Rice paddies function as wetlands; therefore, abandoned paddy fields cause a loss of habitats for aquatic species, such as amphibians. Following the accident at the Fukushima Daiichi Nuclear Power Plant in 2011, paddy fields around the plant were abandoned and rapidly dried. To identify the impact of large-scale abandonment of paddy fields on the habitats of frogs, we investigated changes in the distributions of four frogs that breed in paddy fields using niche modeling and field surveys. The spatial distributions of suitable habitats before and after the accident for each frog were created using MaxEnt. In the area where rice cropping was restricted due to radioactive contamination, the areas of suitable habitats decreased for Pelophylax porosus porosus but increased or remained unchanged for other frogs after the accident. Additionally, field surveys conducted in 2014 indicated that the ratios of breeding sites in the area where rice cropping was restricted were significantly lower for P. p. porosus and Hyla japonica than outside this area. Thus, 3 years after the accident, one species strongly dependent upon paddy fields rapidly disappeared over a large area. Although amphibian populations or monitoring data were not available to examine changes directly after the accident in the study area, this research showed that the combination of niche modeling and field survey was effective for predicting species response after an accident and revealed that large-scale disasters sufficient to disrupt agricultural activity could markedly change the distribution of species reliant on habitats created by human activity.

稻田作为湿地；因此，废弃的稻田会导致两栖动物等水生物种的栖息地丧失。2011 年福岛第一核电站事故后，核电站周围的稻田被废弃并迅速干涸。为了确定大规模弃耕稻田对青蛙栖息地的影响，我们使用生态位模型和实地调查调查了在稻田中繁殖的四种青蛙的分布变化。使用 MaxEnt 创建了每只青蛙在事故前后合适栖息地的空间分布。在因放射性污染而限制水稻种植的地区，Pelophylax porosus porosus适宜栖息地面积减少但事故后其他青蛙的数量增加或保持不变。此外，2014 年进行的实地调查表明，水稻限制种植区的繁殖地比例明显较低。porosus和Hyla japonica比这个区域之外。因此，事故发生3年后，一个强烈依赖稻田的物种在大面积范围内迅速消失。虽然研究区的事故发生后并没有直接检查两栖动物种群数量或监测数据，但本研究表明，生态位建模和实地调查相结合对于预测事故后物种反应是有效的，并揭示了大规模灾害足以破坏农业活动可能会显着改变依赖人类活动创造的栖息地的物种分布。