D
Dag Klaveness
Researcher at University of Oslo
Publications - 51
Citations - 2602
Dag Klaveness is an academic researcher from University of Oslo. The author has contributed to research in topics: Phylogenetic tree & Phylogenetics. The author has an hindex of 31, co-authored 51 publications receiving 2434 citations. Previous affiliations of Dag Klaveness include Woods Hole Oceanographic Institution.
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Phylogenetic Analyses Indicate that the 19′Hexanoyloxy-fucoxanthin-Containing Dinoflagellates Have Tertiary Plastids of Haptophyte Origin
Torstein Tengs,Ole J. Dahlberg,Kamran Shalchian-Tabrizi,Dag Klaveness,Knut Rudi,Charles F. Delwiche,Kjetill S. Jakobsen +6 more
TL;DR: Analyses of SSU rDNA from the plastid and the nuclear genome of these dinoflagellate species indicate that they have acquired their plastids via endosymbiosis of a haptophyte, and distance, parsimony, and maximum-likelihood phylogenetic analyses of plastido rRNA gene sequences place the three species within the haptophical clade.
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Freshwater Perkinsea and marine-freshwater colonizations revealed by pyrosequencing and phylogeny of environmental rDNA.
Jon Bråte,Ramiro Logares,Cédric Berney,Dan Kristofer Ree,Dag Klaveness,Kjetill S. Jakobsen,Kamran Shalchian-Tabrizi +6 more
TL;DR: Only a few successful transitions between these habitats have taken place over the entire history of Perkinsea, suggesting that the boundary between marine and fresh waters may constitute a barrier to cross-colonizations for intracellular parasites.
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Extracellular carbohydrate polymers from five desert soil algae with different cohesion in the stabilization of fine sand grain
TL;DR: Extracellular polymeric substances (EPS) from four filamentous cyanobacteria Microcoleus vaginatus, Scytonema javanicum, Phormidium tenue and Nostoc sp. were investigated for their chemical composition, structure and physical properties.
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Large-Scale Phylogenomic Analyses Reveal That Two Enigmatic Protist Lineages, Telonemia and Centroheliozoa, Are Related to Photosynthetic Chromalveolates
Fabien Burki,Yuji Inagaki,Jon Bråte,John M. Archibald,Patrick J. Keeling,Thomas Cavalier-Smith,Miako Sakaguchi,Tetsuo Hashimoto,Aleš Horák,Surendra Kumar,Dag Klaveness,Kjetill S. Jakobsen,Jan Pawlowski,Kamran Shalchian-Tabrizi +13 more
TL;DR: It is indicated that telonemids and centrohelids are members of an emerging major group of eukaryotes also comprising cryptomonads and haptophytes, and this group is possibly closely related to the SAR clade comprising stramenopiles (heterokonts), alveolates, and Rhizaria.
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Phenotypically Different Microalgal Morphospecies with Identical Ribosomal DNA: A Case of Rapid Adaptive Evolution?
Ramiro Logares,Karin Rengefors,Anke Kremp,Kamran Shalchian-Tabrizi,Andrés Boltovskoy,Torstein Tengs,Aaron Shurtleff,Dag Klaveness +7 more
TL;DR: It is suggested that the lacustrine P. aciculiferum and the marine-brackish S. hangoei diverged very recently, after a marine–freshwater transition that exposed the ancestral populations to different selective pressures, indicating a significant role of natural selection in the divergence of free-living microbes, despite their virtually unrestricted dispersal capabilities.