Woodlot, Dataset #3 - Comparing Distance and Diameter of Trees Using Transect Techniques

The data was collected at the woodlot of York University Campus on Wednesday, September 23, 2015 at 4:10 pm to 4:50 pm contributed by J. Quach, L. Tran, Amin A., S. Alvi and I. Darman. At arrival on the woodlot, our group started walking from the edge of the woodlot until reaching the centre of the woodlot in a straight line, extending the transect tape along the way. Every instance an adult tree is encountered, the diameter at breast height (DBH) was measured in metres using transect measuring tape from chest level and after the nearest tree is encountered, the distance between each pair of trees is measured in metres using transect measuring tape. Furthermore, the adult trees of each pair were observed through one’s field of vision and labeled from a scale of 0 to 2, where 0 meaning the tree is dead, 1 meaning the tree is living and 2 meaning the tree has a huge green canopy. These steps are then replicated for a total of 10 times for each pair of trees. The purpose of this experiment indicates that the data shown marks the distinction of proximity between each pair of trees varying on growth conditions and sizes, where it can be a useful indicator whether an ecosystem is endangered or not, as well to be useful to other fields of research.

本数据集采集于约克大学（York University）校园林地，采集时间为2015年9月23日周三16:10至16:50，由J. Quach、L. Tran、Amin A.、S. Alvi与I. Darman共同贡献。抵达林地后，研究团队从林缘沿直线步行至林地中心，沿途布设样带测量卷尺；每遇一株成年树木，即于胸高位置使用样带卷尺测量其胸径（diameter at breast height, DBH），单位为米，在遇到最近邻树木后，使用样带卷尺测量每两棵树之间的距离，单位亦为米。此外，研究人员通过目视观察每对成年树木，并以0至2的分级标准进行标注：0代表树木已死亡，1代表树木存活，2代表树木拥有茂密的绿色冠层。上述步骤针对每对树木重复执行共计10次。本实验旨在通过该数据集体现不同生长状况与体型的树木对之间的邻近程度差异，该数据可作为评估生态系统是否濒危的有效指标，同时亦可服务于其他研究领域。