Ecology Lab 5: Completed Experimental Design

Data collected from a field experiment investigating edge effects on the relationship of insect abundance and vegetation density on two different days in a grassy lot at York University. 25 meters of transect tape was laid out beginning from the edge of the grassland towards the center of the field. The edge was deemed to be any area where the grassland seemed to end or taper off. Small holes were dug for the pitfall traps, which were placed 5 meters apart from each other along the transect line. Their position relative to the edge of the grassland was measured by the transect line and was recorded. A 1m by 1m quadrat was placed on each trap, with the trap in the center, and the vegetation density was calculated by estimating the number of individual grasses and plants. This process was repeated for a total of 4 different transects with 5 pitfall traps on each line, so a total of 20 pitfall traps were placed and subsequently examined after 1.5 hours to check for trapped insects.

本数据集源自一项野外实验，旨在探究边缘效应对昆虫丰度与植被密度间关联的影响。实验于两日内于约克大学（York University）的一处草坪地块开展：从草地边缘向场地中心铺设25米长的样带胶带，其中草地边缘被界定为草地终止或逐渐收窄的区域。沿样带每隔5米布设一个陷阱诱捕器（pitfall trap），布设前需预先挖掘小型孔洞以安置诱捕器；各样点相对于草地边缘的位置通过样带测量并记录。每个诱捕器上方均放置一个1米×1米的样方（quadrat），诱捕器置于样方中心，通过计数单个草本与植物个体的数量来估算植被密度。本实验共布设4条独立样带，每条样带设置5个诱捕器，总计布设20个诱捕器。布设完成1.5小时后，对所有诱捕器进行回收检视，以统计捕获的昆虫。