Responses of macroinvertebrate communities to pesticide application in irrigated rice fields

The ability to recover to original states after disturbances makes macroinvertebrates useful tools for assessing the impacts of pesticides. Many studies showed that direct exposure to pesticides decreases macroinvertebrate richness and alters their composition. The main objective of this study was t...

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Bibliographic Details
Published in:Environmental monitoring and assessment 2018-02, Vol.190 (2), p.74-13
Main Authors: Stenert, Cristina, de Mello, Íris C. M. F., Pires, Mateus M., Knauth, Débora S., Katayama, Naoki, Maltchik, Leonardo
Format: Article
Language:English
Subjects:
Abundance
Agricultural Irrigation
Animals
Atmospheric Protection/Air Quality Control/Air Pollution
Benzoates - analysis
Benzoates - toxicity
Collections
Communities
Community structure
Composition
Crop fields
Dynamics
Earth and Environmental Science
Ecology
Ecotoxicology
Environment
Environmental Management
Environmental monitoring
Environmental Monitoring - methods
Environmental science
Growing season
Herbicides
Herbicides - analysis
Herbicides - toxicity
Insecticides
Insecticides - analysis
Insecticides - toxicity
Invertebrates - drug effects
Isoxazoles - analysis
Isoxazoles - toxicity
Macroinvertebrates
Monitoring/Environmental Analysis
ortho-Aminobenzoates - analysis
ortho-Aminobenzoates - toxicity
Oryza
Oxazolidinones - analysis
Oxazolidinones - toxicity
Pesticide application
Pesticides
Ponds
Pyrimidines - analysis
Pyrimidines - toxicity
Recovery
Rice fields
Sodium
Zoobenthos
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Summary:The ability to recover to original states after disturbances makes macroinvertebrates useful tools for assessing the impacts of pesticides. Many studies showed that direct exposure to pesticides decreases macroinvertebrate richness and alters their composition. The main objective of this study was to assess recovery patterns in macroinvertebrate communities after pesticide application in irrigated rice fields. We analyzed short-term temporal dynamics of macroinvertebrate communities after application of the herbicides bispyribac-sodium and clomazone and the insecticide chlorantraniliprole, over the rice-growing season in southern Brazil. We selected three conventional rice fields and the recovery of macroinvertebrate communities was also compared with three adjacent natural ponds. The study was developed from November 2011 to February 2012 (rice-growing season). Five macroinvertebrate collections were carried out 3, 7, 14, 38, and 60 days after pesticide application (November 25). Rice fields showed lower richness and abundance than ponds in the period immediately after pesticide application, and recovery rates in the richness of macroinvertebrate communities were more conspicuous as pesticide residuals dissipated from the fields. Macroinvertebrate community structure in rice fields also became more similar to natural ponds as pesticide traces were scarcer. However, macroinvertebrate abundance patterns were not related to pesticide concentrations in the fields. Our results supported the general hypothesis on the negative effects of pesticide application on macroinvertebrate community in irrigated rice fields, although other environmental features (e.g., length of the flooded period) also contributed to explain temporal dynamics in the macroinvertebrate communities from irrigated rice fields.
ISSN:0167-6369
1573-2959
DOI:10.1007/s10661-017-6425-1