Measure of Adult Trees on Transect along with Neighboring Tress as well as Distances, Condition and dbh

Data Created and Submitted by: Hannan Fayyaz Contributing Members: Gopaul Parbatie, Albert Lin and Gajamugan Rajavarothayan Methods: Objective of this lab was to identify replicate trees along a transect, their neighbouring tree and record various qualities of both trees. This included measuring the distance between the two trees, diameter at breast height (dbh) of both trees and condition of the replicate tree. The method of this lab is as follows: A transect was laid stretching from the edge to the middle of a woodlot area, forming a straight line. An adult tree which was seen along the laid transect was recorded as our replicate tree. The diameter at breast height (dbh) of this tree was measured. The closest neighbouring tree to this replicate tree was located (NOTE: neighbouring tree did not have to be along the line created by transect). The distance between the replicate tree and its neighbouring tree was measured. The diameter at breast height (dbh) of the neighbouring tree was also measured. The condition of the replicate tree was recorded which ranged from a scale of 0 to 2 (scale number along with respective condition is listed below). This process was done until a total of 10 replicate trees (n=10) were observed along the transect. All data was recorded in a table, which was later converted into an excel sheet. The distance between trees and their diameter at breast height (dbh) was measured using a transect. Similar data was recorded/converted into the same units to produce a more uniform/comparable chart. The numbers used to scale the condition of replicate tree are as follows: 0 = the tree may be dying. It may no longer be able to support its own structure. The branches are falling off and there are minimal amounts of leaves. 2= tree is vibrant but not in optimal condition. Branches/leaves may be beginning to fall off, but overall it is in relatively good condition compared to condition 1. 3= tree is in very good condition. The tree is able to support its branches and leaves. The tree is in optimal condition The experiment was conducted in the woodlot area of York University, Keele campus, between the hours of 2:30pm to 5:30pm on Thursday September 24th-2015 Distance from tree to next tree Distance from the replicate tree (the primary tree under question) to a closest observed tree, which unlike the replicate tree did not have to be on the laid transect. The distance between the two trees was measured in meters. dbh1 Diameter at breast height. The diameter of the primary tree recorded at observeres breast height. The diameter was measured in meters dbh2 Diameter at breast height. The diameter of closest tree to the replicate/primary tree. The diameter was measured at obervers breast height and Condition of Tree The condition of the replicate tree measured on a scale of 0-2. 0 = the tree is dying. It may no longer be able to support its structure. The branches are falling off and there are fewer than opimal amount of leaves. 2= the tree is vibrant but not in perfect condition. The branches/leaves may be beginning to fall off, but overall it is in realtivly good condition compared to condition 1. 3= very good conditions. The tress is able to suppost its branches and leaves. The tree is in optimal condition Notes

本数据集由Hannan Fayyaz创建并提交，贡献成员包括Gopaul Parbatie、Albert Lin与Gajamugan Rajavarothayan。

### 实验方法
本次实验的目标为沿样带识别重复样树及其邻近树木，并记录两类树木的多项属性，具体包括两棵树之间的间距、二者的胸径（diameter at breast height, dbh），以及重复样树的健康状况。实验流程如下：
1. 在林地块区域从边缘至中心铺设一条直线样带；
2. 将沿样带分布的成年树木记为本次实验的重复样树，测量其胸径（dbh）；
3. 定位该重复样树的最近邻树（注：邻树无需位于样带直线上），测量重复样树与邻树之间的距离，并测量该邻树的胸径（dbh）；
4. 按分级标准记录重复样树的健康状况。
重复上述流程，直至沿样带共采集到10棵重复样树（n=10）。

所有数据首先记录于表格，后续转换为Excel工作表。树木间距与胸径（dbh）通过样带完成测量，所有数据统一转换为相同单位，以生成更具统一性与可比性的图表。

#### 重复样树健康状况分级标准
本次实验初始说明分级范围为0至2级，实际采用三级标准记录树木健康状况，具体如下：
- 0级：树木濒临死亡，无法支撑自身结构，枝条脱落且叶片量极少；
- 2级：树木长势旺盛但未达最佳状态，枝条或叶片开始脱落，但相较于1级仍处于相对良好的状态；
- 3级：树木健康状况极佳，可稳定支撑枝条与叶片，处于最佳生长状态。

### 实验基本信息
本实验于2015年9月24日周四下午14:30至17:30，在约克大学（York University）基尔校区（Keele campus）的林地块区域开展。

#### 字段详细说明
1. **树木间距**：指重复样树（即本次研究的目标主树）与其最近观测邻树之间的距离，邻树无需位于铺设的样带上，测量单位为米；
2. **dbh1**：主树的胸径（diameter at breast height），即测量者胸高位置处的主树直径，测量单位为米；
3. **dbh2**：重复样树最近邻树的胸径（diameter at breast height），即测量者胸高位置处的邻树直径，测量单位为米；
4. **树木健康状况**：按0-3分级记录的重复样树健康状况，分级标准同前文所述。

### 备注