English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/171866
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Major role of nutrient supply in the control of picophytoplankton community structure

AuthorsMouriño-Carballido, Beatriz; Cermeño, Pedro ; Gasol, Josep M. ; Gilcoto, Miguel ; Graña, R.; Vallina, Sergio M. ; Villamaña, Marina
Issue Date21-Feb-2016
PublisherAmerican Geophysical Union
Citation2016 Ocean Sciences Meeting
AbstractThe Margalef´s mandala (1978) is a simplified bottom-up control model that explains how mixing and nutrient concentration determine the composition of marine phytoplankton communities. Due to the difficulties of measuring turbulence in the field, previous attempts to verify this model have applied different proxies for nutrient supply, and very often used interchangeably the terms mixing and stratification. Moreover, because the mandala was conceived before the discovery of smaller phytoplankton groups (picoplankton <2 µm), it describes only the succession of vegetative phases of microplankton. In order to test the applicability of the classical mandala to picoplankton groups, we used a multidisciplinary approach including specifically designed field observations supported by remote sensing, database analyses, and modeling and laboratory chemostat experiments. Simultaneous estimates of nitrate diffusive fluxes, derived from microturbulence observations, and picoplankton abundance collected in more than 200 stations, spanning widely different hydrographic regimes, showed that the contribution of eukaryotes to picoautotrophic biomass increases with nutrient supply, whereas that of picocyanobacteria shows the opposite trend. These findings were supported by laboratory and modeling chemostat experiments that reproduced the competitive dynamics between picoeukaryote sand picocyanobacteria as a function of changing nutrient supply. Our results indicate that nutrient supply controls the distribution of picoplankton functional groups in the ocean, further supporting the model proposed by Margalef
DescriptionMouriño-Carballido, Beatriz ... et al.-- 2016 Ocean Sciences Meeting, 21-26 February 2016, New Orleans
Publisher version (URL)https://osm.agu.org/2016/scientific-program/
Appears in Collections:(ICM) Comunicaciones congresos
(IIM) Comunicaciones congresos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.