Habitat Networks (England) - Rivers

This is the record for Rivers 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].

本记录为河流，属于栖息地网络（个体）（英格兰）数据集的一部分（链接见下文）。栖息地网络地图旨在运用最佳证据和原则，并利用最佳可用的全国一致空间数据。这些地图围绕四个独特的栖息地组成部分集合和四个独特的网络区域进行开发，在这些区域内可采取行动以增强生态韧性。以下是对地图不同元素的描述：

栖息地组成部分；
• 网络开发的特定栖息地现有斑块的位置，被称为‘主要栖息地’（例如，低地石南草地）。为此主要使用的是优先栖息地清单（PHIv2.2）作为基础数据。
• 与主要栖息地自然形成马赛克图案的附加栖息地位置，例如，最有可能形成生态马赛克的栖息地，可能被与主要栖息地相关的物种所利用。这被称为‘相关栖息地’。为此主要使用的是优先栖息地清单（PHIv2.2）作为基础数据。
• 已知栖息地创建或恢复发生的地点，这主要是处于相关农业环境选择下的地点。这被称为‘栖息地创建’。
• 数据表明存在主要栖息地或退化栖息地的小碎片，并且在这些地方可能进行恢复，这主要是从当前PHI v2.2中持有的信息中发展而来。这被称为‘可恢复栖息地’。

网络区域；
• 位于现有栖息地组成部分附近的土地，这些土地更有可能适合进行特定栖息地的栖息地重建。这些区域主要基于土壤，但在许多情况下，还通过使用其他数据进行了细化，例如水文、海拔和海岸线的邻近性。这被称为‘网络增强区1’。
• 位于现有栖息地组成部分附近的土地，这些土地不太可能适合进行栖息地重建，但可能创建其他类型的栖息地或增强土地管理，包括提供合适的绿色基础设施。这被称为‘网络增强区2’。
• 紧邻现有栖息地斑块的小块土地或具有过大的边缘与面积比率的土地，在这些地方，栖息地创建可能有助于减少栖息地碎片化的影响。这被称为‘碎片化行动区’。
• 位于网络增强区1和2相对较近的区域，这些区域更有可能适合进行特定栖息地的栖息地创建，并确定在景观中连接和链接网络的可能位置。这被称为‘网络扩展区’。

注意：对于某些栖息地网络，由于数据不存在或栖息地不适合识别特定类型的行动，并未识别所有栖息地组成部分或所有行动区域。更多详细信息请参阅栖息地网络制图指南文件。网络边界使用变量缓冲过程围绕四个栖息地组成部分绘制，一般距离为500米，但对于大片沼泽地则使用了1公里。由于每个栖息地网络边界紧密围绕现有栖息地斑块绘制，这意味着在国家尺度上，栖息地网络由一系列较小的‘网络’组成，这些网络包含一个或多个现有栖息地斑块集群。这些可以被视为‘网络段’。网络扩展区围绕这些段绘制，以确定可能采取额外行动以增强更广泛景观生态韧性的区域。版权声明：© 自然英格兰版权所有。包含皇家测量局数据©皇家版权和数据库权利[年份]。