Traits of Aster prenanthoides (height, number of leaves, number of flowers and crowd level)

Aster prenanthoides (Late Purple Aster) was measured for its height, number of leaves, number of flowers and a quick assessment of how crowded it was around the plant was made. The experiment was conducted on September 23, 2014 at approximately 4:15 p.m. from the grassland east of Stong pond (43.770960, -79.506432) at York University. For this experiment, about 27 meters of transect tape was laid out starting from one A. prenanthoides, and the first 25 plants of this species along the transect tape was recorded for the measurements previously listed along with the distance it lay on the transect tape from the first plant. This particular species was chosen because it was easy to spot and differentiate amongst the other plants in the grassland. The experimenters on the team were Reema Patel, Melanie De Sousa, Gurnit Singh and Silvio Pacciti. To ensure measurements were constant, the same person measured the same variables for each plant.

本实验针对晚紫菀（Aster prenanthoides，Late Purple Aster）的株高、叶片数量、花朵数量开展测量，并对其植株周边的拥挤程度进行快速评估。实验于2014年9月23日约下午4时15分，在约克大学（York University）斯通池塘（Stong Pond）东侧的草地开展，采样坐标为(43.770960, -79.506432)。本次实验以一株晚紫菀为起点，铺设了约27米长的样带卷尺，沿该样带卷尺依次记录前25株该物种的前述测量指标，并记录每株植株距起点植株在样带卷尺上的距离。选取该物种作为实验对象，是因其在该草地中易于辨识且可与其他植物清晰区分。本次实验的参与者为Reema Patel、Melanie De Sousa、Gurnit Singh与Silvio Pacciti。为确保测量结果的一致性，所有测量变量均由同一人完成每株植株的测定。