ecology 2 .xlsx

Height Measured in centimetres # of leaves Number of leaves visible attached. # of flowers Number of flowers recorded if visible. Degree of Crowdedness 0 = open, 1= some plants nearby, 2 = quite a few and 3 = very much crowded bunch of plants within 50cm, regardless of species. Methods Description: On Wednesday, September 21^st, 2016, at roughly 2:50 pm, with sunny clear skies, data was collected. Data was collected at the York University grasslands. A transect tape was elongated to 25 meters and then placed along the grassland. Each time the species was spotted with the naked eye touching the transect, its properties were recorded as displayed on the excel spreadsheet. Variables are explained by the meta data. At random, one leaf was chosen from the species, stretched to its full length and measured by another measuring tape in centimetres. Then, all of the leaves attached to the species were counted. Number of flowers were recorded if seen. Lastly, how crowded the patch was, was recorded from 0 to 3. Numbers are explained by the Meta data, this means that if the grass is all the way around the species, degree is 3. This process was repeated for a number of 50 individuals. The numbers from 0 to 3 are huge indication if the grass abundance is high or low and dry and aid identifying patterns. Common name for the species is known as Dandelion, scientifically known as T<i>araxacum officinalis</i>.株高：单位为厘米；叶片数：统计可见且附着于植株的叶片总数；花朵数：若可见花朵则记录其数量；拥挤度：分级标准为0至3，其中0代表开阔无邻株，1代表周边存在少量其他植物，2代表周边存在较多邻株，3代表50厘米范围内存在大量植株（无论物种种类）。 采集方法说明：2016年9月21日周三下午约2:50，天气晴朗无云，在此完成数据采集。数据采集地点为约克大学（York University）草原样地。将样带卷尺拉伸至25米后沿草原样地布设，当通过裸眼观察到目标物种触及样带时，即按照Excel表格预设条目记录其相关性状，变量详情详见元数据。具体采集流程如下：随机选取该物种的一片叶片，拉伸至自然舒展的最大长度后，使用另一卷尺测量其长度（单位：厘米）；随后统计该植株所有附着叶片的总数；若可见花朵则记录花朵数量；最后按0至3分级记录样块的拥挤程度，分级标准详见元数据——若该物种四周均被草本植物环绕，则拥挤度为3。上述流程共重复采集50个植株个体的数据。0至3的分级数值可有效指示草本盖度的高低与生境干燥程度，同时有助于识别种群分布模式。该物种的俗名为蒲公英（Dandelion），学名为<em>Taraxacum officinalis</em>。