WK3 LAB 2 BIO 2050 Dataset 3

The dataset 3 was collected on September 22, 2015 at 3:56 pm by a group of 5 Ecology (Bio 2050) students. Data was collected near the Osgoode Library woodlot via transect measuring tapes. The group of students searched for any adult tree at the woodlot or in other words, any tree whose diameter was wider than the diameter of an average adult fist. Once the tree #1 was selected, the group proceeded to measure the tree's diameter. The measuring tape was held at chest height and horizontally extended to measure the diameter of the tree in meters. Afterward, the students assessed the living condition of the tree on a scale from 0 to 2 by observing the general appearance, number, pattern and coloration of leaves along the trunk and canopy as well as any presence of single or multiple dead branches. 0 on the given scale meant that a tree was dead; 1 meant that a tree was living or in acceptable living condition, while 2 indicated a huge green canopy. Then, students proceeded to measure the distance in meters from the tree of interest to the next adult tree by extending the measuring tape from the mid point of tree's trunk to the trunk's mid point of the next closest adult tree. It is important to note that all trees involved in the following collection of data were selected from the edge of woodlot to the center of woodlot moving in a North-South direction. After the first set of measurements, the group proceeded to collect the same type of data from 10 pairs of adult trees in total. The data was recorded, evenly shared amongst the group members and submitted to Figshare.com for assessment.

数据集3由5名修读生态学（Bio 2050）课程的学生于2015年9月22日下午3点56分完成采集。数据采集地点位于奥斯古德图书馆小片林地（Osgoode Library woodlot）附近，采用样带卷尺（transect measuring tapes）开展测量工作。该小组学生在该林地内搜寻所有成年树木——即胸径大于成人平均拳头直径的乔木。选定编号为1的目标树木后，小组随即开展胸径测量：将卷尺举至胸部高度并水平展开，以米为单位测得该树的直径。随后，学生们通过观察树干与树冠的整体外观、叶片数量、分布格局与色泽，以及是否存在单根或多根枯死枝条，按照0至2的评分标准评估该树的存活状况：评分0代表树木已死亡；评分1代表树木存活或生长状况良好；评分2则代表树冠繁茂翠绿。之后，学生们将卷尺从目标树木的树干中点延伸至紧邻的下一棵成年树木的树干中点，测量二者之间的距离（单位：米）。需特别说明的是，本次后续数据采集涉及的所有树木均沿南北方向，从小片林地的边缘向中心依次选取。完成第一组测量后，该小组共完成了10组成年树木对的同类数据采集。所有数据均被记录，由小组成员平均分工整理后，上传至Figshare.com平台供评审。