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Basin-scale distribution patterns of photosynthetic picoeukaryotes along an Atlantic Meridional Transect
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Kirkham, Amy R., Jardillier, Ludwig, Tiganescu, Ana, Pearman, John K., Zubkov, Mikhail V. and Scanlan, David J. (2011) Basin-scale distribution patterns of photosynthetic picoeukaryotes along an Atlantic Meridional Transect. Environmental Microbiology, Volume 13 (Number 4). pp. 975-990. doi:10.1111/j.1462-2920.2010.02403.x
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Official URL: http://dx.doi.org/10.1111/j.1462-2920.2010.02403.x
Abstract
P>Photosynthetic picoeukaryotes (PPEs) of a size < 3 mu m play a crucial role in oceanic primary production. However, little is known of the structure of the PPE community over large spatial scales. Here, we investigated the distribution of various PPE classes along an Atlantic Meridional Transect sampled in boreal autumn 2004 that encompasses a range of ocean provinces (gyres, upwelling, temperate regions), using dot blot hybridization technology targeting plastid 16S rRNA gene amplicons. Two algal classes, Prymnesiophyceae and Chrysophyceae, dominated the PPE community throughout the Atlantic Ocean, over a range of water masses presenting different trophic profiles. However, these classes showed strongly complementary distributions with Chrysophyceae dominating northern temperate waters, the southern gyre and equatorial regions, while prymnesiophytes dominated the northern gyre. Phylogenetic analyses using both plastid and nuclear rRNA genes revealed a high diversity among members of both classes, including sequences contained in lineages with no close cultured counterpart. Other PPE classes were less prevalent along the transect, with members of the Cryptophyceae, Pelagophyceae and Eustigmatophyceae essentially restricted to specific regions. Multivariate statistical analyses revealed strong relationships between the distribution patterns of some of these latter PPE classes and temperature, light intensity and nutrient concentrations. Cryptophyceae, for example, were mostly found in the upwelling region and associated with higher nutrient concentrations. However, the key classes of Prymnesiophyceae and Chrysophyceae were not strongly influenced by the variables measured. Although there appeared to be a positive relationship between Chrysophyceae distribution and light intensity, the complementary distributions of these classes could not be explained by the variables recorded and this requires further explanation.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QK Botany | ||||
| Divisions: | Faculty of Science > Life Sciences (2010- ) | ||||
| Library of Congress Subject Headings (LCSH): | Phytoplankton -- Ecology -- Atlantic Ocean -- Observations, Phytoplankton -- Atlantic Ocean -- Measurement | ||||
| Journal or Publication Title: | Environmental Microbiology | ||||
| Publisher: | Blackwell | ||||
| ISSN: | 1462-2912 | ||||
| Official Date: | 2011 | ||||
| Dates: |
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| Volume: | Volume 13 | ||||
| Number: | Number 4 | ||||
| Page Range: | pp. 975-990 | ||||
| DOI: | 10.1111/j.1462-2920.2010.02403.x | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Funder: | Natural Environment Research Council (Great Britain) (NERC) | ||||
| Grant number: | NE/C003160/1 (NERC) |
Data sourced from Thomson Reuters' Web of Knowledge
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