Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system
ABSTRACT 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...
Published in: | FEMS Microbiology Ecology |
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Oxford University Press (OUP)
2021
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Online Access: | http://dx.doi.org/10.1093/femsec/fiab044 http://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiab044/36623634/fiab044.pdf http://academic.oup.com/femsec/article-pdf/97/4/fiab044/36855492/fiab044.pdf |
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croxfordunivpr:10.1093/femsec/fiab044 2024-10-06T13:44:23+00:00 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 J. Mackey, Tyler Y. Sumner, Dawn D. Jungblut, Anne Natural History Museum Ministry of Business, Innovation and Employment British Phycological Society Antarctica New Zealand 2021 http://dx.doi.org/10.1093/femsec/fiab044 http://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiab044/36623634/fiab044.pdf http://academic.oup.com/femsec/article-pdf/97/4/fiab044/36855492/fiab044.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model FEMS Microbiology Ecology volume 97, issue 4 ISSN 0168-6496 1574-6941 journal-article 2021 croxfordunivpr https://doi.org/10.1093/femsec/fiab044 2024-09-10T04:10:36Z ABSTRACT 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 Oxford University Press Antarctic Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Vanda ENVELOPE(161.550,161.550,-77.533,-77.533) Wright Valley ENVELOPE(161.833,161.833,-77.517,-77.517) Lake Vanda ENVELOPE(161.600,161.600,-77.517,-77.517) Onyx River ENVELOPE(162.283,162.283,-77.500,-77.500) Brownworth ENVELOPE(162.750,162.750,-77.433,-77.433) Lake Brownworth ENVELOPE(162.750,162.750,-77.433,-77.433) FEMS Microbiology Ecology 97 4 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
ABSTRACT 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. |
author2 |
Natural History Museum Ministry of Business, Innovation and Employment British Phycological Society Antarctica New Zealand |
format |
Article in Journal/Newspaper |
author |
Ramoneda, Josep Hawes, Ian Pascual-García, Alberto J. Mackey, Tyler Y. Sumner, Dawn D. Jungblut, Anne |
spellingShingle |
Ramoneda, Josep Hawes, Ian Pascual-García, Alberto J. Mackey, Tyler Y. Sumner, Dawn D. Jungblut, Anne Importance of environmental factors over habitat connectivity in shaping bacterial communities in microbial mats and bacterioplankton in an Antarctic freshwater system |
author_facet |
Ramoneda, Josep Hawes, Ian Pascual-García, Alberto J. Mackey, Tyler Y. Sumner, Dawn D. Jungblut, Anne |
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 (OUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1093/femsec/fiab044 http://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiab044/36623634/fiab044.pdf http://academic.oup.com/femsec/article-pdf/97/4/fiab044/36855492/fiab044.pdf |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(161.550,161.550,-77.533,-77.533) ENVELOPE(161.833,161.833,-77.517,-77.517) ENVELOPE(161.600,161.600,-77.517,-77.517) ENVELOPE(162.283,162.283,-77.500,-77.500) ENVELOPE(162.750,162.750,-77.433,-77.433) ENVELOPE(162.750,162.750,-77.433,-77.433) |
geographic |
Antarctic Glacial Lake Vanda Wright Valley Lake Vanda Onyx River Brownworth Lake Brownworth |
geographic_facet |
Antarctic Glacial Lake Vanda Wright Valley Lake Vanda Onyx River Brownworth Lake Brownworth |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
FEMS Microbiology Ecology volume 97, issue 4 ISSN 0168-6496 1574-6941 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/femsec/fiab044 |
container_title |
FEMS Microbiology Ecology |
container_volume |
97 |
container_issue |
4 |
_version_ |
1812182777666207744 |