Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system
Freshwater ecosystems are considered hotspots of biodiversity in Antarctic polar deserts. Anticipated warming is expected to change the hydrology of these systems due to increased meltwater and reduction of ice cover, with implications for environmental conditions and physical connectivity between h...
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Language: | English |
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Oxford University Press
2021
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Online Access: | https://doi.org/10.1093/femsec/fiab044 |
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fteawag:oai:dora:eawag_22600 2023-06-18T03:38:13+02:00 Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system Ramoneda, Josep Hawes, Ian Pascual-García, Alberto MacKey, Tyler J. Sumner, Dawn Y. Jungblut, Anne D. 2021 https://doi.org/10.1093/femsec/fiab044 eng eng Oxford University Press FEMS Microbiology Ecology--FEMS Microbiol. Ecol.--journals:983--0168-6496 eawag:22600 doi:10.1093/femsec/fiab044 scopus: 2-s2.0-85103801389 pmid: 33729491 journal id: journals:983 issn: 0168-6496 ut: 000644508800021 biofilm bacterioplankton freshwater 16s rrna gene McMurdo Dry Valleys Antarctica Journal Article Text 2021 fteawag https://doi.org/10.1093/femsec/fiab044 2023-06-04T23:49:55Z Freshwater ecosystems are considered hotspots of biodiversity in Antarctic polar deserts. Anticipated warming is expected to change the hydrology of these systems due to increased meltwater and reduction of ice cover, with implications for environmental conditions and physical connectivity between habitats. Using 16S rRNA gene sequencing, we evaluated microbial mat and planktonic communities within a connected freshwater system in the McMurdo Wright Valley, Antarctica, to determine the roles of connectivity and habitat conditions in controlling microbial assemblage composition. We examined communities from glacial Lake Brownworth, the perennially ice-covered Lake Vanda and the Onyx River, which connects the two. In Lake Vanda, we found distinct microbial assemblages occupying sub-habitats at different lake depths, while the communities from Lake Brownworth and Onyx River were structurally similar. Despite the higher physical connectivity and dispersal opportunities between bacterial communities in the shallow parts of the system, environmental abiotic conditions dominated over dispersal in driving community structure. Functional metabolic pathway predictions suggested differences in the functional gene potential between the microbial mat communities located in shallower and deeper water depths. The findings suggest that increasing temperatures and meltwater due to future climate change will affect bacterial diversity and functioning in Antarctic freshwater ecosystems. Article in Journal/Newspaper Antarc* Antarctic Antarctica McMurdo Dry Valleys DORA Eawag Antarctic Brownworth ENVELOPE(162.750,162.750,-77.433,-77.433) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Lake Brownworth ENVELOPE(162.750,162.750,-77.433,-77.433) Lake Vanda ENVELOPE(161.600,161.600,-77.517,-77.517) McMurdo Dry Valleys Onyx River ENVELOPE(162.283,162.283,-77.500,-77.500) Vanda ENVELOPE(161.550,161.550,-77.533,-77.533) Wright Valley ENVELOPE(161.833,161.833,-77.517,-77.517) FEMS Microbiology Ecology 97 4 |
institution |
Open Polar |
collection |
DORA Eawag |
op_collection_id |
fteawag |
language |
English |
topic |
biofilm bacterioplankton freshwater 16s rrna gene McMurdo Dry Valleys Antarctica |
spellingShingle |
biofilm bacterioplankton freshwater 16s rrna gene McMurdo Dry Valleys Antarctica Ramoneda, Josep Hawes, Ian Pascual-García, Alberto MacKey, Tyler J. Sumner, Dawn Y. Jungblut, Anne D. Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system |
topic_facet |
biofilm bacterioplankton freshwater 16s rrna gene McMurdo Dry Valleys Antarctica |
description |
Freshwater ecosystems are considered hotspots of biodiversity in Antarctic polar deserts. Anticipated warming is expected to change the hydrology of these systems due to increased meltwater and reduction of ice cover, with implications for environmental conditions and physical connectivity between habitats. Using 16S rRNA gene sequencing, we evaluated microbial mat and planktonic communities within a connected freshwater system in the McMurdo Wright Valley, Antarctica, to determine the roles of connectivity and habitat conditions in controlling microbial assemblage composition. We examined communities from glacial Lake Brownworth, the perennially ice-covered Lake Vanda and the Onyx River, which connects the two. In Lake Vanda, we found distinct microbial assemblages occupying sub-habitats at different lake depths, while the communities from Lake Brownworth and Onyx River were structurally similar. Despite the higher physical connectivity and dispersal opportunities between bacterial communities in the shallow parts of the system, environmental abiotic conditions dominated over dispersal in driving community structure. Functional metabolic pathway predictions suggested differences in the functional gene potential between the microbial mat communities located in shallower and deeper water depths. The findings suggest that increasing temperatures and meltwater due to future climate change will affect bacterial diversity and functioning in Antarctic freshwater ecosystems. |
format |
Article in Journal/Newspaper |
author |
Ramoneda, Josep Hawes, Ian Pascual-García, Alberto MacKey, Tyler J. Sumner, Dawn Y. Jungblut, Anne D. |
author_facet |
Ramoneda, Josep Hawes, Ian Pascual-García, Alberto MacKey, Tyler J. Sumner, Dawn Y. Jungblut, Anne D. |
author_sort |
Ramoneda, Josep |
title |
Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system |
title_short |
Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system |
title_full |
Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system |
title_fullStr |
Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system |
title_full_unstemmed |
Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system |
title_sort |
importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an antarctic freshwater system |
publisher |
Oxford University Press |
publishDate |
2021 |
url |
https://doi.org/10.1093/femsec/fiab044 |
long_lat |
ENVELOPE(162.750,162.750,-77.433,-77.433) ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(162.750,162.750,-77.433,-77.433) ENVELOPE(161.600,161.600,-77.517,-77.517) ENVELOPE(162.283,162.283,-77.500,-77.500) ENVELOPE(161.550,161.550,-77.533,-77.533) ENVELOPE(161.833,161.833,-77.517,-77.517) |
geographic |
Antarctic Brownworth Glacial Lake Lake Brownworth Lake Vanda McMurdo Dry Valleys Onyx River Vanda Wright Valley |
geographic_facet |
Antarctic Brownworth Glacial Lake Lake Brownworth Lake Vanda McMurdo Dry Valleys Onyx River Vanda Wright Valley |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
op_relation |
FEMS Microbiology Ecology--FEMS Microbiol. Ecol.--journals:983--0168-6496 eawag:22600 doi:10.1093/femsec/fiab044 scopus: 2-s2.0-85103801389 pmid: 33729491 journal id: journals:983 issn: 0168-6496 ut: 000644508800021 |
op_doi |
https://doi.org/10.1093/femsec/fiab044 |
container_title |
FEMS Microbiology Ecology |
container_volume |
97 |
container_issue |
4 |
_version_ |
1769003128578899968 |