Species point records from 1982-83 Bullimore Skomer sublittoral monitoring

A simple, cheap, system has been designed and built which facilitates underwater stereophotography with a single Nikonos camera and standard lens. A monitoring station on the north-east coast of Skomer Island (Dyfed, Wales) with permanent sites at 10, 20 and 25 m below Chart Datum was established during the spring of 1982. The four sites have been stereophotographically sampled at intervals since July 1982. The epibenthic communities present at the sites are briefly described and major changes between 1982 and 1983 documented. The limitations of the stereophotographic system and other techniques employed are identified and recommendations made for improvements.本研究设计并搭建了一套简易低成本的系统，可配合单台尼康诺斯（Nikonos）相机及标准镜头开展水下立体摄影工作。1982年春季，研究团队在威尔士戴费德（Dyfed）郡斯科默岛（Skomer Island）东北海岸设立了一处监测站，该站配有位于海图基准面以下10米、20米及25米的永久采样点位。自1982年7月起，研究人员已对这四个采样点位开展间断性的立体摄影采样工作。本研究对各点位现存的底表生物群落（epibenthic communities）进行了简要描述，并记录了1982年至1983年间发生的主要群落变化。此外，本研究明确了所使用的立体摄影系统及其他技术手段的局限性，并提出了相应的改进建议。