Relationship between adult tree and sapling in Danby woodlot

This lab was done at Danby woodlot located at York University. The class was divided into groups of 4 or 5. My group members are Jordan, Mandy and Dylan. Before the lab began a particular specie of tree had to be chosen. Maple was picked because it was the most common one. 10 adult maple trees with saplings beside them were selected at random. The distance between the adult maple tree and the sapling was measured for the 10 trees using a transect. The transect was laid out from the adult tree to the sapling. This was measured in feet. After that the DBH (Diameter at breast height) was measured for both the adult tree and sapling also using a transect. The transect was put at chest level of the adult tree trunks and sapling (depending on the height). This was done for all 10 adult trees and saplings. It was measured in inches. Finally the canopy coverage was measured by using fingers to make a square and holding it up to make an estimate depending on how much sky could be seen from between the leaves of the adult tree. This was estimated in percentage. The purpose of finding the distance between the adult tree and sapling is to see if there is a relationship between the sapling and adult tree. The canopy coverage was taken to see how much effect tree coverage has on the environment. The environmental condition during the lab was cool.

本实验在约克大学（York University）的丹比林地（Danby woodlot）开展。本次课程将学生分为4至5人一组，我的组员为Jordan、Mandy与Dylan。实验开始前，需选定特定树种，最终选择了枫树——因其为该林地最常见的树种。我们随机选取了10株周边带有幼树的成年枫树。针对这10组样本，采用样带（transect）法测量成年枫树与周边幼树之间的距离：从成年树干至幼树布设样带，测量单位为英尺。随后，我们同样采用样带法测量成年枫树与幼树的胸径（Diameter at breast height，DBH）：将样带置于成年树干与幼树的胸部高度位置（根据植株高度调整），完成全部10组成年树与幼树的测量，测量单位为英寸。最后，通过手指围成正方形并举至眼前，根据成年枫树叶片间隙中可见天空的占比估算冠层覆盖度（canopy coverage），估算单位为百分比。本实验测量成年树与幼树间距的目的，在于探究幼树与成年树之间是否存在关联；而冠层覆盖度的测量，则用于评估树木覆盖对环境的影响程度。实验开展期间环境温度偏低。