Phosphorus addition reverses the positive effect of zebra mussels (Dreissena polymorpha) on the toxic cyanobacterium, Microcystis aeruginosa
| Autor: | Jeffrey D. White, Geoffrey Paul Horst, Stephen K. Hamilton, Orlando Sarnelle |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Microcystis
Environmental Engineering Biological Availability chemistry.chemical_element Cyanobacteria Algal bloom Dreissena Animal science Botany Animals Microcystis aeruginosa Trophic state index Waste Management and Disposal Ecosystem Water Science and Technology Civil and Structural Engineering biology Ecological Modeling Phosphorus Eutrophication biology.organism_classification Pollution Lakes chemistry Zebra mussel |
| Zdroj: | Water Research. 46:3471-3478 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/j.watres.2012.03.050 |
| Popis: | We tested the hypothesis that zebra mussels ( Dreissena polymorpha ) have positive effects on the toxin-producing cyanobacterium, Microcystis aeruginosa , at low phosphorus (P) concentrations, but negative effects on M. aeruginosa at high P, with a large-scale enclosure experiment in an oligotrophic lake. After three weeks, mussels had a significantly positive effect on M. aeruginosa at ambient P (total phosphorus, TP ∼10 μg L −1 ), and a significantly negative effect at high P (simulating a TP of ∼40 μg L −1 in lakes). Positive and negative effects were strong and very similar in magnitude. Thus, we were able to ameliorate a negative effect of Dreissena invasion on water quality (i.e., promotion of Microcystis ) by adding P to water from an oligotrophic lake. Our results are congruent with many field observations of Microcystis response to Dreissena invasion across ecosystems of varying P availability. |
| Databáze: | OpenAIRE |
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