Marine microbial eukaryotes (MME) are morphologically, phylogenetically, and functionally diverse. The term protist is often used but not a valid taxonomic classification (Adl et al. 2005, 2007), and evolutionary relationships among MME at the highest taxonomic ranks remain controversial.
Functionally, they span all trophic levels, with phototrophic, heterotrophic, and mixotrophic taxa, where mixotrophic taxa are able to use both photosynthesis and heterotrophy as sources for carbon and energy. Taxonomically MME are found among all major branches of the eukaryotic tree of life, with the exception, at least up until now, of the Excavata (Adl et al. 2012). This taxonomic and functional diversity is also manifest in morphological diversity over several microscopic scales, depending on the group.
Unassignable taxa: Taxa that do not fit within descriptions based on standard taxonomy. In the case of gene sequences, this occurs when the sequence in question shows little homology with other...
References
Adl SM, Simpson AGB, Farmer MA, Andersen RA, Anderson OR, Barta JR, Bowser SS, Brugerolle G, Fensome RA, Fredericq S, James TY, Karpov S, Kugrens P, Krug J, Lane CE, Lewis LA, Lodge J, Lynn DH, Mann DG, McCourt RM, Mendoza L, Moestrup O, Mozley-Standridge SE, Nerad TA, Shearer CA, Smirnov AV, Spiegel FW, Taylor M. The new higher level classification of eukaryotes with emphasis on the taxonomy of protists. J Eukaryot Microbiol. 2005;52:399–451.
Adl SM, Leander BS, Simpson AGB, Archibald JM, Anderson OR, Bass D, Bowser SS, Brugerolle G, Farmer MA, Karpov S, Kolisko M, Lane CE, Lodge DJ, Mann DG, Meisterfeld R, Mendoza L, Moestrup O, Mozley-Standridge SE, Smirnov AV, Spiegel F. Diversity, nomenclature, and taxonomy of protists. Syst Biol. 2007;56:684–9.
Adl SM, Simpson AGB, Lane CE, Lukes J, Bass D, Bowser SS, Brown MW, Burki F, Dunthorn M, Hampl V, Heiss A, Hoppenrath M, Lara E, le Gall L, Lynn DH, McManus H, Mitchell EAD, Mozley-Stanridge SE, Parfrey LW, Pawlowski J, Rueckert S, Shadwick L, Schoch CL, Smirnov A, Spiegel FW. The revised classification of eukaryotes. J Eukaryot Microbiol. 2012;59:429–93.
Amaral-Zettler LA, McCliment EA, Ducklow HW, Huse SM. A method for studying protistan diversity using massively parallel sequencing of V9 hypervariable regions of small-subunit ribosomal RNA genes. Plos ONE. 2009;4.
Baurain D, Brinkmann H, Petersen J, Rodriguez-Ezpeleta N, Stechmann A, Demoulin V, Roger AJ, Burger G, Lang BF, Philippe H. Phylogenomic evidence for separate acquisition of plastids in cryptophytes, haptophytes, and stramenopiles. Mol Biol Evol. 2010;27:1698–709.
Comeau AM, Li WKW, Tremblay J-É, Carmack EC, Lovejoy C. Arctic ocean microbial community structure before and after the 2007 record sea ice minimum. Plos ONE. 2011;6:e27492.
Diez B, Pedros-Alio C, Massana R. Study of genetic diversity of eukaryotic picoplankton in different oceanic regions by small-subunit rRNA gene cloning and sequencing. Appl Environ Microbiol. 2001;67:2932–41.
Groisillier A, Massana R, Valentin K, Vaulotl D, Guilloul L. Genetic diversity and habitats of two enigmatic marine alveolate lineages. Aquat Microb Ecol. 2006;42:277–91.
Ichinomiya M, Yoshikawa S, Kamiya M, Ohki K, Takaichi S, and Kuwata A. Isolation and characterization of Parmales (Heterokonta/Heterokontophyta/stramenopiles) from the Oyashio region, western North Pacific. J Phycol. 2011;47:144–151.
Keeling PJ. Chromalveolates and the evolution of plastids by secondary endosymbiosis. J Eukaryot Microbiol. 2009;56:1–8.
