Toxic risk associated with sporadic occurrences of Microcystis aeruginosa blooms from tidal rivers in marine and estuarine ecosystems and its impact on Artemia franciscana nauplii populations
| Autor: | M.C. Bartolomé, A. D’ors, S. Sánchez-Fortún |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Cyanobacteria
Environmental Engineering Microcystis Microcystins Health Toxicology and Mutagenesis Harmful Algal Bloom Fresh Water Biology Algal bloom Zooplankton Risk Assessment Water Pollution Chemical Environmental Chemistry Animals Microcystis aeruginosa Ecosystem Seawater Population Density geography geography.geographical_feature_category Ecology Public Health Environmental and Occupational Health Estuary General Medicine General Chemistry biology.organism_classification Pollution Equivalent concentration Marine Toxins Artemia Bloom Water Microbiology Water Pollutants Chemical |
| Zdroj: | Chemosphere. 90(7) |
| ISSN: | 1879-1298 |
| Popis: | Microcystis aeruginosa is a species of freshwater cyanobacteria which can form harmful algal blooms in freshwater water bodies worldwide. However, in spite its sporadic occurrences for short periods of time in estuarine waters, their influence on zooplankton populations present in these ecosystems has not been extensively studied. In this work, Artemia franciscana was used as test organism model, studying mortality against several strains of M. aeruginosa with different degrees of toxigenicity, measuring whole-live cells and homogenate extracts. Results were compared with microcystin-LR equivalent content, measured by immunoassay. The results show that there were no significant differences between both exposure models (whole cells and extracts), and there are significant differences respect to the toxigenicity of cyanobacterial blooms depending of the M. aerugionosa strain involved in the process. Analysis of microcystin-LR equivalent concentration test immediately below the lowest significant concentration in all M. aerugionosa strains was used to determine the potential risk associated with the cell densities during a bloom. Comparison among the selected M. aerugionsa strains show that these factors have influence in the results obtained, and thus, several differences have been evidenced depending of the microcystin-LR equivalent production and the strain type involved. |
| Databáze: | OpenAIRE |
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