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，该实验于约克大学（York University）的一片草地样地内开展，旨在探究边缘效应对昆虫丰度与植被密度间关系的影响，实验分两日完成。研究人员从草地边缘向样地中心布设了总长25米的样带卷尺（transect tape），本次实验所定义的草地边缘为草地出现终止或逐渐收窄的区域。研究人员为陷阱诱捕器（pitfall traps）开挖小型基坑，并沿样带以5米的间隔布设诱捕器，诱捕器相对于草地边缘的位置通过样带进行测量并记录。在每个诱捕器上方布设1m×1m的样方（quadrat），诱捕器置于样方中心，随后通过计数样方内单株草本与植物的数量来计算植被密度。上述流程共在4条独立样带上重复开展，每条样带布设5个陷阱诱捕器，总计布设20个诱捕器。所有诱捕器均在布设1.5小时后进行检查，以统计捕获的昆虫数量。