Extreme Diversity of Diplonemid Eukaryotes in the Ocean

Flegontova, Olga; Flegontov, Pavel; Malviya, S.; Audic, S.; Wincker, P.; de Vargas, C.; Bowler, C.; Lukeš, Julius; Horák, Aleš

doi:https://dx.doi.org/10.1016/j.cub.2016.09.031

Number of the records: 1

Extreme Diversity of Diplonemid Eukaryotes in the Ocean

1.

SYSNO ASEP	0468976
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Extreme Diversity of Diplonemid Eukaryotes in the Ocean
Author(s)	Flegontova, Olga (BC-A)_RID Flegontov, Pavel (BC-A)_{RID, ORCID} Malviya, S. (FR) Audic, S. (FR) Wincker, P. (FR) de Vargas, C. (FR) Bowler, C. (FR) Lukeš, Julius (BC-A)_{RID, ORCID} Horák, Aleš (BC-A)_{RID, ORCID}
Number of authors	9
Source Title	Current Biology. - : Cell Press - ISSN 0960-9822 Roč. 26, č. 22 (2016), s. 3060-3065
Number of pages	6 s.
Publication form	Online - E
Language	eng - English
Country	GB - United Kingdom
Keywords	virus-sized particles ; microbial eukaryotes ; sea-floor ; phytoplankton ; communities ; euglenozoa ; dispersal ; ecosystem
Subject RIV	EG - Zoology
R&D Projects	GPP506/12/P931 GA ČR - Czech Science Foundation (CSF)
	GA14-23986S GA ČR - Czech Science Foundation (CSF)
Institutional support	BC-A - RVO:60077344
UT WOS	000388545900025
EID SCOPUS	84997079468
DOI	10.1016/j.cub.2016.09.031
Annotation	The world's oceans represent by farthe largest biome, with great importance for the global ecosystem [1-4]. The vast majority of ocean biomass and biodiversity is composed of microscopic plankton. Recent results from the Tara Oceans metabarcoding study revealed that a significant part of the plankton in the upper sunlit layer of the ocean is represented by an understudied group of heterotrophic excavate flagellates called diplonemids [5, 6]. We have analyzed the diversity and distribution patterns of diplonemid populations on the extended set of Tara Oceans V9 18S rDNA metabarcodes amplified from 850 size-fractionated plankton communities sampled across 123 globally distributed locations, for the first time also including samples from the mesopelagic zone, which spans the depth from about 200 to 1,000 meters. Diplonemids separate into four major clades, with the vast majority falling into the deep-sea pelagic diplonemid Glade. Remarkably, diversity of this Glade inferred from metabarcoding data surpasses even that of dinoflagellates, metazoans, and rhizarians, qualifying diplonemids as possibly the most diverse group of marine planktonic eukaryotes. Diplonemids display strong vertical separation between the photic and mesopelagic layers, with the majority of their relative abundance and diversity occurring in deeper waters. Globally, diplonemids display no apparent biogeographic structuring, with a few hyperabundant cosmopolitan operational taxonomic units (OTUs) dominating their communities. Our results suggest that the planktonic diplonemids are among the key heterotrophic players in the largest ecosystem of our biosphere, yet their roles in this ecosystem remain unknown.
Workplace	Biology Centre (since 2006)
Contact	Dana Hypšová, eje@eje.cz, Tel.: 387 775 214
Year of Publishing	2017

Number of the records: 1