2017 Scottish Natural Heritage (SNH) Sound of Barra benthic camera survey

The primary aim of this benthic survey in the Sound of Barra, run by SNH and Marine Scotland Science (MSS) for SNH on the 11th - 12th May 2017 using MSS vessel MRV Alba na Mara (cruise 0717A), was to further establish and refine the distribution of biotopes including Annex 1 habitats within and out with the SAC boundary using quantitative drop-down camera and grab sampling. Dropdown video drifts were undertaken at 30 stations, largely along the eastern fringe of the Sound. Through the analysis of seabed video, the images were used to describe the nature of the seabed in terms of the physical structure and the species assemblages. Runs and run segments were assessed for the presence of protected features and other PMFs, as well as for the presence of species and habitats of recognised conservation importance. Runs traversing a sequence of habitats were split into corresponding segments. Species present were, as far as possible, identified and quantified using the semi-quantitative MNCR SACFOR scale and biotopes were allocated based on the physical and biological attributes. Grab sampling was also undertaken on this survey at 107 sites. This data is yet to be analysed and reported.

本次由苏格兰自然遗产保护局（SNH）与海洋苏格兰科学（MSS）共同执行的巴罗海峡底栖调查，旨在2017年5月11日至12日利用MSS船艇阿尔巴·纳·马拉号（航次0717A）进一步确立并细化生物群落的分布，包括SAC边界内外的附件1栖息地。调查在巴罗海峡东部边缘的30个站点进行了下拉视频漂移操作。通过对海底视频的分析，图像被用于描述海底的性质，包括物理结构和物种群落。对通过一系列栖息地的航迹及其段落进行了评估，以检查受保护特征和其他PMFs的存在，以及对已识别的具有保护重要性的物种和栖息地的存在。跨越一系列栖息地的航迹被分割成相应的段落。尽可能地对现有物种进行识别和量化，使用半定量MNCR SACFOR尺度，并根据物理和生物属性分配生物群落。此外，在107个地点进行了抓捕采样。这些数据尚未进行分析和报告。