Traffic victims otters

Traffic victims of the otters during the migration between fragmented nature reserves. A map with locations of observed casualties. 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, the following considerations have been taken into account: 1. The suitability of the watercourse and riparian zone as a migration route for the otter. 2. The type of road (municipal, provincial or state 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 Netherlands Nature Network (NNN) looked at the extent to which the potential habitats and migration routes correspond to the ecological connection that has/will be realized.本数据集聚焦于在碎片化自然保护区间迁徙途中的水獭交通事故遇难个体，包含观测到的遇难个体位置分布图。当当前栖息地内部或栖息地之间的某一地点存在发生水獭交通事故的合理可能性时，即会被判定为一处交通瓶颈（Kuiters & Lammertsma, 2014）。在评估交通瓶颈的紧急程度时，已综合考量以下因素： 1. 水道与滨水带作为水獭迁徙通道的适宜性； 2. 道路类型（市政道路、省级道路或国家级道路）； 3. 涉事道路的最高限速（60km/h及以上时致死风险较高）； 4. 下穿通道的存在情况，及其尺寸与类型； 5. 下穿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（Netherlands Nature Network, NNN）所绘制的地图，旨在评估潜在栖息地与迁徙路径与已实现或待实现的生态连通性的契合程度。