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...
Main Authors: | , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
eScholarship, University of California
2020
|
Subjects: | |
Online Access: | https://escholarship.org/uc/item/907434hq |
id |
ftcdlib:oai:escholarship.org/ark:/13030/qt907434hq |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:oai:escholarship.org/ark:/13030/qt907434hq 2023-05-15T14:01:12+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 fiz207 2020-02-01 application/pdf https://escholarship.org/uc/item/907434hq unknown eScholarship, University of California qt907434hq https://escholarship.org/uc/item/907434hq public FEMS microbiology ecology, vol 96, iss 2 Bacteria Archaea Oxygen Biodiversity Sunlight Energy Metabolism Geologic Sediments Antarctic Regions Lakes Microbiota Antarctica Lake Fryxell Photosynthetically Active Radiation energy microbial mat Microbiology Environmental Sciences Biological Sciences Medical and Health Sciences article 2020 ftcdlib 2021-11-29T18:17:58Z 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* Antarctic Antarctica University of California: eScholarship Antarctic Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Lake Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Bacteria Archaea Oxygen Biodiversity Sunlight Energy Metabolism Geologic Sediments Antarctic Regions Lakes Microbiota Antarctica Lake Fryxell Photosynthetically Active Radiation energy microbial mat Microbiology Environmental Sciences Biological Sciences Medical and Health Sciences |
spellingShingle |
Bacteria Archaea Oxygen Biodiversity Sunlight Energy Metabolism Geologic Sediments Antarctic Regions Lakes Microbiota Antarctica Lake Fryxell Photosynthetically Active Radiation energy microbial mat Microbiology Environmental Sciences Biological Sciences Medical and Health Sciences 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. |
topic_facet |
Bacteria Archaea Oxygen Biodiversity Sunlight Energy Metabolism Geologic Sediments Antarctic Regions Lakes Microbiota Antarctica Lake Fryxell Photosynthetically Active Radiation energy microbial mat Microbiology Environmental Sciences Biological Sciences Medical and Health Sciences |
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. |
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 |
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 |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/907434hq |
op_coverage |
fiz207 |
long_lat |
ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(163.183,163.183,-77.617,-77.617) |
geographic |
Antarctic Fryxell Lake Fryxell |
geographic_facet |
Antarctic Fryxell Lake Fryxell |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
FEMS microbiology ecology, vol 96, iss 2 |
op_relation |
qt907434hq https://escholarship.org/uc/item/907434hq |
op_rights |
public |
_version_ |
1766270789567381504 |