National School of Marine Sciences and Coastal Management, Campus Universitaire de Dély Ibrahim Bois des Cars, .B.P 19, Dély Ibrahim, Alger, 16320, Algeria.
Environ Sci Pollut Res Int. 2020 Dec;27(34):42670-42684. doi: 10.1007/s11356-020-10123-5. Epub 2020 Jul 26.
Coastal areas are frequently influenced by direct and/or indirect multiple anthropogenic pressures, which impacts marine life. Those perturbations may act in a heterogeneous way with a different intensity and are related to the complexity of coastal ecosystems. To visualize all these interactions at a local scale, a methodology inspired from many researches has been implemented in order to search, identify, and classify coastal ecosystems according to their sensitivity to anthropic pressure exerted by coastal cities. Thus, producing vulnerability maps will be essential tools to local coastal managers. We have applied this methodology on five coastal municipalities in Algiers. Firstly, the environmental sensitivity of coastal ecosystems was assessed by analyzing these four sub-indices: biological sensitivity, geomorphological sensitivity, hydrodynamic characteristics, and pollution intensity. Secondly, an assessment of the anthropogenic pressures presented by each municipality was carried out. Five sub-indexes have been taken into consideration when conducting this assessment: human activities, infrastructures, vectors of pollution, urbanization, and regulatory protection. Then, vulnerability maps were produced by the overlapping of sensitivity and anthropic pressure maps. The results assessed for the environmental vulnerability indicated that most areas are moderately to highly vulnerable, especially in the municipalities of Bab El Oued, Rais Hamidou, and Ain Bénian. The analysis of the obtained results shows the potential applicability of this methodology because they accurately reflect the reality. Therefore, these results can be useful to decision-makers by providing them with a relatively rational decision-making tool to prioritize future management and planning efforts.
沿海地区经常受到直接和/或间接的多种人为压力的影响，这些压力会影响海洋生物。这些干扰可能以不同的强度和方式发生，与沿海生态系统的复杂性有关。为了在局部尺度上可视化所有这些相互作用，我们借鉴了许多研究成果，实施了一种方法，根据沿海城市施加的人为压力对沿海生态系统进行搜索、识别和分类。因此，生成脆弱性图将是当地沿海管理者的重要工具。我们已经将这种方法应用于阿尔及尔的五个沿海城市。首先，通过分析生物敏感性、地貌敏感性、水动力特征和污染强度这四个子指数，评估了沿海生态系统的环境敏感性。其次，对每个城市存在的人为压力进行了评估。在进行评估时，考虑了五个子指数：人类活动、基础设施、污染载体、城市化和监管保护。然后，通过重叠敏感性和人为压力图来生成脆弱性图。对环境脆弱性的评估结果表明，大多数地区属于中度到高度脆弱，特别是在 Bab El Oued、Rais Hamidou 和 Ain Bénian 这三个城市。对获得的结果进行分析表明，这种方法具有潜在的适用性，因为它们准确地反映了现实。因此，这些结果可以为决策者提供一个相对合理的决策工具，帮助他们优先考虑未来的管理和规划工作。
