MED-Mediterranean Institute for Agriculture, Environment and Development & CHANGE-Global Change and Sustainability Institute, LabOr-Laboratory of Ornithology, IIFA - Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554, Évora, Portugal.
Area of Toxicology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30100, Murcia, Spain.
Bull Environ Contam Toxicol. 2022 Sep;109(3):436-442. doi: 10.1007/s00128-022-03576-6. Epub 2022 Jul 24.
We evaluated feathers as a non-destructive biomonitoring tool documenting organochlorine pesticides (OCP) in liver and checked possible trends in pesticide use in two areas based on OCP concentrations in barn owls (Tyto alba). We measured the concentrations of 16 OCP in 15 primary feathers and 15 livers from barn owl carcasses collected on roadsides in Tagus Valley and Évora regions, south Portugal. Total OCP mean concentration was 8 120 ng g in feathers and 178 ng g in livers. All compounds were detected in feathers while in livers δ-HCH, endosulfan sulphate, p,p'-DDT and p,p'-DDD were not detected. The high β-HCH and heptachlor concentrations in feathers most likely derived from external endogenous contamination. P,p'-DDE was the OCP with the highest hepatic concentration. Both matrices indicated an exposure to recently released heptachlor. The differing OCP concentrations between Tagus Valley and Évora seem to reflect differences in land-use and pesticide use histories of the two locations, and/or faster degradation of OCP in the Tagus area.
我们评估了羽毛作为一种非破坏性生物监测工具的作用，记录了肝脏中的有机氯农药（OCP），并根据Barn Owl（Tyto alba）肝脏中的OCP 浓度，检查了两个地区农药使用的可能趋势。我们测量了 15 只 Barn Owl 尸体的 15 根主羽毛和 15 个肝脏中的 16 种 OCP 浓度，这些尸体是在葡萄牙南部塔古斯河谷和埃武拉地区的路边收集的。羽毛中的总 OCP 平均浓度为 8120ng/g，肝脏中的总 OCP 平均浓度为 178ng/g。所有化合物都在羽毛中检测到，而在肝脏中未检测到 δ-HCH、硫丹硫酸盐、p,p'-DDT 和 p,p'-DDD。羽毛中高浓度的β-HCH 和七氯很可能来自外部内源性污染。P,p'-DDE 是肝脏中 OCP 浓度最高的一种。这两种基质都表明接触到了最近释放的七氯。塔古斯河谷和埃武拉之间的 OCP 浓度差异似乎反映了这两个地区土地利用和农药使用历史的差异，以及/或者塔古斯地区 OCP 的降解速度更快。
