Seasonal and lunar variability in planaria mobility, and influences from natural fluctuations in the Earth’s geomagnetic field

Planaria mobility data Different planaria were measured every week for one year. Each planaria was measure din a 100mm petri with 20mL of spring water. Underneath the petri dish was 0.5cm grid paper, this was used to count the number of gridlines each planaria crossed in 5minutes. We found an interaction between season and moon phase, where the planaria showed significantly higher grid counts when the Earth was moving through the Summer and Fall seasons during the new moon and first quarter. This is not seen in the other seasons or moon phases. This seasonal timing of this effect coincides with increased background photon emissions, indicating this change may have been influencing the planaria. In another analysis we z-scored the planaria mobility and coded each day there was a planaria that had a z-score greater than 2, because this indicates it was an outlier. We found there to be greater geomagnetic storm activity surrounding days when outliers were present. For the variables DOY = day of year EST = Eastern standard time Grid = number of gridlines crossed in 5 minutes Moon = moon phase, where 0=new moon; 1=first quarter; 2=full moon and 3=third quarter Season; where 0=fall; 1=winter; 2=spring and 3=summer

涡虫（Planaria）运动数据集

不同涡虫在为期一年的周期内每周接受一次测量。每只涡虫均被置于盛有20mL泉水的100mm培养皿（Petri dish）中，培养皿下方铺设有0.5cm间距的方格纸，用于统计涡虫在5分钟内跨越的方格线数量。

研究发现季节与月相之间存在显著交互效应：当地球处于夏、秋两季且对应新月（new moon）和上弦月（first quarter）时，涡虫的方格线跨越数显著更高；而在其余季节或月相下未观察到此现象。该效应的季节性发生时段与背景光子发射增强的周期相吻合，表明这类环境变化可能对涡虫的运动产生了影响。

在另一项分析中，我们对涡虫运动数据进行了Z分数（z-score）标准化处理，并对当日存在Z分数大于2的涡虫的天数进行编码——该阈值表明对应个体属于异常值。研究发现，异常值出现的前后时段地磁风暴活动更为频繁。

本次研究涉及的变量说明如下：
DOY：一年中的第几日（day of year）
EST：东部标准时间（Eastern standard time）
Grid：5分钟内跨越的方格线数量
Moon：月相，其中0代表新月（new moon）、1代表上弦月（first quarter）、2代表满月（full moon）、3代表下弦月（third quarter）
Season：季节，其中0代表秋季（fall）、1代表冬季（winter）、2代表春季（spring）、3代表夏季（summer）