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Phytoplankton across Tropical and Subtropical Regions of the Atlantic, Indian and Pacific oceans [Elektronski vir]Estrada, Marta ...We examine the large-scale distribution patterns of the nano- and microphytoplankton collected from 145 oceanic stations, at 3 m depth, the 20% light level and the depth of the sub-surface ... chlorophyll maximum, during the Malaspina-2010 Expedition (December 2010-July 2011), which covered 15 biogeographical provinces across the Atlantic, Indian and Pacific oceans, between 35°N and 40°S. In general, the water column was stratified, the surface layers were nutrient-poor and the nano- and microplankton (hereafter phytoplankton, for simplicity, although it included also heterotrophic protists) community was dominated by dinoflagellates, other flagellates and coccolithophores, while the contribution of diatoms was only important in zones with shallow nutriclines such as the equatorial upwelling regions. We applied a principal component analysis to the correlation matrix among the abundances (after logarithmic transform) of the 76 most frequent taxa to synthesize the information contained in the phytoplankton data set. The main trends of variability identified consisted of: 1) A contrast between the community composition of the upper and the lower parts of the euphotic zone, expressed respectively by positive or negative scores of the first principal component, which was positively correlated with taxa such as the dinoflagellates Oxytoxum minutum and Scrippsiella spp., and the coccolithophores Discosphaera tubifera and Syracosphaera pulchra (HOL and HET), and negatively correlated with taxa like Ophia-ster hydroideus (coccolithophore) and several diatoms, 2) a general abundance gradient between phytoplankton-rich regions with high abundances of dinoflagellate, coccolitho-phore and ciliate taxa, and phytoplankton-poor regions (second principal component), 3) differences in dominant phytoplankton and ciliate taxa among the Atlantic, the Indian and the Pacific oceans (third principal component) and 4) the occurrence of a diatom-dominated assemblage (the fourth principal component assemblage), including several pennate taxa, Planktoniella sol, Hemiaulus hauckii and Pseudo-nitzschia spp., in the divergence regions.Vir: PloS one [Elektronski vir]. - ISSN 1932-6203 (Vol. 11, iss. 3, 2016, str. 1-29)Vrsta gradiva - e-članekLeto - 2016Jezik - angleškiCOBISS.SI-ID - 3816527
Avtor
Estrada, Marta |
Delgado, Maximino |
Blasco, Dolores |
Latasa, Mikel |
Cabello, Ana Maria |
Benitez-Barrios, Verónica |
Fraile-Nuez, Eugenio |
Mozetič, Patricija |
Vidal, Monteserrat
Teme
morje |
plankton |
raziskovanje morja |
fitoplankton |
oceanske ekspedicije |
biološka oceanografija |
Plos One |
sea |
phytoplankton |
research programmes |
ocean expeditions |
Malaspina 2010 |
distribution |
ocean sampling |
Atlantic Ocean |
Pacific |
Indian Ocean
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Estrada, Marta | ![]() |
Delgado, Maximino | ![]() |
Blasco, Dolores | ![]() |
Latasa, Mikel | ![]() |
Cabello, Ana Maria | ![]() |
Benitez-Barrios, Verónica | ![]() |
Fraile-Nuez, Eugenio | ![]() |
Mozetič, Patricija | 11360 |
Vidal, Monteserrat | ![]() |
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