A decadal perspective on north water microbial eukaryotes as Arctic Ocean sentinels
The North Water region, between Greenland and Ellesmere Island, with high populations of marine birds and mammals, is an Arctic icon. Due to climate related changes, seasonal patterns in water column primary production are changing but the implications for the planktonic microbial eukaryote communit...
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fttriple:oai:gotriple.eu:http://hdl.handle.net/20.500.11794/70021 2023-05-15T14:48:14+02:00 A decadal perspective on north water microbial eukaryotes as Arctic Ocean sentinels Freyria, Nastasia J Joli, Nathalie Lovejoy, Connie. Arctique Baffin, Région de la baie de Nares, Détroit de 2021-04-16 https://hdl.handle.net/20.500.11794/70021 en eng Nature Publishing Group http://hdl.handle.net/20.500.11794/70021 other lic_creative-commons CorpusUL envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/20.500.11794/70021 2023-01-22T17:35:31Z The North Water region, between Greenland and Ellesmere Island, with high populations of marine birds and mammals, is an Arctic icon. Due to climate related changes, seasonal patterns in water column primary production are changing but the implications for the planktonic microbial eukaryote communities that support the ecosystem are unknown. Here we report microbial community phenology in samples collected over 12 years (2005–2018) from July to October and analysed using high throughput 18S rRNA V4 amplicon sequencing. Community composition was tied to seasonality with summer communities more variable than distinct October communities. In summer, sentinel pan- Arctic species, including a diatom in the Chaetoceros socialis-gelidus complex and the picochlorophyte Micromonas polaris dominated phytoplankton and were summer specialists. In autumn, uncultured undescribed open water dinoflagellates were favored, and their ubiquity suggests they are sentinels of arctic autumn conditions. Despite the input of nutrients into surface waters, autumn chlorophyll concentrations remained low, refuting projected scenarios that longer ice-free seasons are synonymous with high autumn production and a diatom dominated bloom. Overall, the summer sentinel microbial taxa are persisting, and a subset oceanic dinoflagellate should be monitored for possible ecosystem shifts as later autumn ice formation becomes prevalent elsewhere. Article in Journal/Newspaper Arctic Arctic Ocean Arctique* Baffin Ellesmere Island Greenland Phytoplankton Unknown Arctic Arctic Ocean Ellesmere Island Greenland Nares ENVELOPE(158.167,158.167,-81.450,-81.450) |
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envir geo Freyria, Nastasia J Joli, Nathalie Lovejoy, Connie. A decadal perspective on north water microbial eukaryotes as Arctic Ocean sentinels |
topic_facet |
envir geo |
description |
The North Water region, between Greenland and Ellesmere Island, with high populations of marine birds and mammals, is an Arctic icon. Due to climate related changes, seasonal patterns in water column primary production are changing but the implications for the planktonic microbial eukaryote communities that support the ecosystem are unknown. Here we report microbial community phenology in samples collected over 12 years (2005–2018) from July to October and analysed using high throughput 18S rRNA V4 amplicon sequencing. Community composition was tied to seasonality with summer communities more variable than distinct October communities. In summer, sentinel pan- Arctic species, including a diatom in the Chaetoceros socialis-gelidus complex and the picochlorophyte Micromonas polaris dominated phytoplankton and were summer specialists. In autumn, uncultured undescribed open water dinoflagellates were favored, and their ubiquity suggests they are sentinels of arctic autumn conditions. Despite the input of nutrients into surface waters, autumn chlorophyll concentrations remained low, refuting projected scenarios that longer ice-free seasons are synonymous with high autumn production and a diatom dominated bloom. Overall, the summer sentinel microbial taxa are persisting, and a subset oceanic dinoflagellate should be monitored for possible ecosystem shifts as later autumn ice formation becomes prevalent elsewhere. |
format |
Article in Journal/Newspaper |
author |
Freyria, Nastasia J Joli, Nathalie Lovejoy, Connie. |
author_facet |
Freyria, Nastasia J Joli, Nathalie Lovejoy, Connie. |
author_sort |
Freyria, Nastasia J |
title |
A decadal perspective on north water microbial eukaryotes as Arctic Ocean sentinels |
title_short |
A decadal perspective on north water microbial eukaryotes as Arctic Ocean sentinels |
title_full |
A decadal perspective on north water microbial eukaryotes as Arctic Ocean sentinels |
title_fullStr |
A decadal perspective on north water microbial eukaryotes as Arctic Ocean sentinels |
title_full_unstemmed |
A decadal perspective on north water microbial eukaryotes as Arctic Ocean sentinels |
title_sort |
decadal perspective on north water microbial eukaryotes as arctic ocean sentinels |
publisher |
Nature Publishing Group |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.11794/70021 |
op_coverage |
Arctique Baffin, Région de la baie de Nares, Détroit de |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) |
geographic |
Arctic Arctic Ocean Ellesmere Island Greenland Nares |
geographic_facet |
Arctic Arctic Ocean Ellesmere Island Greenland Nares |
genre |
Arctic Arctic Ocean Arctique* Baffin Ellesmere Island Greenland Phytoplankton |
genre_facet |
Arctic Arctic Ocean Arctique* Baffin Ellesmere Island Greenland Phytoplankton |
op_source |
CorpusUL |
op_relation |
http://hdl.handle.net/20.500.11794/70021 |
op_rights |
other lic_creative-commons |
op_doi |
https://doi.org/20.500.11794/70021 |
_version_ |
1766319334014058496 |