Uncovering hidden biodiversity in the Cryptophyta: New picoplanktonic clades from clone library studies at the Helgoland time series site in the southern German Bight.

Medlin, LK; Piwosz, K; Metfies, M. 2017 Uncovering hidden biodiversity in the Cryptophyta: New picoplanktonic clades from clone library studies at the Helgoland time series site in the southern German Bight.. Vie Et Milieu-Life and Environment, 67. 27-32.

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Abstract/Summary

Cryptophyceae are important group in marine phytoplankton, but little is known about the occurrence and distribution of individual species. Recently, with use of molecular probes and microarray technology, it has been shown that species related to Teleaulax spp. or Chroomonas spp. (clades 4 and 6) contributed most to cryptophyceam biomass in the North Sea. The probe for clades 4 and 6 cannot separate them and the single probe recognises members of both clades. Here, we increase the genetic diversity of our investigations of cryptophycean diversity in the North Sea by sequencing 18S rRNA clone libraries made from fractionated water samples to examine specifically the picoplanktonic fraction and to determine whether clade 4 or 6 were the dominant cyrptophytes. We focused on samples from the spring phytoplankton bloom in 2004 because the microarray signals were the strongest at this time. Excluding chimeric sequences, we detected nine cryptophycean OTUs, seven of which fell into the Teleaulax/ Plagioselmis branch, whereas two grouped with Geminigera spp. Our results indicate that these OTUs, affiliated with clade 4, may be an important component of cryptophyte community during spring bloom in the North Sea.

Item Type: Publication - Article
Additional Keywords: : Cryptophytes, diversity, picophytoplankton, North Sea
Subjects: Botany
Divisions: Marine Biological Association of the UK > Ecosystems and Environmental Change > Global environmental change and marine ecosystems
Depositing User: Dr Linda Medlin
Date made live: 04 Jul 2017 09:50
Last Modified: 04 Jul 2017 09:50
URI: http://plymsea.ac.uk/id/eprint/7446

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