Restoring fish ecological quality in estuaries: Implication of interactive and cumulative effects among anthropogenic stressors.
Restoring fish ecological quality in estuaries: Implication of interactive and cumulative effects among anthropogenic stressors.
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DOI：
10.1016/j.scitotenv.2015.10.068
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发表时间：
2016-01
期刊：
影响因子：
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通讯作者：
N. Teichert;Á. Borja;G. Chust;A. Uriarte;M. Lepage
中科院分区：
文献类型：
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作者：
N. Teichert;Á. Borja;G. Chust;A. Uriarte;M. Lepage
河口受到多种人为胁迫，这些胁迫具有累加、拮抗或协同效应。目前的挑战包括利用大型生物监测调查数据库（例如欧洲水框架指令）帮助环境管理人员确定恢复措施的优先次序。本研究调查了9种应激源对东北大西洋国家90个河口鱼类生态状况的影响。我们使用一个随机森林模型：1）检测的主导压力及其非线性效应; 2）评估预期的生态效益，减少压力的压力;和3）调查压力之间的相互作用。结果表明，最大的恢复效益时，预计减轻水污染和氧气消耗。非加性效应占压力源之间成对相互作用的一半，拮抗作用是最常见的。疏浚沉积物，流量的变化和氧气消耗主要涉及非加性的相互作用，而其余的压力往往表现出加性的影响。交互影响的流行反映了河口管理的复杂情况，因此，我们提出了一个逐步恢复计划，重点是减轻压力，提供最大的恢复效益下的多压力背景下。
Estuaries are subjected to multiple anthropogenic stressors, which have additive, antagonistic or synergistic effects. Current challenges include the use of large databases of biological monitoring surveys (e.g. the European Water Framework Directive) to help environmental managers prioritizing restoration measures. This study investigated the impact of nine stressor categories on the fish ecological status derived from 90 estuaries of the North East Atlantic countries. We used a random forest model to: 1) detect the dominant stressors and their non-linear effects; 2) evaluate the ecological benefits expected from reducing pressure from stressors; and 3) investigate the interactions among stressors. Results showed that largest restoration benefits were expected when mitigating water pollution and oxygen depletion. Non-additive effects represented half of pairwise interactions among stressors, and antagonisms were the most common. Dredged sediments, flow changes and oxygen depletion were predominantly implicated in non-additive interactions, whereas the remainder stressors often showed additive impacts. The prevalence of interactive impacts reflects a complex scenario for estuaries management; hence, we proposed a step-by-step restoration scheme focusing on the mitigation of stressors providing the maximum of restoration benefits under a multi-stress context.