Techniques& Data: Field training in York University's Woodlot

Methods: On Thursday September 22, 2016 students sampled plant populations and communities by using transect measuring tapes to record the measurements from the edge of the woodlot to the centre. Lab mates measured the distance between trees, diameter at breast height, and its condition, for a total of ten adult trees. Each lab mate was tasked to consistently measure one attribute each to reduce error and inconsistencies. Study site: This study took place at York University’s Woodlot. This lab was conducted outdoors, the weather was mainly cloudy, humid, and a very light rain shower. Hypothesis: Tress at the edge of the woodlot would be smaller than trees closer to the centre of the woodlot, because humans are the biggest driver on the global planet and would cause less disturbance amongst tress further into the woodlot and its ecological system. Predictions: 1) The adult trees closer to the centre of the woodlot would have a greater diameter than the adult trees at the edge of the woodlot. 2) The adult trees at the centre of the woodlot would be taller(more than 3 times the height of one lab mate who’s height is 167cm) compared to the adult trees at the edge of the woodlot. 3) The adult trees in the centre of the woodlot would have green and fuller leaves compared to adult trees at the edge. Photosynthesis would enable the trees at the centre of the woodlot to absorb more nutrients and project a greener colour. Meta-Data:Attribues- Any tree that is three times the height of one lab mate who's height is 167cm. Distance between trees (Meter)- The starting point is 0 and tress were measured in meters, from one tree to the next. dbh- distance breast height, the same lab ,ever measured the dbh from their height consistently. Conditions-0=dead, 1=living, 2= huge green canopy Group members: Brenda Espin, Kiana Malak Hosseini, Michelle Urman

研究方法：2016年9月22日周四，学生们采用样带卷尺开展林木种群与群落采样，记录从林地块（woodlot）边缘至中心的各项测量数据。每位实验组员负责测量一项固定指标，以降低误差与测量不一致性，共完成10棵成年树木的相关数据采集，测量内容包括树间距、胸径（diameter at breast height，DBH）及树木健康状况。

研究地点：本次实验设于约克大学（York University）林木地块，实验全程在户外开展。当日天气以多云为主，湿度较高，伴有零星小雨。

研究假设：林地块边缘的树木将小于靠近林地块中心的树木，原因在于人类是全球范围内的主要干扰因子，林地块深处及其生态系统受到的人类干扰更少。

预测结果：1）林地块中心附近的成年树木胸径将大于林地块边缘的成年树木。2）林地块中心的成年树木高度将超过林地块边缘的成年树木（前者高度将达到身高167cm的实验组员的3倍以上）。3）林地块中心的成年树木叶片将更为翠绿繁茂，光合作用可使中心树木吸收更多养分，从而呈现出更鲜亮的绿色。

元数据：
指标说明：
- 高度阈值：高度达到身高167cm的实验组员3倍的树木
- 树间距（米）：以0为起始点，以米为单位测量相邻树木间的距离
- dbh（胸径，diameter at breast height）：由固定组员以自身身高作为参照统一开展测量
- 树木健康状况：0=死亡，1=存活，2=冠幅巨大且翠绿

小组成员：布伦达·埃斯平（Brenda Espin）、基安娜·马拉克·侯赛尼（Kiana Malak Hosseini）、米歇尔·厄曼（Michelle Urman）