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 Deosamy, Mandy Huynh and Dylan Stoll. 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.

本实验于约克大学（York University）所辖丹比林地（Danby woodlot）内开展。本次课程将学生划分为4至5人一组的实验小组，我所在小组的成员为Jordan Deosamy、Mandy Huynh与Dylan Stoll。实验启动前，我们需选定目标树种，最终选择枫树作为研究对象，因其为当地最为常见的树种。我们随机选取了10株周边带有幼苗的成年枫树。针对这10株成年枫树，我们使用样带（transect）测量其与周边幼苗的间距：样带从成年枫树延伸至幼苗处，测量单位为英尺。随后，我们使用样带测量了成年枫树与幼苗的胸径（DBH, Diameter at breast height）：将样带置于成年树干与幼苗的胸部高度位置（依植株实际高度调整），为全部10组成年树与幼苗完成该测量，测量单位为英寸。最后，我们通过双手手指围成正方形框架并举起该结构，依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。测量成年枫树与幼苗间距的目的，在于探究幼苗与成年树之间是否存在关联；冠层覆盖度的测量则用于评估树木覆盖对周边环境的影响程度。实验开展期间环境温度偏低。