Facultad de Ciencias de La Tierra Y Agua, Universidad Regional Amazónica Ikiam, Km 7 Vía Muyuna, Tena, Napo, Ecuador.
Laboratorio Nacional de Referencia del Agua, Universidad Regional Amazónica Ikiam, Km 7 Vía Muyuna, Tena, Napo, Ecuador.
Bull Environ Contam Toxicol. 2021 Jul;107(1):52-61. doi: 10.1007/s00128-020-03089-0. Epub 2021 Jan 25.
We assessed the quality of Andes-Amazonia streams in Ecuador impacted by gold mining (GM), discharges from inefficient sewage network in urban areas (UA), wastes from fish farming (FF) and from non-functional landfill (LF) and other few threats (FT). We selected three lines of evidence (LOE) that were used separately and integrated into a index: water quality (WQI) and macroinvertebrate community (AAMBI) indices and phytotoxicity tests. Streams affected by UA and LF had the lowest scores to WQI and phytotoxicity, and by GM had the lowest scores to AAMBI. Macroinvertebrate absence in GM should be considered as a warning signal of long-term mining impacts in the area. The integrated LOE index showed that sites with identified threats had 30%-53% stream quality decline compared to FT sites. The use of the selected LOE seems to be a useful tools for long-term monitoring and evaluation of this sensitive aquatic ecosystem.
我们评估了厄瓜多尔受金矿开采（GM）、城市低效污水管网排放（UA）、水产养殖废物（FF）和非功能垃圾填埋场（LF）以及其他一些威胁（FT）影响的安第斯-亚马逊河流域的水质。我们选择了三条证据线（LOE），分别使用并整合到一个指数中：水质（WQI）和大型底栖无脊椎动物群落（AAMBI）指数以及植物毒性测试。受 UA 和 LF 影响的溪流在 WQI 和植物毒性方面得分最低，而受 GM 影响的溪流在 AAMBI 方面得分最低。GM 中大型底栖无脊椎动物的缺失应被视为该地区长期采矿影响的警告信号。综合 LOE 指数表明，与 FT 点相比，有明确威胁的地点的溪流质量下降了 30%-53%。所选 LOE 的使用似乎是对这个敏感水生生态系统进行长期监测和评估的有用工具。
