Bottlenecks fauna supply otters

Bottlenecks of the otters during the migration between fragmented nature reserves. A map that distinguishes the potential habitats and migration routes and a map with all the bottlenecks, categorised on the basis of priority. A traffic bottleneck occurs when there is a reasonable chance of traffic casualties at a location within or between current habitats (Kuiters & Lammertsma, 2014). When assessing the urgency of a traffic bottleneck, there is the following: 1. The suitability of the watercourse and bank zone as a migration route for the otter. 2. The type of road (municipal, provincial or national road). 3. The maximum speed on the road in question (from 60 km/h fatal). 4. The presence of an underpass and its size and type. 5. The presence of obstacles in the underpass. 6.The presence of accompanying grids along the road. The map of the Nature Network Netherlands (NNN) examined to what extent the potential habitats and migration routes correspond to the ecological connection that has been/are realised.水獭在碎片化自然保护区间迁徙过程中的瓶颈问题。本数据集包含两张地图：一张用于区分潜在栖息地与迁徙通道，另一张标注了所有瓶颈并按优先级进行分类。交通瓶颈的定义为：在现有栖息地内部或栖息地之间的某一区域，存在发生交通致死事件的合理可能性（Kuiters & Lammertsma, 2014）。在评估交通瓶颈的紧迫性时，需考量以下维度： 1. 水道与岸带作为水獭迁徙通道的适宜性 2. 道路类型（市政、省级或国家级公路） 3. 对应道路的最高限速（60km/h及以上存在致死风险） 4. 地下通道的存在情况，及其尺寸与类型 5. 地下通道内是否存在障碍物 6. 道路沿线是否设有配套防护格栅 荷兰自然网络（Nature Network Netherlands, NNN）的相关地图，被用于评估潜在栖息地与迁徙通道与已实现或正在推进的生态连通性的匹配程度。