grassland lab

This dataset was collected based on transect technique to observe the abundance of Aster prenathoides(Late purple aster) in grasslands near York University, in Toronto. Sample number of 20 Purple Asters was collected using straight line 20 metre transect measuring tape, counting and observing the plants from 0 to 20 metres, as well as their Distance on transect in metres, height of the plant in centimetres, number of leaves on the plant, number of flowers, and level of crowdness in the scale of 0 being open, to 3 which states very crowded bunch of plants within 50 centimetres.

本数据集基于样带调查法（transect technique）采集，用于调查加拿大多伦多约克大学周边草原内晚紫菀（*Aster prenathoides*，Late purple aster）的种群丰度。实验采用20米直线样带卷尺开展采样工作，沿0至20米的样带区间依次计数并观测20株紫菀样本，记录的指标包括：植株沿样带的位置距离（米）、植株高度（厘米）、单株叶片数量、单株花朵数量，以及植株拥挤度评分（评分区间为0至3，其中0代表植株分布开阔，3代表50厘米范围内植株簇极为密集）。