Department of Environmental Sciences, University of Helsinki, Finland.
Risk Anal. 2013 Aug;33(8):1397-403. doi: 10.1111/risa.12069. Epub 2013 May 24.
The climatic conditions of north temperate countries pose unique influences on the rates of invasion and the potential adverse impacts of non-native species. Methods are needed to evaluate these risks, beginning with the pre-screening of non-native species for potential invasives. Recent improvements to the Fish Invasiveness Scoring Kit (FISK) have provided a means (i.e., FISK v2) of identifying potentially invasive non-native freshwater fishes in virtually all climate zones. In this study, FISK is applied for the first time in a north temperate country, southern Finland, and calibrated to determine the appropriate threshold score for fish species that are likely to pose a high risk of being invasive in this risk assessment area. The threshold between "medium" and "high" risk was determined to be 22.5, which is slightly higher than the original threshold for the United Kingdom (i.e., 19) and that determined for a FISK application in southern Japan (19.8). This underlines the need to calibrate such decision-support tools for the different areas where they are employed. The results are evaluated in the context of current management strategies in Finland regarding non-native fishes.
北温带国家的气候条件对入侵物种的入侵速度和潜在不利影响具有独特的影响。需要采取方法来评估这些风险，首先是对潜在入侵物种进行非原生种的预筛选。最近对鱼类入侵性评分工具（FISK）的改进提供了一种手段（即 FISK v2），可用于识别几乎所有气候带中潜在的入侵性非本地淡水鱼类。在这项研究中，FISK 首次在北温带国家芬兰南部得到应用，并进行了校准，以确定在该风险评估区域中具有高入侵风险的鱼类的适当阈值得分。“中”和“高”风险之间的阈值确定为 22.5，略高于英国的原始阈值（即 19）和日本南部 FISK 应用的阈值（19.8）。这强调了需要针对不同地区对这些决策支持工具进行校准。在芬兰关于非本地鱼类的当前管理策略的背景下评估了结果。
