lab2FieldTrainingwithPlants.csv

Hypothesis: It was hypothesised that the distance measured between adult trees would affect tree diameter because of space required for optimal growth. Prediction 1: As distance between each adult tree decreases, diameter of each adult tree also decreases. Prediction 2: As distance between adult trees increases, tree diameter simultaneously increases. Prediction 3: Distance between adult trees has no affect on tree diameter. Methods: Data was collected in the York University woodlot during the afternoon with sunny conditions. In order to assess the patterns between tree distance and tree diameter, 10 pairs of adult trees were used in which the variables included distance between each tree, diameter of each tree and the conditions in which they were in (living, dead, huge green canopy). Tree size was determined by ensuring that the standard to which tree sample would count as an adult tree was greater than 5 cm. Distance between 10 pairs of trees were measured using transect measuring tapes in centimetres. Observations were recorded. Ensured that the measurements between trees were done with only adult trees larger than 5 cm. Measurements were done with tape pressed flat on the ground facing up to the nearest flat point of the next adult tree. The diameter of each adult tree was recorded using a tape measure in centimetres. The tape measure was held up in front of the tree horizontally recording from the far left end of the tree to the far right end to ensure that the width was correctly measured. the condition of the adult tree was placed on a scale in which 0 meant the tree was dead, 1 meant that it was living and 2 meant that it resulted in a green canopy overhead to thus result in the absence of light or sky visibility. The conditions of the trees were measured by observing whether the tree appeared alive or dead. If it was observed as alive, it was further examined to ensure whether it formed a huge green canopy.

**假设**：本研究提出假设，成年树木间的测量距离会影响树木胸径，因为树木实现最优生长需要充足的空间资源。
**预测1**：随着每株成年树木间距离的减小，单株成年树木的胸径也会随之降低。
**预测2**：随着成年树木间距离的增大，单株树木的胸径会同步升高。
**预测3**：成年树木间的距离对树木胸径无显著影响。
**研究方法**：本研究于晴朗午后在约克大学（York University）林地开展数据采集工作。为探究树木间距与胸径之间的关联规律，本研究选取10组成年树木配对样本作为研究对象，采集的变量包括组内两棵树的间距、单株树木胸径以及树木生长状态（存活、枯死、拥有茂密绿色冠层）。本研究将胸径大于5cm的树木界定为成年树木的采样标准。使用样带卷尺以厘米为单位测量10组配对样本内两棵树的间距，记录观测数据，且仅对胸径大于5cm的成年树木开展测量工作。树木间距的测量方式为：将样带卷尺平铺于地面，从本树的最近平坦点延伸至相邻成年树木的最近平坦点进行测量。单株成年树木的胸径以厘米为单位进行记录：将卷尺水平环绕树干，测量树干最左侧至最右侧的宽度，以确保胸径测量准确。本研究对树木生长状态设置分级标准：0代表树木枯死，1代表存活树木，2代表拥有茂密绿色冠层的存活树木，此时树冠遮蔽下方区域，无法观测到天空或直射光线。树木状态的判定方式为：首先通过外观观测树木存活与否，若判定为存活，则进一步观察其是否拥有茂密的绿色冠层。