The Fukushima Daiichi power plant accident led to large‐scale and long‐term evacuation zones in which usual land‐use activities such as farming have been stopped. In particular, the loss of irrigated rice paddies is hypothesized to have seriously impacted freshwater biodiversity. In 2014, we started acoustic monitoring of frogs by using digital voice recorders in and around the evacuation zone. For the monitoring project, 52 and 57 monitoring sites were located within schoolyards (including those that had been converted into community centers) to examine the frog assemblages in the urban and rural landscapes of the region in 2014 and 2015, respectively. At each site, a digital voice recorder was installed during the period from May to July, and we recorded 10 min a day at night using a timed‐recording mode. We divided the audio data into 20‐s segments and identified species recorded in segments sampled from late May to late June (partly in early July). We identified eight frog species from 1,962 audio segments in total (correspond to 4 days per year in principal). For each species, intensity of calling at four levels was also recorded as an index of abundance. We are continuing to monitor and intend to update the dataset with new observations hereafter. Our dataset will support scientists and experts in recognizing the status and dynamics of anuran assemblages in and around the evacuation zone and will contribute to the promotion of open science.

中文翻译：

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福岛第一核电站事故疏散区内外的无色物种的声音监测数据

福岛第一核电站事故导致大规模和长期的撤离区，在该区已停止了诸如耕作等常规土地利用活动。特别是，灌溉稻田的损失被认为严重影响了淡水生物多样性。2014年，我们开始使用疏散区内外的数字录音机对青蛙进行声学监测。对于监测项目，分别在校园内（包括那些已转换为社区中心的监测点）分别设置了52个和57个监测点，以检查2014年和2015年该地区城市和乡村景观中的青蛙组合。在五月至七月期间，每个站点都安装了数字录音机，我们使用定时录制模式每天晚上录制10分钟。我们将音频数据划分为20 s的片段，并确定了从5月下旬到6月下旬（部分在7月初）采样的片段中记录的物种。我们从总共1,962个音频片段中识别了8种青蛙（本金相当于每年4天）。对于每个物种，在四个水平上的呼唤强度也被记录为丰度指数。以后我们将继续监视并打算用新的观察结果更新数据集。我们的数据集将支持科学家和专家认识疏散区域内和周围疏散无核生物的状态和动力学，并将有助于促进开放科学。总共962个音频片段（本金每年对应4天）。对于每个物种，在四个水平上的呼唤强度也被记录为丰度指数。以后我们将继续监视并打算用新的观察结果更新数据集。我们的数据集将支持科学家和专家认识疏散区域内和周围疏散无核生物的状态和动力学，并将有助于促进开放科学。总共962个音频片段（本金每年对应4天）。对于每个物种，在四个水平上的呼唤强度也被记录为丰度指数。以后我们将继续监视并打算用新的观察结果更新数据集。我们的数据集将支持科学家和专家认识疏散区域内和周围疏散无核生物的状态和动力学，并将有助于促进开放科学。