Habitat point records from 1993 OPRU Milford Haven sublittoral sediment survey

This survey was carried out with the objective of providing information on the range of seabed sediment biology throughout the length of the waterway. A total of forty sample stations, located from the lower reaches of both eastern and western Cleddau through the waterway to the entrance of Milford Haven off St Ann's Head, were sampled for biology and sediment composition. A 'reference' station was sampled adjacent to the offshore Island of Skomer for Comparative purposes. Quantitative biological samples were obtained from thirty six stations, by 0.1m2 day grab. Qualitative samples were obtained from two stations and two were found to be unsuitable for grab sampling. Sediment samples were obtained at each location for faunal and sedimentological analyses and samples collected for other analyses. Processing of the biological samples was carried out separately on both 1.0 mm and 0.5 mm sieve mesh size fractions, and this information has been pooled for the purpose of habitat records entered on the MNCR database. Biological sample processing involved identification of more than 125,400 individual animals from 418 quantitative and 38 qualitative taxa.

本调查旨在全面了解水道全段海底沉积物的生物多样性。调查共选取了四十个采样站，从克莱德河东西两岸下游直至米尔福德 Haven 港口附近的圣安头，对生物学和沉积物组成进行了采样。为比较研究，还对斯克默岛附近海域的‘参考’站进行了采样。通过0.1平方米/日的抓取法，从三十六个站点获取了定量生物样本。从两个站点获取了定性样本，另有两个站点不适宜进行抓取采样。在每个采样点均获取了沉积物样本，用于进行动物群和沉积学分析，并收集样本以供其他分析。生物样本分别在不同尺寸的筛网（1.0毫米和0.5毫米）上进行了处理，并将相关信息汇总至 MNCR 数据库中记录生境。生物样本处理涉及对超过125,400个个体动物进行鉴定，这些个体来自418个定量和38个定性物种。