Sequence diversity and novelty of natural assemblages of picoeukaryotes from the Indian Ocean.

The ISME Journal
Ramon MassanaJavier del Campo

Abstract

Despite the ecological importance of marine pico-size eukaryotes, the study of their in situ diversity using molecular tools started just a few years ago. These studies have revealed that marine picoeukaryotes are very diverse and include many novel taxa. However, the amount and structure of their phylogenetic diversity and the extent of their sequence novelty still remains poorly known, as a systematic analysis has been seldom attempted. In this study, we use a coherent and carefully curated data set of 500 published 18S ribosomal DNA sequences to quantify the diversity and novelty patterns of picoeukaryotes in the Indian Ocean. Our phylogenetic tree showed many distant lineages. We grouped sequences in OTUs (operational taxonomic units) at discrete values delineated by pair-wise Jukes-Cantor (JC) distances and tree patristic distances. At a distance of 0.01, the number of OTUs observed (237/242; using JC or patristic distances, respectively) was half the number of sequences analyzed, indicating the existence of microdiverse clusters of highly related sequences. At this distance level, we estimated 600-800 OTUs using several statistical methods. The number of OTUs observed was still substantial at higher distances (39/82 at 0....Continue Reading

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Citations

Jul 7, 2012·Environmental Science and Pollution Research International·Simon M Dittami, Bente Edvardsen
Feb 26, 2013·PloS One·Massimo C PerniceRamon Massana
Mar 31, 2012·Annual Review of Marine Science·David A CaronAstrid Schnetzer
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Feb 15, 2013·FEMS Microbiology Ecology·Xavier Triadó-Margarit, Emilio O Casamayor
Mar 15, 2016·Environmental Microbiology·Ana M CabelloRamon Massana
Aug 3, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Matthieu Leray, Nancy Knowlton
Jul 20, 2016·The Journal of Eukaryotic Microbiology·Felix WeberClaudia Wylezich
Jul 4, 2018·Environmental Microbiology·Younès DelleroAlberto Amato
Nov 11, 2018·The Journal of Eukaryotic Microbiology·Sandra Gran-StadniczeñkoBente Edvardsen
Oct 20, 2020·Frontiers in Microbiology·Julia M BrownRamunas Stepanauskas
Sep 10, 2019·Progress in Lipid Research·Christian MorabitoFabrice Rébeillé
Nov 17, 2021·Environmental Microbiology·Sebastian MetzMelina Devercelli

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