Kosman CA, Thomsen HA, Ostergaard JB. Parmales (Chrysophyceae) from Mexican, Californian, Baltic, Arctic and Antarctic waters with the description of a new subspecies and several new forms. Phycologia. 1993;32:116–28.
Lovejoy C, Legendre L, Martineau MJ, Bacle J, von Quillfeldt CH. Distribution of phytoplankton and other protists in the North Water. Deep-Sea Res Part II Top Stud Oceanogr. 2002;49:5027–47.
Massana R, Castresana J, Balague V, Guillou L, Romari K, Groisillier A, Valentin K, Pedros-Alio C. Phylogenetic and ecological analysis of novel marine stramenopiles. Appl Environ Microbiol. 2004;70:3528–34.
Massana R, Unrein F, Rodriguez-Martinez R, Forn I, Lefort T, Pinhassi J, Not F. Grazing rates and functional diversity of uncultured heterotrophic flagellates. ISME J. 2009;3:588–96.
Moon-van der Staay SY, De Wachter R, Vaulot D. Oceanic 18S rDNA sequences from picoplankton reveal unsuspected eukaryotic diversity. Nature. 2001;409:607–10.
Not F, Valentin K, Romari K, Lovejoy C, Massana R, Tobe K, Vaulot D, Medlin LK. Picobiliphytes: a marine picoplanktonic algal group with unknown affinities to other eukaryotes. Science. 2007;315:253–5.
Not F, Latasa M, Scharek R, Viprey M, Karleskind P, Balague V, Ontoria-Oviedo I, Cumino A, Goetze E, Vaulot D, Massana R. Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes. Deep-Sea Res Part I Oceanogr Res Pap. 2008;55:1456–73.
Raven JA, Finkel ZV, Irwin AJ. Picophytoplankton: bottom-up and top-down controls on ecology and evolution. Vie Et Milieu-Life Environ. 2005;55:209–15.
Reyes-Prieto A, Yoon HS, Moustafa A, Yang EC, Andersen RA, Boo SM, Nakayama T, Ishida K, Bhattacharya D. Differential gene retention in plastids of common recent origin. Mol Biol Evol. 2010;27:1530–7.
Rozanska M, Poulin M, Gosselin M. Protist entrapment in newly formed sea ice in the Coastal Arctic Ocean. J Mar Syst. 2008;74:887–901.
Seenivasan R, Sausen N, Medlin LK, Melkonian M. Picomonas judraskeda gen. et sp. nov.: The first identified member of the Picozoa Phylum nov., a widespread group of picoeukaryotes, formerly known as ‘picobiliphytes’. PLoS ONE 2013;8(3):e59565. doi:10.1371/journal.pone.0059565.
Skovgaard A, Massana R, Balague V, Saiz E. Phylogenetic position of the copepod-infesting parasite Syndinium turbo (Dinoflagellata, Syndinea). Protist. 2005;156:413–23.
Taylor FJR, Hoppenrath M, Saldarriaga JF. Dinoflagellate diversity and distribution. Biodivers Conserv. 2008;17:407–18.
Thaler M, Lovejoy C. Distribution and diversity of a protist predator Cryothecomonas (Cercozoa) in Arctic marine waters. J Eukaryot Microbiol. 2012;59:291–9.
Vaulot D, Eikrem W, Viprey M, Moreau H. The diversity of small eukaryotic phytoplankton (<= 3 mu m) in marine ecosystems. FEMS Microbiol Rev. 2008;32:795–820.
Yoon HS, Price DC, Stepanauskas R, Rajah VD, Sieracki ME, Wilson WH, Yang EC, Duffy S, Bhattacharya D. Single-cell genomics reveals organismal interactions in uncultivated marine protists. Science. 2011;332:714–7.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2013 Springer Science+Business Media New York
About this entry
Cite this entry
Lovejoy, C. (2013). Diversity and Distribution of Marine Microbial Eukaryotes. In: Nelson, K. (eds) Encyclopedia of Metagenomics. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-6418-1_768-2
Download citation
DOI: https://doi.org/10.1007/978-1-4614-6418-1_768-2
Received:
Accepted:
Published:
Publisher Name: Springer, New York, NY
Online ISBN: 978-1-4614-6418-1
eBook Packages: Springer Reference Biomedicine and Life SciencesReference Module Biomedical and Life Sciences