Biología y Conservación de Vertebrados, Inst. de Ecología A.C, Carretera Antigua a Coatepec 351 Congregación El Haya, Xalapa, 091300, Veracruz, México.
Inst. de Ecología, Pesquerías y Oceanografía del Golfo de México, Univ. Autónoma de Campeche, Av. Héroe de Nacozari 280, Campeche, 24079, México.
Sci Rep. 2024 Oct 23;14(1):25084. doi: 10.1038/s41598-024-77223-x.
Even though the use of organochlorine pesticides has been prohibited since the last century their presence is still being recorded around the world. In the upper La Antigua watershed, Veracruz, Mexico we have reported concentrations of these contaminants in different compartments of the riverine ecosystems. This is of relevance due to their potential disruptive endocrine effect on the vertebrates drinking the water or feeding in the riverine area. In this study we evaluated concentrations of organochlorine pesticides (OCPs) in streams running throughout mountain cloud forest and two different types of land use, pasture lands and coffee plantations. Water and periphyton samples were collected during the wet and the dry seasons from streams located in independent micro-basins. Spatial explicit analyzes show that the concentrations measured are independent of the distribution of the streams in the geographical area sampled. However seasonal differences were found during the dry season in the water and during the rainy season in periphyton. While OCPs in water support the idea that micro-basins can be used as independent monitoring units, OCPs in periphyton can be indicators of the effect of different land use. Some concentrations of all the OCPs registered had values above the limits for tap water.
尽管上个世纪已经禁止使用有机氯农药，但它们在世界各地仍有存在。在墨西哥韦拉克鲁斯州上拉安提瓜流域，我们已经报告了这些污染物在河流生态系统不同部分的浓度。这是很重要的，因为它们对饮用河水或在河流地区觅食的脊椎动物可能具有潜在的内分泌干扰作用。在这项研究中，我们评估了流经山地云雾林以及两种不同土地利用类型（牧场和咖啡种植园）的溪流中的有机氯农药（OCPs）浓度。在独立的小流域中，我们在雨季和旱季从溪流中采集了水和周丛生物样本。空间明确分析表明，所测量的浓度与采样地理区域中溪流的分布无关。然而，在旱季的水中和雨季的周丛生物中都发现了季节性差异。虽然水中的 OCPs 支持小流域可以用作独立监测单元的观点，但周丛生物中的 OCPs 可以作为不同土地利用影响的指标。所有登记的 OCPs 的一些浓度值都超过了自来水的限量。
