Observations of flagellates in colonies of Phaeocystis globosa (Prymnesiophyceae); a hypothesis for their position in the life cycle

L Peperzak*, F Colijn, EG Vrieling, WWC Gieskes, JCH Peeters

*Corresponding author for this work

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    Abstract

    Flagellates of Phaeocystis globosa were observed inside colonies in North Sea samples in 1992. Field data suggest that low phosphate concentrations (less than or equal to0.5 muM) and, as a consequence of sedimentation, a 20- to >100-fold reduction of daily irradiance (to m), (ii) the haploid mesoflagellate (4.2 +/- 0.1 mum), (iii) the diploid macroflagellate (6-7 mum) which is Kornmann's (Kornmann, 1955) 'Makrozoospore', and (iv) the diploid non-flagellate colonial cell (6.1 +/- 0.2 mum). A life cycle for Phaeocystis is presented, and the life-cycle transitions still to be tested are identified.

    Original languageEnglish
    Pages (from-to)2181-2203
    Number of pages23
    JournalJournal of Plankton Research
    Volume22
    Issue number12
    Publication statusPublished - Dec-2000

    Keywords

    • DUTCH COASTAL WATERS
    • SOUTHERN NORTH-SEA
    • ECOLOGICAL INVESTIGATIONS
    • GENUS PHAEOCYSTIS
    • SPRING BLOOM
    • NANOPLANKTON
    • IRRADIANCE
    • EUTROPHICATION
    • SEDIMENTATION
    • HAPTOPHYCEAE

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