Lab 2, week 3

On Tuesday September 23rd, at 4:20pm in the forest at York University, a tree that was at least 3.4 metres tall (or about two times the measure's height) was found on the edge of the forest. The measurer then walked straight towards the centre of the forest. When they encountered a tree that was at least 3.4 metres tall again, the distance from the last tree was recorded in metres at the same measurer's breast height (about 1.2 meters) using a transect measuring tape . This was counted as a pair in the data set. Ten pairs of trees were used. The two trees' diameters at breast height were recorded in metres by having one student consistently taking the diameter of the tree using a transect measuring tape at their breast height (about 1.2 metres). Both trees in the pair were observed for their physical condition, by looking at their canopy coverage.9月23日周二下午4时20分，在约克大学（York University）的林区内，测量人员于林区边缘发现一棵高度至少为3.4米（约为测量者身高两倍）的树木。随后测量者径直前往林区中心，当再次遇见高度不低于3.4米的树木时，使用样带卷尺（transect measuring tape）在与测量者齐平的胸高位置（约1.2米处），记录该树木与前一棵目标树之间的距离，单位为米。该组两棵树即构成数据集内的一组树木对，本次实验共采集10组此类树木对。由一名学生使用样带卷尺，在约1.2米的标准胸高位置对每组树木对中的两棵树的胸径进行标准化测量，并以米为单位记录测量结果。同时，通过观测两棵树的冠层覆盖度，评估其生长状况。