Energetic and Environmental Constraints on the Community Structure of Benthic Microbial Mats in Lake Fryxell, Antarctica
Ecological communities are regulated by the flow of energy through environments. Energy flow is typically limited by access to photosynthetically active radiation (PAR) and oxygen concentration (O2). The microbial mats growing on the bottom of Lake Fryxell, Antarctica, have well-defined environmenta...
Published in: | FEMS Microbiology Ecology |
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Online Access: | http://www.osti.gov/servlets/purl/1625319 https://www.osti.gov/biblio/1625319 https://doi.org/10.1093/femsec/fiz207 |
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ftosti:oai:osti.gov:1625319 2023-07-30T03:58:08+02:00 Energetic and Environmental Constraints on the Community Structure of Benthic Microbial Mats in Lake Fryxell, Antarctica Dillon, Megan L. Hawes, Ian Jungblut, Anne D. Mackey, Tyler J. Eisen, Jonathan A. Doran, Peter T. Sumner, Dawn Y. 2023-07-03 application/pdf http://www.osti.gov/servlets/purl/1625319 https://www.osti.gov/biblio/1625319 https://doi.org/10.1093/femsec/fiz207 unknown http://www.osti.gov/servlets/purl/1625319 https://www.osti.gov/biblio/1625319 https://doi.org/10.1093/femsec/fiz207 doi:10.1093/femsec/fiz207 2023 ftosti https://doi.org/10.1093/femsec/fiz207 2023-07-11T09:42:25Z Ecological communities are regulated by the flow of energy through environments. Energy flow is typically limited by access to photosynthetically active radiation (PAR) and oxygen concentration (O2). The microbial mats growing on the bottom of Lake Fryxell, Antarctica, have well-defined environmental gradients in PAR and (O2). We analyzed the metagenomes of layers from these microbial mats to test the extent to which access to oxygen and light controls community structure. We found variation in the diversity and relative abundances of Archaea, Bacteria and Eukaryotes across three (O2) and PAR conditions: high (O2) and maximum PAR, variable (O2) with lower maximum PAR, and low (O2) and maximum PAR. We found distinct communities structured by the optimization of energy use on a millimeter-scale across these conditions. In mat layers where (O2) was saturated, PAR structured the community. In contrast, (O2) positively correlated with diversity and affected the distribution of dominant populations across the three habitats, suggesting that meter-scale diversity is structured by energy availability. Microbial communities changed across covarying gradients of PAR and (O2). The comprehensive metagenomic analysis suggests that the benthic microbial communities in Lake Fryxell are structured by energy flow across both meter- and millimeter-scales. Other/Unknown Material Antarc* Antarctica SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Lake Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) FEMS Microbiology Ecology 96 2 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
description |
Ecological communities are regulated by the flow of energy through environments. Energy flow is typically limited by access to photosynthetically active radiation (PAR) and oxygen concentration (O2). The microbial mats growing on the bottom of Lake Fryxell, Antarctica, have well-defined environmental gradients in PAR and (O2). We analyzed the metagenomes of layers from these microbial mats to test the extent to which access to oxygen and light controls community structure. We found variation in the diversity and relative abundances of Archaea, Bacteria and Eukaryotes across three (O2) and PAR conditions: high (O2) and maximum PAR, variable (O2) with lower maximum PAR, and low (O2) and maximum PAR. We found distinct communities structured by the optimization of energy use on a millimeter-scale across these conditions. In mat layers where (O2) was saturated, PAR structured the community. In contrast, (O2) positively correlated with diversity and affected the distribution of dominant populations across the three habitats, suggesting that meter-scale diversity is structured by energy availability. Microbial communities changed across covarying gradients of PAR and (O2). The comprehensive metagenomic analysis suggests that the benthic microbial communities in Lake Fryxell are structured by energy flow across both meter- and millimeter-scales. |
author |
Dillon, Megan L. Hawes, Ian Jungblut, Anne D. Mackey, Tyler J. Eisen, Jonathan A. Doran, Peter T. Sumner, Dawn Y. |
spellingShingle |
Dillon, Megan L. Hawes, Ian Jungblut, Anne D. Mackey, Tyler J. Eisen, Jonathan A. Doran, Peter T. Sumner, Dawn Y. Energetic and Environmental Constraints on the Community Structure of Benthic Microbial Mats in Lake Fryxell, Antarctica |
author_facet |
Dillon, Megan L. Hawes, Ian Jungblut, Anne D. Mackey, Tyler J. Eisen, Jonathan A. Doran, Peter T. Sumner, Dawn Y. |
author_sort |
Dillon, Megan L. |
title |
Energetic and Environmental Constraints on the Community Structure of Benthic Microbial Mats in Lake Fryxell, Antarctica |
title_short |
Energetic and Environmental Constraints on the Community Structure of Benthic Microbial Mats in Lake Fryxell, Antarctica |
title_full |
Energetic and Environmental Constraints on the Community Structure of Benthic Microbial Mats in Lake Fryxell, Antarctica |
title_fullStr |
Energetic and Environmental Constraints on the Community Structure of Benthic Microbial Mats in Lake Fryxell, Antarctica |
title_full_unstemmed |
Energetic and Environmental Constraints on the Community Structure of Benthic Microbial Mats in Lake Fryxell, Antarctica |
title_sort |
energetic and environmental constraints on the community structure of benthic microbial mats in lake fryxell, antarctica |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1625319 https://www.osti.gov/biblio/1625319 https://doi.org/10.1093/femsec/fiz207 |
long_lat |
ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(163.183,163.183,-77.617,-77.617) |
geographic |
Fryxell Lake Fryxell |
geographic_facet |
Fryxell Lake Fryxell |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
http://www.osti.gov/servlets/purl/1625319 https://www.osti.gov/biblio/1625319 https://doi.org/10.1093/femsec/fiz207 doi:10.1093/femsec/fiz207 |
op_doi |
https://doi.org/10.1093/femsec/fiz207 |
container_title |
FEMS Microbiology Ecology |
container_volume |
96 |
container_issue |
2 |
_version_ |
1772821028115841024 |