| Abstrakt: |
Investigations of individual cultures and cocultures were conducted with Cyclotella sp., Chlorella vulgaris, and Microcystis aeruginosa. An appropriate culture medium for all the three species of algae was selected (50% of BGl l+ 50% Dl medium). The growth characteristics of each species were studied, and their competitive advantages were discussed. The results revealed that, when separately cultured, the biomass of M aeruginosa was the greatest, with C. vulgaris being second. When Cyclotella sp. was cultured together with C. vulgaris or M aeruginosa it transitioned to the decline phase earlier than that when it was cultured in isolation, and was at a competitive disadvantage. During the initial eight days of the C. vulgaris and M aeruginosa pairing, the cell density of C. vulgaris was higher than that of M aeruginosa; however, M aeruginosa subsequently became the dominant species. When the three species of algae were co-cultured, M aeruginosa eventually attained the growth advantage. The competition inhibition of the three algae, ranging from highest to lowest was: Cyclotella sp., C. vulgaris, and M aeruginosa. [ABSTRACT FROM AUTHOR] |
