AI Article Synopsis
- The study examined the impact of pesticides on stream macroinvertebrates in a rural area of Central Germany by using Chemcatcher® passive samplers to measure pesticide levels.
- It found that sites contaminated with the banned insecticide Carbofuran had fewer pesticide-sensitive macroinvertebrate species and slower leaf litter breakdown rates.
- The research supports the validity of using Chemcatcher® passive samplers along with the SPEARpesticides indicator system to effectively assess pesticide pollution and its ecological effects in aquatic environments.
Article Abstract
Pesticides negatively affect biodiversity and ecosystem function in aquatic environments. In the present study, we investigated the effects of pesticides on stream macroinvertebrates at 19 sites in a rural area dominated by forest cover and arable land in Central Germany. Pesticide exposure was quantified with Chemcatcher® passive samplers equipped with a diffusion-limiting membrane. Ecological effects on macroinvertebrate communities and on the ecosystem function detritus breakdown were identified using the indicator system SPEARpesticides and the leaf litter degradation rates, respectively. A decrease in the abundance of pesticide-vulnerable taxa and a reduction in leaf litter decomposition rates were observed at sites contaminated with the banned insecticide Carbofuran (Toxic Units≥-2.8), confirming the effect thresholds from previous studies. The results show that Chemcatcher® passive samplers with a diffusion-limiting membrane reliably detect ecologically relevant pesticide pollution, and we suggest Chemcatcher® passive samplers and SPEARpesticides as a promising combination to assess pesticide exposure and effects in rivers and streams.
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| http://dx.doi.org/10.1016/j.scitotenv.2015.07.012 | DOI Listing |
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