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

数据创建与提交者：汉南·法亚兹（Hannan Fayyaz）；贡献成员：戈帕尔·帕巴蒂（Gopaul Parbatie）、阿尔伯特·林（Albert Lin）与加贾穆甘·拉贾瓦罗坦（Gajamugan Rajavarothayan）

研究方法：本实验旨在识别样带沿线的重复样树及其邻株，并记录两类树木的多项特征，具体包括两树间距、两棵树的胸径（diameter at breast height，简称dbh），以及重复样树的健康状况。实验流程如下：
1. 在林地地块的边缘至中心区域布设一条直线样带；
2. 将沿布设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；
3. 定位该重复样树的最近邻株（注：邻株无需位于样带直线上），测量两树之间的距离，并同步测量该邻株的胸径；
4. 按0至2的分级标准记录重复样树的健康状况（分级标准与对应状态详见下文）。

重复上述流程，直至沿样带共采集到10棵重复样树（n=10）。所有原始数据记录于表格中，后续转换为Excel工作表。
本次实验采用样带法测量树木间距与胸径，为生成统一且可对比的可视化图表，所有数据均统一转换为相同单位。

重复样树健康状况的分级标准如下：
0级：树木濒临死亡，可能无法维持自身结构，枝干脱落且叶片数量极少；
2级：树木长势旺盛但未达最佳状态，枝干或叶片开始脱落，但相较于1级整体状况相对良好；
3级：树木健康状况极佳，可支撑枝干与叶片，处于最佳生长状态。

本实验于2015年9月24日周四的14:30至17:30间，在约克大学（York University）基尔校区（Keele campus）的林地地块内开展。

### 字段说明
1. 两树间距：重复样树（即本次研究的目标主树）至其最近观测邻株的距离，邻株无需位于布设的样带上，测量单位为米；
2. dbh1：主树的胸径（diameter at breast height），测量位置为观测者胸高位置，测量单位为米；
3. dbh2：重复样树最近邻株的胸径，测量位置为观测者胸高位置，测量单位为米；
4. 树木健康状况：按0-2分级记录的重复样树健康状态，具体标准如下：
0级：树木濒临死亡，无法维持自身结构，枝干脱落且叶片数量少于最优水平；
2级：树木长势旺盛但未达完美状态，枝干或叶片开始脱落，但相较于1级整体状况相对良好；
3级：健康状况极佳，可支撑枝干与叶片，处于最佳生长状态。

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