Protists in Arctic drift and land‐fast sea ice
Identifieur interne : 000F50 ( Main/Exploration ); précédent : 000F49; suivant : 000F51Protists in Arctic drift and land‐fast sea ice
Auteurs : André M. Comeau [Canada] ; Benoît Philippe [Canada] ; Mary Thaler [Canada] ; Michel Gosselin [Canada] ; Michel Poulin [Canada] ; Connie Lovejoy [Canada]Source :
- Journal of Phycology [ 0022-3646 ] ; 2013-04.
Abstract
Global climate change is having profound impacts on polar ice with changes in the duration and extent of both land‐fast ice and drift ice, which is part of the polar ice pack. Sea ice is a distinct habitat and the morphologically identifiable sympagic community living within sea ice can be readily distinguished from pelagic species. Sympagic metazoa and diatoms have been studied extensively since they can be identified using microscopy techniques. However, non‐diatom eukaryotic cells living in ice have received much less attention despite taxa such as the dinoflagellate Polarella and the cercozoan Cryothecomonas being isolated from sea ice. Other small flagellates have also been reported, suggesting complex microbial food webs. Since smaller flagellates are fragile, often poorly preserved, and are difficult for non‐experts to identify, we applied high throughput tag sequencing of the V4 region of the 18S rRNA gene to investigate the eukaryotic microbiome within the ice. The sea ice communities were diverse (190 taxa) and included many heterotrophic and mixotrophic species. Dinoflagellates (43 taxa), diatoms (29 taxa) and cercozoans (12 taxa) accounted for ~80% of the sequences. The sympagic communities living within drift ice and land‐fast ice harbored taxonomically distinct communities and we highlight specific taxa of dinoflagellates and diatoms that may be indicators of land‐fast and drift ice.
Url:
DOI: 10.1111/jpy.12026
Affiliations:
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Phycol.</title><idno type="ISSN">0022-3646</idno><idno type="eISSN">1529-8817</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2013-04">2013-04</date><biblScope unit="volume">49</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="229">229</biblScope><biblScope unit="page" to="240">240</biblScope></imprint><idno type="ISSN">0022-3646</idno></series><idno type="istex">E84E10EFF03D31082707545BAD5704770AACF941</idno><idno type="DOI">10.1111/jpy.12026</idno><idno type="ArticleID">JPY12026</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-3646</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Global climate change is having profound impacts on polar ice with changes in the duration and extent of both land‐fast ice and drift ice, which is part of the polar ice pack. Sea ice is a distinct habitat and the morphologically identifiable sympagic community living within sea ice can be readily distinguished from pelagic species. Sympagic metazoa and diatoms have been studied extensively since they can be identified using microscopy techniques. However, non‐diatom eukaryotic cells living in ice have received much less attention despite taxa such as the dinoflagellate Polarella and the cercozoan Cryothecomonas being isolated from sea ice. Other small flagellates have also been reported, suggesting complex microbial food webs. Since smaller flagellates are fragile, often poorly preserved, and are difficult for non‐experts to identify, we applied high throughput tag sequencing of the V4 region of the 18S rRNA gene to investigate the eukaryotic microbiome within the ice. The sea ice communities were diverse (190 taxa) and included many heterotrophic and mixotrophic species. Dinoflagellates (43 taxa), diatoms (29 taxa) and cercozoans (12 taxa) accounted for ~80% of the sequences. The sympagic communities living within drift ice and land‐fast ice harbored taxonomically distinct communities and we highlight specific taxa of dinoflagellates and diatoms that may be indicators of land‐fast and drift ice.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Comeau, Andre M" sort="Comeau, Andre M" uniqKey="Comeau A" first="André M." last="Comeau">André M. Comeau</name></noRegion><name sortKey="Comeau, Andre M" sort="Comeau, Andre M" uniqKey="Comeau A" first="André M." last="Comeau">André M. Comeau</name><name sortKey="Gosselin, Michel" sort="Gosselin, Michel" uniqKey="Gosselin M" first="Michel" last="Gosselin">Michel Gosselin</name><name sortKey="Lovejoy, Connie" sort="Lovejoy, Connie" uniqKey="Lovejoy C" first="Connie" last="Lovejoy">Connie Lovejoy</name><name sortKey="Lovejoy, Connie" sort="Lovejoy, Connie" uniqKey="Lovejoy C" first="Connie" last="Lovejoy">Connie Lovejoy</name><name sortKey="Philippe, Benoit" sort="Philippe, Benoit" uniqKey="Philippe B" first="Benoît" last="Philippe">Benoît Philippe</name><name sortKey="Poulin, Michel" sort="Poulin, Michel" uniqKey="Poulin M" first="Michel" last="Poulin">Michel Poulin</name><name sortKey="Thaler, Mary" sort="Thaler, Mary" uniqKey="Thaler M" first="Mary" last="Thaler">Mary Thaler</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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