Species point records from 1977 SWBSS Padstow sublittoral survey

The survey was planned in order to describe the range of sublittoral habitats and populations in the region of Padstow, to provide information for Underwater Conservation Year projects, and to give divers interested in natural history, the opportunity to take part in a field survey working with biologists involved in marine studies. 27 km of coastline including offshore rocks from Trevone Head to Port Issac were involved in the survey. Along most of the coast, a sand plain or gentle slope extended into shallow water at around 5 m. At headlands and offshore rocks, stable and often very broken rock substrates were present to 20 m and deeper. A distinct infralittoral fringe was present near to Chart Datum level followed by an upper infralittoral zone characterised by the presence of kelp forest which extended to only about 3 m. Algal populations were distinctly different in exposed and semi-exposed sites. The lower infralittoral zone dominated by foliaceous algae extended to 13 m and was followed by a circalittoral zone. Population types and richness is also discussed. Kellan Head is noted as the richest circalittoral site visited during the survey. 27 sites were surveyed. 99 species of algae and 158 species of animals were recorded. Records currently considered sensitive have been removed from this dataset.

本次调查旨在描述帕迪斯地区海底栖息地及生物群落的多样性，为水下保护年项目提供相关信息，并给予对自然历史感兴趣的潜水员参与由海洋研究生物学家主持的实地调查的机会。调查范围包括从特雷沃恩角至波特伊萨克港的27公里海岸线及其周边离岸岩石。在大部分海岸线上，沙滩平原或缓坡延伸至约5米深的浅水区域。在岬角和离岸岩石处，存在稳定且往往破碎的岩石基底层，深度可达20米及以下。在基准面附近存在明显的海底边缘带，随后是上部海底边缘带，其特征是存在海藻森林，延伸至大约3米处。暴露和半暴露地点的藻类种群存在显著差异。以叶状藻类为主的海底边缘带延伸至13米，其后是环海底带。此外，还讨论了种群类型及丰富度。凯兰角被认为是调查期间访问的最富饶的环海底地点。共调查了27个地点，记录了99种藻类和158种动物。目前认为敏感的记录已从本数据集中移除。