Severn Estuary High Tide Waterbird Roost Sites (Clevedon to Oldbury and Bridgwater Bay)

Identification of wintering waterbird high tide roosts on the Severn Estuary SSSI/SPA completed in four phases:Phase 1 includes the Brean Down to Clevedon stretch. Phases 2 & 3 were completed at the same time. Phase 2 included the Clevedon to Oldbury stretch and Phase 3 Bridgwater Bay. Phases 2 & 3 also identified the subsites within Steart Marshes in Bridgwater Bay.Phase 4 includes the Gloucestershire area.This is a spatial dataset that identifies the locations of waterbird high tide roost sites in the Severn Estuary; and characterises the habitat(s) and waterbird composition. Information on the presence of waterbirds and their roost site characteristics was collected for each sector from the following sources: (i) WeBS core count (ie, high tide) data supplied by the BTO; (ii) interviews with the relevant WeBS counter; and (iii) site visits. This study provides much more detailed information than is generally available for the BTO collected WeBS data. The roost locations will help to determine whether the activities associated with a proposed plan or project could lead to impacts which have a significant adverse effect upon any given species or assemblage of water bird(s). Attribution statement: © Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right [year].本数据集针对塞文河口（Severn Estuary）特殊科学价值地点/特别保护区（SSSI/SPA）内的越冬水鸟高潮位栖息位点开展识别工作，全部工作分为四个阶段完成：第一阶段覆盖布里安角（Brean Down）至克利夫登（Clevedon）区段；第二与第三阶段同步开展，其中第二阶段涵盖克利夫登至奥尔德伯里（Oldbury）区段，第三阶段覆盖布里奇沃特湾（Bridgwater Bay）；第二、第三阶段同时识别了布里奇沃特湾内的斯蒂尔湿地（Steart Marshes）内部子位点；第四阶段覆盖格洛斯特郡（Gloucestershire）区域。 本数据集为空间数据集，用于识别塞文河口内水鸟高潮位栖息位点的位置，并对其栖息生境及水鸟群落组成进行特征描述。 本数据集针对每个区段收集了水鸟分布及其栖息位点特征相关信息，数据来源包括：(i) 由英国鸟类学信托基金会（British Trust for Ornithology, BTO）提供的湿地鸟类调查（Wetland Bird Survey, WeBS）核心计数（即高潮位计数）数据；(ii) 对相关湿地鸟类调查计数员的访谈记录；(iii) 实地踏勘结果。 本研究提供的信息较英国鸟类学信托基金会所收集的湿地鸟类调查公开数据更为详尽。 上述栖息位点的位置信息，可用于辅助评估拟议规划或项目相关活动是否会对特定水鸟物种或群落造成显著不利影响。 归属声明：© 英格兰自然署（Natural England）版权所有。包含英国地形测量局（Ordnance Survey）数据，© 皇家版权及数据库权益[年份]。