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Testing the iron hypothesis in ecosystems of the equatorial Pacific Ocean
Findings indicate that iron limitation can control rates of phytoplankton productivity and biomass in the ocean. Expand
A Single Species, Micromonas pusilla (Prasinophyceae), Dominates the Eukaryotic Picoplankton in the Western English Channel
Eight new 18S ribosomal DNA oligonucleotide probes specific for different Prasinophyceae clades, genera, and species are designed and tested and applied to samples from a marine coastal site off Roscoff between July 2000 and September 2001. Expand
Genome analysis of the proteorhodopsin-containing marine bacterium Polaribacter sp. MED152 (Flavobacteria)
Analysis of marine cyanobacteria and proteobacteria genomes has provided a profound understanding of the life strategies of these organisms and their ecotype differentiation and metabolisms. However,Expand
Targeted metagenomics and ecology of globally important uncultured eukaryotic phytoplankton
Targeted metagenomics analysis of uncultured pico-prymnesiophytes sorted by flow cytometry from subtropical North Atlantic waters reveals a composite nuclear-encoded gene repertoire with strong green-lineage affiliations, which contrasts with the evolutionary history indicated by the plastid genome. Expand
A comparison of HPLC pigment signatures and electron microscopic observations for oligotrophic waters of the North Atlantic and Pacific Oceans
This study compares, for the first time, the taxonomic composition based upon HPLC pigment signatures with direct electron microscopic taxonomic identifications from two sets of open ocean oligotrophic field samples, and finds that the Prymnesiophyceae and the newly described Pelagophycesae were the two most abundant groups of eukaryotes. Expand
On the chlorophyll a retention properties of glass‐fiber GF/F filters
Comparisons of the retention properties of glass-fiber GF/F and 0.2-μm membrane filters show that these two filter types retain equivalent amounts of Chl a in the open ocean waters of the Pacific Ocean, contradict a recent report that suggests that in some casesGF/F filters underestimate chlorophyll concentration. Expand
Late summer community composition and abundance of photosynthetic picoeukaryotes in Norwegian and Barents Seas
Investigation of marine picoeukaryotic diversity in samples collected in late summer 2002 at the boundary between the Norwegian, Greenland, and Barents Seas found members of the division Chlorophyta were the major components in truly Arctic waters. Expand
Biological response to iron fertilization in the eastern equatorial Pacific (IronEx II). III. Dynamics of phytoplankton growth and microzooplankton grazing
Mesoscale iron-enrichment of high-nutrient, low chlorophyll waters in the eastern equatorial Pacific clearly demonstrated that phytoplankton growth rates and standing stocks were iron-limited, but the food web also demonstrated a remarkable resiliency to environmental perturbation by establishing a new balance. Expand
Thick-shelled, grazer-protected diatoms decouple ocean carbon and silicon cycles in the iron-limited Antarctic Circumpolar Current
It is suggested that large-scale iron fertilization of the silicate-rich Southern Ocean will not change silicon sequestration but will add carbon to the sinking silica flux, implying that thick-shelled, hence grazer-protected, diatom species evolved in response to heavy copepod grazing pressure in the presence of an abundant silicate supply. Expand
Improving estimations of phytoplankton class abundances using CHEMTAX
To test the sensitivity of CHEMTAX to initial ratios and its effectiveness to quantitatively discriminate the existing phytoplankton groups, 8 different initial matrices of pigment ratios were used on an artificial pigment data- base of 40 samples built from known pigment ratios. Expand