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Water-column stratification governs the community structure of subtropical marine picophytoplankton
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Bouman, Heather A., Ulloa, Osvaldo, Barlow, Ray, Li, William K. W., Platt, Trevor, Zwirglmaier, Katrin, Scanlan, David J. and Sathyendranath, Shubha (2011) Water-column stratification governs the community structure of subtropical marine picophytoplankton. Environmental Microbiology Reports, 3 (4). pp. 473-482. doi:10.1111/j.1758-2229.2011.00241.x
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Official URL: http://dx.doi.org/10.1111/j.1758-2229.2011.00241.x
Abstract
Summary:
The increase in the areal extent of the subtropical gyres over the past decade has been attributed to a global tendency towards increased water-column stratification. Here, we examine how vertical stratification governs the community structure of the picophytoplankton that dominate these vast marine ecosystems. We analysed phytoplankton community composition in the three Southern Subtropical basins of the Pacific, Indian and Atlantic Oceans using a variety of methods and show that the distributions of picocyanobacteria and photosynthetic picoeukaryotes (PPEs) are strongly correlated with depth and strength of vertical mixing: the changes in community structure occur at various taxonomic levels. In well-mixed waters, PPEs, in particular haptophytes, dominate, whereas in strongly stratified waters, picocyanobacteria of the genus Prochlorococcus are prevalent, regardless of whether the relative contributions to total biomass are assessed in terms of pigment or of carbon. This ecological diochotomy within the picophytoplankton supports the hypothesis that genomic streamlining provides a selective advantage for Prochlorococcus in highly stable, oligotrophic systems, but may restrict their ability to dominate in regions subject to dynamic mixing.
| Item Type: | Journal Article | ||||||||||
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| Subjects: | Q Science > QK Botany | ||||||||||
| Divisions: | Faculty of Science > Life Sciences (2010- ) | ||||||||||
| Library of Congress Subject Headings (LCSH): | Marine phytoplankton | ||||||||||
| Journal or Publication Title: | Environmental Microbiology Reports | ||||||||||
| Publisher: | Wiley-Blackwell Publishing Ltd. | ||||||||||
| ISSN: | 1758-2229 | ||||||||||
| Official Date: | August 2011 | ||||||||||
| Dates: |
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| Volume: | 3 | ||||||||||
| Number: | 4 | ||||||||||
| Number of Pages: | 10 | ||||||||||
| Page Range: | pp. 473-482 | ||||||||||
| DOI: | 10.1111/j.1758-2229.2011.00241.x | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||
| Funder: | Natural Environment Research Council (Great Britain) (NERC), Canada. Department of Fisheries and Oceans, Chilean Center for Astrophysics FONDAP (CCAFONDAP) | ||||||||||
| Grant number: | NE/G005125/1 (NERC) |
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