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Phytoplankton Periodicity in a Eutrophic Coastal Water of the Baltic Sea
Author(s) -
Wasmund Norbert
Publication year - 1994
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19940790212
Subject(s) - phytoplankton , eutrophication , oscillatoria , spring bloom , oceanography , cyanobacteria , lyngbya , algae , algal bloom , bloom , diatom , estuary , plankton , spring (device) , biology , chlorophyll a , ecology , environmental science , nutrient , botany , geology , bacteria , physics , genetics , thermodynamics
The phytoplankton periodicity in the Darss‐Zingst bodden chain, an estuary‐like coastal water of the southern Baltic Sea, was investigated from 1984 to 1990. The following functional groups were established: 1.) nitrogen‐fixing Cyanobacteria plus Oscillatoria limnetica , 2.) coccoid Chlorophyceae, Gomphosphaeria pusilla, Lyngbya contorta and Stephanodiscus hantzschii , 3.) coccoid Cyanobacteria except Gomphosphaeria , 4.) diatoms except Stephanodiscus , 5.) Cryptophyceae and some other flagellates. A general seasonal pattern was observable: in cold winters group 5 dominates; in spring a diatom bloom (= group 4) occurred, which was followed by the development of group 2; steep temperature increases caused a summer bloom of nitrogen‐fixing cyanobacteria (= group 1), which was followed by groups 2 and 3 in autumn; in bland winters group 2 lasts until spring. Grazing was shown to be of minor importance for the phytoplankton periodicity.