The Effects of an Herbicide and Antibiotic Mixture on Aquatic Primary Producers and Grazers
| Autor: | Madison R Kelly, Risa A. Cohen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Health Toxicology and Mutagenesis Daphnia magna Chlorella 010501 environmental sciences Toxicology 01 natural sciences Zooplankton 03 medical and health sciences chemistry.chemical_compound Aquatic plant Microalgae Animals Araceae Ecotoxicology Atrazine 0105 earth and related environmental sciences biology Herbicides Aquatic ecosystem fungi General Medicine biology.organism_classification Pollution Anti-Bacterial Agents Macrophyte 030104 developmental biology Daphnia chemistry Environmental chemistry Microcosm Water Pollutants Chemical |
| Zdroj: | Bulletin of Environmental Contamination and Toxicology. 101:556-561 |
| ISSN: | 1432-0800 0007-4861 |
| DOI: | 10.1007/s00128-018-2451-0 |
| Popis: | Widespread use of agrochemicals increases their likelihood of entering aquatic systems in mixture. Despite different modes of action, atrazine (herbicide) and tetracycline (antibiotic) adversely affect non-target photosynthetic organisms individually, but the effects of simultaneous exposure to both contaminants are untested. We created microcosms containing microalgae (Chlorella sp.), floating macrophytes (Lemna minor), and a zooplankton grazer (Daphnia magna). Microcosms were exposed to environmentally relevant concentrations of atrazine and tetracycline, alone and together, for 10 days. Atrazine decreased Chlorella sp. abundance, but not enough to reduce food availability to D. magna whose reproduction and mortality were unaffected. In contrast, tetracycline and atrazine appeared to have additive effects on L. minor abundance and growth inhibition. These additive adverse effects suggest increased potential for L. minor population decline over the long term, and potential for altered species interactions in aquatic systems receiving agricultural runoff. |
| Databáze: | OpenAIRE |
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