The “Rade de Cherbourg” (RdC, Cotentin) hosts the only marine salmon fish farm along the French coasts. High hydrodynamic regime would limit, there, organic matter (OM) accumulation directly under the cages, and enhance the transport of OM in the surrounding of the cages. This study was aiming at (1) monitoring the impact of a salmon fish farm on ecological quality statuses (EcoQs) of the RdC based on a benthic foraminiferal biotic index, (2) comparing EcoQs assessment results between foraminifera and macrofauna, and (3) in fine assessing the potential for benthic foraminifera to become an alternate biological quality element. In 2014 and 2015, bottom sediments of the RdC were sampled at 13 stations under and outside the farm for sedimentary (grain size and OM), and living foraminiferal and macrofaunal analyses. For benthic foraminifera, Exp(H’_bc) was used to determine EcoQs, while H’, AMBI and BO2A indices were used for benthic macrofauna. Rank-frequency distributions (RFDs) were calculated for both groups. Ecological quality statuses based on foraminifera and macrofauna indicated a moderate degradation of the environmental conditions, shifting from excellent outside the farm to poor under the cages for foraminifera and from excellent to moderate for macrofauna. This study showed that benthic foraminifera are as reliable as macrofauna to assess EcoQs in the RdC. It offers interesting perspectives to monitor the health of marine systems based on benthic foraminifera. Furthermore, results obtained with RFDs suggested that this approach should be considered in the assessment of the good environmental status within the European marine strategic framework directive. Finally, diversity proved to be efficient in monitoring the health of the RdC, suggesting that it should not be set aside for the benefit of sensitivity-based indices.

“瑟堡街（Rade de Cherbourg）”（位于Cotentin的RdC）拥有法国沿岸唯一的海水鲑鱼养殖场。高水动力状态会限制网箱正下方的有机质（OM）积累，并增强网箱周围网箱中OM的运输。这项研究旨在（1）根据底栖有孔虫生物指数监测鲑鱼养殖场对RdC的生态质量状况（EcoQs）的影响；（2）比较有孔虫和大型动物之间的EcoQs评估结果，以及（3）很好评估底栖有孔虫成为替代生物质量要素的潜力。2014年和2015年，在农场内外的13个站点采样了RdC的底部沉积物，以进行沉积（粒度和OM）沉积以及有孔虫和大型动物活体分析。对于底栖有孔虫，Exp（_H'bc）用来确定EcoQs，而H'，AMBI和BO2A指数用于底栖大型动物。计算两组的秩频分布（RFD）。以有孔虫和大型动物为基础的生态质量状况表明环境条件出现了中等程度的退化，有孔虫从农场外的优良环境转变为网箱下的恶劣环境，大型动物从优良变为中度。这项研究表明，底栖有孔虫与大型动物一样，可可靠地评估RdC中的EcoQ。它提供了有趣的观点来监视基于底栖有孔虫的海洋系统的健康状况。此外，通过RFD获得的结果表明，在评估欧洲海洋战略框架指令内的良好环境状况时应考虑采用这种方法。最后，