A Field Study to Investigate Environmental Factors that Could Effect Microcystin Synthesis of a Microcystis Population in the Bautzen Reservoir
✍ Scribed by Dirk Jungmann; Kai-Uwe Ludwichowski; Veronika Faltin; Jurgen Benndorf
- Book ID
- 102870174
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 637 KB
- Volume
- 81
- Category
- Article
- ISSN
- 1434-2944
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✦ Synopsis
Toxicity of Microcystis blooms to warm-blooded animals generated by microcystins has bew reported world wide. The ecological relevance of microcystin production for cyanobacteria ren1;iiiis unknown. The microcystin concentration in Microcysfis blooms occurring in the Bautzen reservoir W;IS investigated. The microcystin content of samples were determined by HPLC and ranged from undctcctabel to 14.7 pg mg-'. Various chemical and physical parameters were monitored at the same tiinc ;is Microcystis sampling, however, there was no correlation between these parameters and microcyst ill dynamics. The spatial distribution of microcystin in the Microcystis population was investigated oiicc and showed no difference between samples taken at five stations. The microcystin concentration i n tlic cell free water from the reservoir was below the detection threshold (< 1 pg L-I). Size dependent Fr;ictions of the Microcystis population analyzed for microcystin concentration correlated with colony sim. In the small fraction (>30 <66 pm) microcystin was not detected. In the medium fraction (>6h < 100 pm) lower microcystin concentrations were detected than in large fraction (> 100 pm) in whic.11 the highest microcystin concentrations were found.