Lab 02: Dataset 4 (Woodlot)

BIOL2050 Lab 02. This experiment was conducted in a Woodlot at York University on 23nd September 2015 between 4:30-5:15 pm with team members: Ratiba, Farkhunda, Reema, Olivia and Huda. The temperature was 22°C, clear skies with a cool breeze. Due to the canopy coverage there was very little sunlight in the Woodlot.

Adult Maple trees were chosen in the woodlot and their DBH (Diameter at Breast Height) was measured in inches using the measuring tape, from one end of the trunk to the other, keeping the tape straight. Then saplings of the same species nearest to the adult trees were located. The distance between the sapling and the adult tree was measured using the measuring tape, from the edge of the sapling to the edge of the adult tree. Then the DBH of the saplings were recorded using the measuring tape, from one end of the trunk to the other, keeping the tape straight. The canopy coverage was estimated in percentage by forming a square with fingers and holding it up and estimating how much sky is visible. The canopy coverage percentage sometimes exceeded 100% as a result of overlapping layers of the leaves and branches.

BIOL2050 实验02。本实验于2015年9月23日下午4:30至5:15在约克大学的一片林地中开展，参与团队成员包括Ratiba、Farkhunda、Reema、Olivia与Huda。实验当日气温为22℃，天气晴朗且伴有微风；由于冠层遮挡，林地内光照极少。
研究人员选取该林地内的成年枫树，使用卷尺沿树干平直测量其胸径（Diameter at Breast Height, DBH），测量单位为英寸。随后定位距离成年树最近的同种枫树苗，使用卷尺测量树苗与成年树的间距，测量起点为树苗树干边缘，终点为成年树树干边缘。接着使用卷尺以相同方式测量并记录该枫树苗的胸径。冠层覆盖率通过以下方式估算：用手指围成正方形举至眼前，估算可见天空的占比；由于叶片与枝条的层叠覆盖，冠层覆盖率有时会超过100%。