Pesticide and trace element bioaccumulation in wild owls in Brazil
| Autor: | Marcelo Menezes Ferretto, Charise Dallazem Bertol, Maria Tereza Friedrich, Laura Beatriz Rodrigues, Gabriela Elisa Dal Pizzol, Luciana Grazziotin Rossato-Grando, Jonas Claudiomar Kilpp, Enzo Mistura, Elinton Rezende, Arthur Nery da Silva, Vitória Aquino Rosano |
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| Rok vydání: | 2020 |
| Předmět: |
Health
Toxicology and Mutagenesis Population 010501 environmental sciences Biology 01 natural sciences Food chain Environmental Chemistry Ecotoxicology Animals Pesticides education Ecosystem 0105 earth and related environmental sciences education.field_of_study Pesticide residue Trace element General Medicine Pesticide Strigiformes Pollution Bioaccumulation Trace Elements Lead Environmental chemistry Bioindicator Brazil Environmental Monitoring |
| Zdroj: | Environmental science and pollution research international. 28(28) |
| ISSN: | 1614-7499 |
| Popis: | Owls are outstanding environmental quality bioindicators due to their position at the top of the food chain and susceptibility to pollutant accumulation. Exposure to chemical contaminants is often a risk for these animals. Moreover, studies addressing the bioaccumulation of trace elements and pesticide residues in tropical nocturnal raptor species are scarce. We analyzed the 26 organs (heart, liver, and kidney) of Tyto furcata (n=3), Megascops spp. (n=5), Pulsatrix koeniswaldiana (n=1), and Asio stygius (n=1) carcasses, collected from June 2018 to May 2019 in the Southern region of Brazil. The original vegetation consisted of areas of Araucaria forests and grassy-woody steppes with gallery forests, which were greatly modified by the introduction of agriculture. In four animals and eight organs, the pesticides abamectin, atrazine, chlorpyrifos-ethyl, and diurom were analyzed through high-performance liquid chromatography coupled with a mass detector. In six animals and eighteen organs, the trace elements cadmium, lead, chromium, and nickel were identified via atomic absorption spectrophotometry. Chlorpyrifos-ethyl was detected in the livers of the genus Megascops. Chromium was found at high concentrations in all matrices analyzed for this trace element. Moreover, P. koeniswaldiana presented lead levels indicative of high exposure. The bioaccumulation of these toxics in owls described here can impact the population levels of these species, impact on its ecological function, and consequently unbalance the ecosystem. Moreover, owls are considered bioindicators; therefore, the occurrence of bioaccumulation indirectly gives us information about the quality of the environment. |
| Databáze: | OpenAIRE |
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