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Hydrobiological Bulletin

, Volume 25, Issue 1, pp 15–21 | Cite as

Field observations in the Oosterschelde (The Netherlands) onCoscinodiscus concinnus andCoscinodiscus granii (Bacillariophyceae) infected by the marine fungusLagenisma coscinodisci (Oomycetes)

  • L. P. M. J. Wetsteyn
  • L. Peperzak
Article

Abstract

During 1985–1990Coscinodiscus concinnus andCoscinodiscus granii from the Oosterschelde were infected by the marine fungusLagenisma coscinodisci, although not every year with the same intensity. Infected cells were only observed during the period July–October at water temperatures between 13.2 and 20.2°C. In 1986 and 1987 the course of the infection withL. coscinodisci inC. concinnus andC. granii, was recorded at three stations. The highest infection percentages varied between 22.2 and 58.3% inC. concinnus and between 7.1 and 41.9% inC. granii. It is concluded that the water temperature may play an important role in the appearance ofL. coscinodisci inC. concinnus andC. granii and that silicate limitation is of minor importance. Finally it is discussed that the infection was not of great importance for the phytoplankton community in the Oosterschelde.

Keywords

Oosterschelde Coscinodiscus concinnus Coscinodiscus granii Lagenisma coscinodisci 

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Copyright information

© Netherlands Hydrobiological Society 1991

Authors and Affiliations

  • L. P. M. J. Wetsteyn
    • 1
  • L. Peperzak
    • 1
  1. 1.Tidal Waters DivisionRijkswaterstaatMiddelburgThe Netherlands

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