Unexpected diversity of small eukaryotes in deep-sea Antarctic plankton

@article{LpezGarca2001UnexpectedDO,
  title={Unexpected diversity of small eukaryotes in deep-sea Antarctic plankton},
  author={P. L{\'o}pez-Garc{\'i}a and F. Rodr{\'i}guez-Valera and C. Pedr{\'o}s-Ali{\'o} and D. Moreira},
  journal={Nature},
  year={2001},
  volume={409},
  pages={603-607}
}
Phylogenetic information from ribosomal RNA genes directly amplified from the environment changed our view of the biosphere, revealing an extraordinary diversity of previously undetected prokaryotic lineages. Using ribosomal RNA genes from marine picoplankton, several new groups of bacteria and archaea have been identified, some of which are abundant. Little is known, however, about the diversity of the smallest planktonic eukaryotes, and available information in general concerns the… Expand
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References

SHOWING 1-10 OF 25 REFERENCES
Novel major archaebacterial group from marine plankton
TLDR
16S rRNA sequences obtained from Pacific Ocean bacterioplankton samples collected from depths of 100 m and 500 m are reported and it is suggested that these sequences are from a previously undescribed archaebacterial group that may have diverged from the ancestors of characterized organisms very early in evolution. Expand
Vertical distribution and phylogenetic characterization of marine planktonic Archaea in the Santa Barbara Channel
TLDR
Data suggest that marine planktonic crenarchaea and euryarchaea of temperate coastal habitats thrive in different zones of the water column, and that its members constitute a significant fraction of the prokaryotic biomass in subsurface coastal waters. Expand
Genetic diversity in Sargasso Sea bacterioplankton
TLDR
The phylogenetically analysed clone libraries of eubacterial 16S ribosomal RNA genes amplified from natural populations of Sargasso Sea picoplankton indicate the presence of a novel microbial group, the SAR 11 cluster, which appears to be a significant component of this oligotrophic bacterioplankton community. Expand
Archaea in coastal marine environments.
  • E. Delong
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 1992
TLDR
Evidence for the widespread occurrence of unusual archaea in oxygenated coastal surface waters of North America is provided and it is suggested that these microorganisms represent undescribed physiological types of archaea, which reside and compete with aerobic, mesophilic eubacteria in marine coastal environments. Expand
A molecular view of microbial diversity and the biosphere.
  • N. Pace
  • Biology, Medicine
  • Science
  • 1997
Over three decades of molecular-phylogenetic studies, researchers have compiled an increasingly robust map of evolutionary diversification showing that the main diversity of life is microbial,Expand
Extreme differences in rates of molecular evolution of foraminifera revealed by comparison of ribosomal DNA sequences and the fossil record.
TLDR
It is estimated that the rate of rDNA evolution in planktonic foraminifera is 50 to 100 times faster than in some benthic foraminaifera, and the use of the maximum-likelihood method and limitation of analyzed sites to the most conserved parts of the SSU rRNA molecule render molecular and paleontological data generally congruent. Expand
Long-branch attraction and the rDNA model of early eukaryotic evolution.
TLDR
The results suggest that the basal eurkaryotic topology drawn from rDNA analyses may be, in reality, an artifact of variation in the rate of molecular evolution among eukaryotic taxa. Expand
Diversity and Abundance of Bolidophyceae (Heterokonta) in Two Oceanic Regions
TLDR
The contribution of the Bolidophyceae to the eukaryotic DNA in both Pacific and Mediterranean waters is estimated to be lower than 1%, and high-performance liquid chromatography analyses of fucoxanthin indicated that less than 4% of the total chlorophyll a in the picoplanktonic fraction in the equatorial Pacific was due to Bolid morphology. Expand
Molecular evidence for genetic mixing of Arctic and Antarctic subpolar populations of planktonic foraminifers
TLDR
This work identifies at least one identical genotype in all three morphospecies in both the Arctic and Antarctic subpolar provinces, indicating that trans-tropical gene flow must have occurred, and reveals that foraminiferal morphos pecies can consist of a complex of genetic types. Expand
Biogeochemical evidence for dinoflagellate ancestors in the early cambrian
TLDR
Examination of dinoflagellate-specific biological markers in concentrated microfossils with known morphology identified ancient din oflageLLate ancestors from the Early Cambrian. Expand
...
1
2
3
...