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首页> 外文期刊>ICES Journal of Marine Science >Acoustic seabed classification of marine habitats: studies in the western coastal-shelf area of Portugal
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Acoustic seabed classification of marine habitats: studies in the western coastal-shelf area of Portugal

机译：海洋栖息地的声海床分类：在葡萄牙西部沿海陆架地区的研究

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摘要

Two single-beam, seabed-classification systems, QIC VIEW Series Ⅳ and QIC VIEW Series Ⅴ, were used to identify and map biosedimentary gradients in a mid-shelf area off Western Portugal. The survey area has a moderate slope, a depth ranging from 30 to 90m along a 3.5-km axis perpendicular to the shoreline, and is characterized by smooth sedimentary and biological gradients. Ground truth for sediment grain size and macrofaunal communities was based on grab sampling at 20 sites. The sedimentary and biological data were analysed using classification and ordination techniques. The acoustic data were analysed with QTC IMPACT software and classified into acoustic classes. The affinity groups obtained in each data set were mapped using a Geographic Information System. All showed good agreement and identified prevailing gradients along a northwest-southeast direction. Three acoustic classes were identified, corresponding to the predominant sediment types, namely fine sand with low silt and clay content, silty, very fine sand, and mud. A close relationship with benthic communities was also verified, although less marked because benthic communities continuously change along the northwest-southeast gradient. Overall, the acoustic system coupled with ground-truthing data was able to discriminate and characterize the various benthic biotopes in the survey area.
机译：QIC VIEW系列Ⅳ和QIC VIEW系列Ⅴ两个单光束海床分类系统用于在葡萄牙西部以外的中陆地区识别并绘制生物沉积梯度。调查区域的坡度适中，沿垂直于海岸线的3.5公里轴线的深度范围为30至90m，其特征是平滑的沉积和生物梯度。沉积物粒度和大型动物群落的地面真相是基于20个地点的抓取采样。使用分类和排序技术分析了沉积和生物学数据。使用QTC IMPACT软件分析声学数据，并将其分类为声学类别。使用地理信息系统映射每个数据集中获得的亲和力组。所有这些都显示出良好的一致性，并确定了西北-东南方向的主要梯度。根据主要的沉积物类型，确定了三种声学类别，即低粉尘和低粘土含量的细砂，粉质，极细砂和泥浆。与底栖动物群落的亲密关系也得到了证实，尽管由于底栖动物群落沿西北-东南梯度不断变化而变化不大。总体而言，声学系统与地面真相数据相结合，能够区分和表征调查区域内的各种底栖生物群落。

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