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Record: oai:ARNO:534690

AuthorJ.H. Schuurmans Stekhoven
TitleAn investigation of the Planktonic population of diatoms of the “ Zandkreek” during the period March 1959 to March 1960
JournalMededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht
AbstractIn a channel, which will be cut off soon, an investigation has been started in rihich the influence of the changing ecological factors will be studied. A ar’s cycle of Diatoms, investigated in the period March 1959 to March 1960 elded some interesting results. In early June Eucampia zoodiacus E. showed a Maximum, whereas Guinardia flaccida (Castr.) Perag. showed its maximum in July, mhen Eucampia zoodiacus E. was in its turn rare. Porosira glacialis (Grun.) Jörgensen, which comes from more Northern areas showed a maximum in early April. Coscinodiscus gigas praetexta (Janisch) Hustedt appeared regularly from late August, (temp. 20,4° C), until February 1960 (temp. 3,3° C). Hustedt mentions this species as occurring in the Mediterranean Sea. Some additions are made to the existing descriptions of the two last mentioned pecies.
Document typearticle
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