University of 8 May 1945 Guelma, Faculty SNV-STU, Laboratoire de Biologie, Eau et Environnement, Guelma, Algeria.
Universidad Católica de Temuco, Facultad de Recursos Naturales, Departamento de Ciencias Biológicas y Químicas, Temuco, Chile.
Braz J Biol. 2022 Jan 10;84:e251566. doi: 10.1590/1519-6984.251566. eCollection 2022.
The Seybouse is the second largest river basin in Algeria, hosting an important biodiversity and providing various ecosystem services. This watershed is highly influenced by agricultural and industrial activities, which threaten its biodiversity and ecosystem integrity. The use of benthic macroinvertebrates as biological indicators has a long tradition in developed countries and integrated into all assessments of the ecological quality of river systems. However, the macroinvertebrates of many North African regions are still not well studied, including those of the Seybouse river. The aim of this study is to assess the inventory and ecological role of benthic macroinvertebrates in inland waters of the Seybouse River and determine the impact of pollution on their spatial distributions. We sampled the benthic macrofauna of Wadi Seybouse and its affluents using regular surveys in three sites, of which one was in the upper Seybouse Bouhamdane in Medjez Amar and two in the middle Seybouse. Between December 2019 and May 2020, 10 physico-chemical parameters (pH, EC, OD, water speed, NO3, Salinity, NO2, MES, turbidity, depth) were measured in order to establish a health state diagnosis of these aquatic ecosystems. The complementary biological approach by the analysis of populations of macroinvertebrates identified 7482 individuals and 40 taxa divided into five classes: Crustaceans which were the most dominant, insects with the main orders (Ephemeroptera, Diptera, Trichoptera, Heteroptera and Odonata), Molluscs, Nematodes and Annelids. The physico-chemical analyzes and the application of the organic pollution indices indicated a strong to excessive pollution for all sites, especially in Seybouse upstream.
塞布河是阿尔及利亚的第二大河域，拥有重要的生物多样性，并提供各种生态系统服务。该流域深受农业和工业活动的影响，这些活动威胁着其生物多样性和生态系统完整性。使用底栖大型无脊椎动物作为生物指标在发达国家有着悠久的传统，并被纳入所有对河流系统生态质量的评估中。然而，包括塞布河在内的许多北非地区的大型无脊椎动物仍未得到充分研究。本研究旨在评估塞布河内陆水域底栖大型无脊椎动物的物种名录和生态作用，并确定污染对其空间分布的影响。我们使用常规调查在三个地点（其中一个位于 Medjez Amar 的 Seybouse Bouhamdane 上游，两个位于中游）对塞布河及其支流的底栖大型动物进行了采样。2019 年 12 月至 2020 年 5 月，测量了 10 个物理化学参数（pH、EC、OD、水流速度、NO3、盐度、NO2、MES、浊度、水深），以建立这些水生态系统的健康状况诊断。通过对大型无脊椎动物种群的分析，补充了生物学方法，共鉴定出 7482 个个体和 40 个分类单元，分为五类：甲壳类动物是最占优势的，主要的昆虫目有（蜉蝣目、双翅目、毛翅目、半翅目和蜻蜓目）、软体动物、线虫和环节动物。物理化学分析和有机污染指数的应用表明，所有地点的污染程度都很强，尤其是塞布河上游。
