Species point records from 1977-78 WWA Usk and Wye estuaries sublittoral survey

There is little detailed information available on the invertebrate macrofauna of the Usk and Wye Estuaries. This report describes the Distribution and abundance of the benthic invertebrate macrofauna and examines a number of factors thought most likely to influence the organisms concerned. 1. Studies were initiated during 1977 and winter and summer surveys were undertaken on each estuary. Grab samples from sites at approximately one kilometre intervals were taken for quantitative estimates of the sediment fauna. 2. Sediment characteristics and particle size analysis were measured and tidal water quality data including temperature, salinity and suspended solids were measured. 3. Quantitative estimates of the sediment macrofauna were analysed by a biological index of similarity and classified by an agglomerative cluster analysis. The sublittoral sediments of both the Usk and Wye Estuaries support a reduced fauna, consisting mainly of annelids and some molluscs, compared with the Outer Bristol Channel. Site details have not yet been entered.

关于乌斯克和韦伊河口的无脊椎动物大型群落，详细的资料甚少。本报告详细阐述了底栖无脊椎动物大型群落的分布和丰度，并探究了诸多可能影响相关生物的诸多因素。1. 研究工作始于1977年，对每个河口进行了冬季和夏季的调查。在约一公里间距的地点采集了抓取样本，以进行沉积物生物群落的定量估计。2. 测量了沉积物特征和颗粒大小分析，并收集了潮汐水质数据，包括温度、盐度和悬浮固体。3. 通过生物相似性指数对沉积物大型群落的定量估计进行了分析，并通过聚簇分析对其进行分类。与外布里斯托尔海峡相比，乌斯克和韦伊河口的亚潮间带沉积物支持着一个生物多样性减少的群落，主要由环节动物和一些软体动物组成。尚未录入站点详细信息。