Alien species in Norway

Overview of alien species in Norway, and of ecological risk assessments of alien species that reproduce in Norwegian areas. In total, risk assessments of 1,180 foreign species that reproduce in Norwegian areas have been carried out in 2012, plus 134 species that in the future can be spread to Norway by human aid. so-called doorsteps.本数据集涵盖挪威外来物种（alien species）概况，以及针对在挪威境内繁殖的外来物种开展的生态风险评估（ecological risk assessment）情况。截至2012年，相关研究已完成1180种在挪威境内繁殖的外来物种的风险评估工作；另有134种未来可通过人类活动（即所谓的"门阶传入途径"）传入挪威的物种。