NDLI: Protists in the polar regions: comparing occurrence in the Arctic and Southern oceans using pyrosequencing

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Protists in the polar regions: comparing occurrence in the Arctic and Southern oceans using pyrosequencing

Content Provider	Taylor & Francis Online
Author	Kilias, Estelle Metfies, Katja Wolf, Christian
Abstract	In the ongoing discussion of the distribution of protists, whether they are globally distributed or endemic to one or both of the polar regions is the subject of heated debate. In this study, we compared next-generation sequencing data from the Arctic and the Southern oceans to reveal the extent of similarities and dissimilarities between the protist communities in the polar regions. We found a total overlap of operational taxonomic units (OTUs) between the two regions of 11.2%. On closer inspection of different taxonomic groups, the overlap ranged between 5.5% (haptophytes) and 14.5% (alveolates). Within the different groups, the proportion of OTUs occurring in both regions greatly differed between the polar regions. On the one hand, the overlap between these two regions is remarkable, given the geographical distance between them. On the other hand, one could expect a greater overlap of OTUs between these regions on account of the similar environmental conditions. The overlap suggests a connection between the polar regions for at least certain species or that the evolutionary divergence has been slow, relative to the timescales of isolation. The different proportions of common OTUs among the groups or regions may be a result of different life cycle strategies or environmental adaptations.
File Format	PDF HTM / HTML
ISSN	17518369
DOI	10.3402/polar.v34.23225
Journal	Polar Research
Volume Number	34
Issue Number	1
Language	English
Publisher	Routledge
Publisher Date	2015-05-18
Access Restriction	Open
Subject Keyword	18S rDNA Bipolar Next-generation sequencing Phytoplankton Polar regions Protist distribution
Content Type	Text
Resource Type	Article
Subject	1900/1901 Environmental Chemistry Environmental Science Oceanography

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