Populations of the brown frogs Rana arvalis, R. dalmatina and R. temporaria in 46 ponds in south Zealand during the years 1992-2020

The Excel sheets present data on the number of egg clumps of three species of brown frogs, in 46 water bodies, during the period 1992 to 2020 in a 1.8 km² area in Denmark The map shows the position of the 46 water bodies in the area Kulsbjerge in south Zealand.本数据集的Excel表格记录了1992年至2020年间，丹麦1.8平方千米研究区域内46处水体中三种棕蛙的卵块数量；配套地图展示了西兰岛南部库尔斯比耶（Kulsbjerge）区域内这46处水体的空间位置。