Habitat Networks (England) - Lowland Heathland

This is the record for Lowland Heathland which forms a part of the Habitat Networks (Individual) (England) dataset (link below). The habitat network maps seek to apply the best evidence and principles and to use the best available nationally consistent spatial data. The habitat network maps are developed around 4 distinct habitat components sets and include 4 distinct network zones where action may be undertaken to build greater ecological resilience. The different elements of the maps are described below: Habitat Components; • The location of existing patches of a specific habitat for which the network is developed. This is termed the ‘Primary habitat’ e.g. lowland heathland. The main baseline data used for this is the Priority Habitat Inventories (PHIv2.2). • The location of additional habitat that naturally form mosaics with the primary habitat e.g. habitats that are most likely to form ecological mosaics possibly used by species associated with the primary habitat. This is termed the ‘Associated habitat’. The main baseline data used for this is the Priority Habitat Inventories (PHIv2.2). • The locations where habitat creation or restoration is known to occur, this is primarily sites under relevant agri-environment options. This is termed the ‘Habitat creation’ • Sites where data suggests small fragments of the primary habitat or degraded habitat exists and where restoration may be possible, this is primarily developed from information held within the current PHI v2.2. This is termed the ‘Restorable habitat’. Network Zones; • Land within close proximity to the existing habitat components that are more likely to be suitable for habitat re-creation for the particular habitat. These areas are primarily based on soils but in many cases has been refined by also using other data such as hydrology, altitude and proximity to the coast. This is termed the ‘Network Enhancement Zone 1’. • Land within close proximity to the existing habitat components that are unlikely to be suitable for habitat re-creation but where other types of habitat may be created or land management may be enhanced including delivery of suitable Green Infrastructure. This is termed the ‘Network Enhancement Zone 2’. • Land immediately adjoining existing habitat patches that are small or have excessive edge to area ratio where habitat creation is likely to help reduce the effects of habitat fragmentation. This is termed the ‘Fragmentation Action Zone’. • Land within relatively close proximity to the Network Enhancement Zones 1 & 2 that are more likely to be suitable for habitat creation for the particular habitat and identifying possible locations for connecting and linking up networks across a landscape. This is termed the ‘Network Expansion Zone’. Note: For some habitat networks not all of the habitat components or all the action zones are identified either because the data does not exist or the habitat does not lend itself to identifying particular types of action. Further details are outlined in the Habitat Network Mapping Guidance document. The Network boundary is drawn around the 4 habitat components using a variable buffering process with a generalised distance of 500m although 1km was used for Blanket Bog. As the boundary for each habitat network is tightly drawn around the existing patches of habitat this means that at a national scale the habitat network is composed of a series of smaller ‘networks’ that encapsulates one or more clusters of existing habitat patches. These may be considered as ‘network segments’. The Network Expansion Zone has been drawn around these segments to identify areas where additional action may be undertaken to build greater ecological resilience across the wider landscape. Attribution statement: © Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right [year].本条目隶属于英格兰地区生境网络（个体）（Habitat Networks (Individual) (England)）数据集，对应低地荒地（Lowland Heathland）。 本生境网络地图旨在采用最优证据与原则，并使用全国统一的最佳可用空间数据。该地图围绕4类独立生境要素集构建，并包含4类可开展相关行动以提升生态韧性的网络分区。下文将对地图的各组成要素进行详细说明： ### 生境要素 • 本网络所针对的特定生境的现存斑块位置，此类生境被称为"核心生境（Primary habitat）"，例如低地荒地。本类别的主要基准数据为优先生境清单（Priority Habitat Inventories, PHIv2.2）。 • 与核心生境自然形成镶嵌格局的额外生境分布位置，即最有可能与核心生境形成生态镶嵌体、可供核心生境关联物种利用的生境。此类生境被称为"关联生境（Associated habitat）"。本类别的主要基准数据同样为优先生境清单（PHIv2.2）。 • 已知将开展生境营造或修复工作的区域，此类区域主要为纳入相关农业环境计划的地块。此类区域被称为"生境营造区（Habitat creation）"。 • 数据显示存在核心生境小型斑块或退化生境、且具备修复可能性的区域，此类区域主要基于现行优先生境清单（PHI v2.2）中的信息构建。此类区域被称为"可修复生境（Restorable habitat）"。 ### 网络分区 • 紧邻现存生境要素、更适宜针对目标生境开展生境重建的区域。此类区域最初基于土壤数据划定，多数情况下还结合水文、海拔及滨海邻近度等其他数据进行优化。此类区域被称为"网络增强区1号（Network Enhancement Zone 1）"。 • 紧邻现存生境要素，但不适宜开展目标生境重建，但可营造其他类型生境或提升土地管理水平（包括建设适宜的绿色基础设施）的区域。此类区域被称为"网络增强区2号（Network Enhancement Zone 2）"。 • 直接毗邻现存小型生境斑块或边缘面积比过高的生境斑块的区域，在此类区域开展生境营造有助于缓解生境破碎化影响。此类区域被称为"破碎化行动区（Fragmentation Action Zone）"。 • 相对邻近网络增强区1号与2号、更适宜针对目标生境开展生境营造的区域，用于识别跨景观尺度连接各生境网络的潜在点位。此类区域被称为"网络扩展区（Network Expansion Zone）"。 备注：部分生境网络未涵盖全部生境要素或行动分区，原因在于相关数据缺失，或该生境类型不适合识别特定类型的行动。更多详细信息可参见《生境网络制图指南》（Habitat Network Mapping Guidance document）。本网络边界基于4类生境要素通过可变缓冲流程划定，通用缓冲距离为500米，泥炭沼泽（Blanket Bog）采用1000米缓冲距离。由于每个生境网络的边界均紧密环绕现存生境斑块划定，因此在全国尺度下，该生境网络由一系列小型"网络"组成，每个小型网络包含一个或多个现存生境斑块集群，此类小型网络可被视为"网络片段（network segments）"。网络扩展区即围绕此类网络片段划定，用于识别可在更广泛景观尺度上开展额外行动以提升生态韧性的区域。 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 [年份]。