Energetic and Environmental Constraints on the Community Structure of Benthic Microbial Mats in Lake Fryxell, Antarctica
ABSTRACT 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 env...
Published in: | FEMS Microbiology Ecology |
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Oxford University Press (OUP)
2020
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Online Access: | http://dx.doi.org/10.1093/femsec/fiz207 http://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiz207/31721760/fiz207.pdf http://academic.oup.com/femsec/article-pdf/96/2/fiz207/31906595/fiz207.pdf |
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croxfordunivpr:10.1093/femsec/fiz207 2024-09-15T17:46:46+00:00 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 National Science Foundation McMurdo Long Term Ecological Research project Antarctic New Zealand Program NASA 2020 http://dx.doi.org/10.1093/femsec/fiz207 http://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiz207/31721760/fiz207.pdf http://academic.oup.com/femsec/article-pdf/96/2/fiz207/31906595/fiz207.pdf en eng Oxford University Press (OUP) http://creativecommons.org/licenses/by-nc/4.0/ FEMS Microbiology Ecology volume 96, issue 2 ISSN 0168-6496 1574-6941 journal-article 2020 croxfordunivpr https://doi.org/10.1093/femsec/fiz207 2024-08-27T04:15:42Z ABSTRACT 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. Article in Journal/Newspaper Antarc* Antarctica Oxford University Press FEMS Microbiology Ecology 96 2 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
ABSTRACT 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. |
author2 |
National Science Foundation McMurdo Long Term Ecological Research project Antarctic New Zealand Program NASA |
format |
Article in Journal/Newspaper |
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 |
publisher |
Oxford University Press (OUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1093/femsec/fiz207 http://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiz207/31721760/fiz207.pdf http://academic.oup.com/femsec/article-pdf/96/2/fiz207/31906595/fiz207.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
FEMS Microbiology Ecology volume 96, issue 2 ISSN 0168-6496 1574-6941 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1093/femsec/fiz207 |
container_title |
FEMS Microbiology Ecology |
container_volume |
96 |
container_issue |
2 |
_version_ |
1810495140780834816 |