Seedling and species recruitment of sown plant species

Seedling and species recruitment data for exotic ("EXO") and native ("NAT") sown species were recorded in the field on 0.5 x 0.5 square meter subplots in seed addition and control subplots (separate column "Control") on 18 experimental sites in two regions (8 Central California ("CA"), 10 Central Germany ("GE")). Data were recorded in 2012 (census 1 and 2) and 2013 (census 3). Subplots were either located in rodent exclosure (Rod), gastropod exclosure (Gas) or control plots (Con). The number of added seeds per species ranged from 50 to 175 (column "Number"), depending on the seed size. The number of sown species ranged from 17 (California) to 20 (Germany). Acronyms for the species can be derived by taking the first 3 letters of the genus and species names (see Table A 4).本数据集记录了外来（exotic, "EXO"）与本土（native, "NAT"）播种物种的幼苗及种群补充数据。数据于2012年（第1、2次普查）和2013年（第3次普查），在两个区域共18个试验样地的0.5×0.5平方米小样方中实地记录：其中加利福尼亚中部（Central California, "CA"）样地8个、德国中部（Central Germany, "GE"）样地10个，样地分为种子添加样方与对照样方（单独列项"Control"）。所有小样方分别设置为啮齿动物排除区（Rod）、腹足类动物排除区（Gas）与对照样区（Con）。单物种的播种种子数介于50至175之间，对应列项"Number"，具体数值取决于种子大小。各试验样地的播种物种数量介于17种（加利福尼亚样地）至20种（德国样地）之间。物种缩写可通过取属名与种名的前3个字母推导得出（详见表A4）。