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AN INVESTIGATION OF THE PLANKTONIC POPULATION OF DIATOMS OF THE “ZANDKREEK” DURING THE PERIOD MARCH 1959 TO MARCH 1960
Author(s) -
STEKHOVEN J. H. SCHUURMANS
Publication year - 1961
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1961.tb00057.x
Subject(s) - herbarium , period (music) , citation , population , library science , history , geography , demography , art , biology , computer science , ecology , sociology , aesthetics
In 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.) Jorgensen, 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.