Insecticide residues in bats along a land use-gradient dominated by cotton cultivation in northern Benin, West Africa
Autor: | Bruno Agossou Djossa, Marit Kolb, Jakob Fahr, Müfit Bahadir, Christin Stechert |
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Rok vydání: | 2014 |
Předmět: |
Insecticides
Dichlorodiphenyl Dichloroethylene Health Toxicology and Mutagenesis Biomagnification Biology DDT chemistry.chemical_compound Chiroptera Animals Benin Environmental Chemistry Ecotoxicology Endosulfan Gossypium Pesticide residue business.industry Ecology Pesticide Residues Agriculture General Medicine Pesticide Pollution chemistry Agronomy Chlorpyrifos business Lindane Hexachlorocyclohexane Environmental Monitoring |
Zdroj: | Environmental Science and Pollution Research. 21:8812-8821 |
ISSN: | 1614-7499 0944-1344 |
Popis: | Many regions in Africa are currently being converted from subsistence to cash crop farming such as cotton. Agricultural intensification is usually accompanied by increased use of pesticides, which can have an impact on non-target organisms. Bats are particularly sensitive to insecticide loads while providing substantial ecosystem services as predators of herbivorous insects. In this study, pesticide residues in bats in a landscape in northern Benin were investigated, which spanned a land use gradient from an agricultural zone dominated by cotton farms, through a buffer zone, and into a national park. Insecticides used in cotton cultivation, such as endosulfan, chlorpyrifos, flubendiamide, and spirotetramat, as well as persistent insecticides such as bis(4-chlorophenyl)-1,1,1-trichloroethane (DDT), lindane, and aldrine, were analysed. Insecticide residues detected in bats comprised DDT, endosulfan, and their corresponding transformation products. Maximum concentrations in the sampled bats were 11.2 mg/kg lipid of p,p'-DDE (median: 0.0136 mg/kg lipid) and 0.797 mg/kg lipid of β-endosulfan (median: below detection limit [DL]). While insecticide concentrations were below lethal concentrations our data suggest that DDT had probably been recently used in the study region, and larger scale use would pose an increased risk for bat populations due to the high biomagnification of DDT. |
Databáze: | OpenAIRE |
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