Document Detail

Ecotoxicological effects of rice field waters on selected planktonic species: comparison between conventional and organic farming.
MedLine Citation:
PMID:  20721691     Owner:  NLM     Status:  In-Process    
The aim of this study was to assess the ecotoxicological effects of water coming from untreated organic and conventional rice field production areas in the Ebro Delta (Catalonia, Spain) treated with the herbicides oxadiazon, benzofenap, clomazone and bensulfuron-methyl and the fungicides carbendazim, tricyclazole and flusilazole. Irrigation and drainage channels of the study locations were also included to account for potential toxic effects of water coming in and out of the studied rice fields. Toxicity tests included four species (Pseudokirchneriella subcapitata, Desmodesmus subcapitatus, Chlorella vulgaris and Daphnia magna), three endpoints (microalgae growth, D. magna mortality and feeding rates), and two trophic levels: primary producers (microalgae) and grazers (D. magna). Pesticides in water were analyzed by solid phase extraction-liquid chromatography-electrospray-tandem mass spectrometry (LC-ESI-MS/MS). Negative effects on algae growth and D. magna feeding rates were detected mainly after application of herbicides and fungicides, respectively, in the conventional rice field. Results indicated that most of the observed negative effects in microalgae and D. magna were explained by the presence of herbicides and fungicides. The above mentioned analyses also denoted an inverse relationship between phytoplankton biomass measured as chlorophyll a and herbicides. In summary, this study indicates that in real field situations low to moderate levels of herbicides and fungicides have negative impacts to planktonic organisms and these effects seem to be short-lived.
Andrea Suárez-Serrano; Carles Ibáñez; Silvia Lacorte; Carlos Barata
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-08-19
Journal Detail:
Title:  Ecotoxicology (London, England)     Volume:  19     ISSN:  1573-3017     ISO Abbreviation:  Ecotoxicology     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-11-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9885956     Medline TA:  Ecotoxicology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1523-35     Citation Subset:  IM    
IRTA-Aquatic Ecosystems, Sant Carles de la Ràpita, 43540 Tarragona, Catalonia, Spain.
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