Competition between benthic cyanobacteria and ... - Inter Research
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Competition between benthic cyanobacteria and ... - Inter Research
Competition between benthic cyanobacteria and diatoms as influenced by different grain sizes and temperatures Frank W a t e r m a n n l . * , Helmut Hillebrand2, Gisela ~ e r d e s 'Wolfgang , E. rum be in^, Ulrich sommer2 'Institute for Chemistry and Biology of the Marine Environment, Marine Station. Schleusenstr. 1. 26382 Wilhelmshaven. Germany 'Institut fiir Meereskunde, Abteilung Meeresbotanik, Diisternbrooker Weg 20, 24105 Kiel. Germany 3Geornicrobiology, Institute for Chemistry and Biology of the Marine Environment (ICBM), Car1 von Ossietzky University, Box 2503,26111 Oldenburg, Germany
ABSTRACT An experimental laboratory set-up was used to study the influence of different grain size compositions and temperatures on the growth of b e n t h ~ ccyanobacteria and diatoms, and on the competition between these 2 groups. Monospecific cultures of 3 species of cyanobacteria (Merismopedia punctata, Microcoleus chthonoplastes, Oscillatoria limosa), and of 2 species of benthic diatoms (Phaeodactylum Oicornutum and Nitzschia sp.) were used. The organisms were cultured in 100 m1 flasks filled with medium and 3 different kinds of sediment. (1)Sand (fine sand, 63 to 200 pm), (2)Mud-I (mixed fine sand and mud
