, microbial communities showed distinct patterns with depth during summer stratification. Deep hypolimnion samples were frequently dominated by a Chloroflexi oligotype that reached up to 19% relative abundance. Stratified surface communities differed between the colder, less productive upper lakes (Superior, Michigan, Huron) and warmer, more productive lower lakes (Erie, Ontario), in part due to an Actinobacteria oligotype (acI-C2) that averaged 7.7% of sequences in the lower lakes but <0.2% in the upper lakes. Together, our findings suggest that both hydrologic connectivity and local selective pressures shape microbial communities in the Great Lakes and establish a framework for future investigations.},
doi = {10.1111/1462-2920.14862},
journal = {Environmental Microbiology},
number = 1,
volume = 22,
place = {United States},
year = {Fri Nov 22 00:00:00 EST 2019},
month = {Fri Nov 22 00:00:00 EST 2019}
}
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