Insect abundance using pan traps in the Saywell woodlot and grasslands at York University

Data was collected on September 28th, 2015 at approximately 3:00 pm. The location of the study was conducted at both the Saywell woodlot and the grasslands located south of Stong pond on York University Keele Campus. Weather conditions during that time was approximately 21 degrees celsius with cloudy skies. The grasslands were slightly damp and moist due to the light rain that had occured prior to the study. The study began with placing 8 solo bowls filled with soapy water in the grassland at Stong pond. The pan traps (solo bowls) were placed approximately 3 meters apart in a vertical line using a transect to measure the distance. Pan traps were placed in an alternate pattern of different colors in order to catch different insects. A total distance of 24 meters was used across the grasslands to evenly distribute the 8 pan traps. The location of the pan traps was determined by choosing an area that was moist. This allowed a higher chance of insects being collected in each pan trap. The same steps were repeated at the Saywell woodlot for the remaining pan traps. Pan traps were placed at the edge of the woodlot due to the number of people that were walking along the trails. Once all the pan traps had been placed, there was a waiting time of approximately 1 hour which was timed using an iPhone. After 1 hour had passed by, the abundance and the number of different recognizable taxonomic units (rtus) for each pan trap was recorded. Common species that were found among each pan traps included: (i) Housefly (Musca Domestica), (ii) Spiders (Araneae), (iii) Beetles (Coleoptera), (iv) Dragonfly (Anisoptera), and (v) Crickets (Gryllidae).

数据采集于2015年9月28日下午约3时。本研究的采样地点涵盖约克大学基尔校区的赛威尔林地（Saywell woodlot）与斯通池塘南侧的草原区域。当日气温约为21摄氏度，天空多云；研究开展前曾有小雨，致使草原区域地表略显湿润。
实验首先在斯通池塘的草原区域布设8个装有肥皂水的碗式诱捕器（pan trap）：采用样带法测量布设间距，将诱捕器以约3米的间隔沿垂直线排列，并以不同颜色交替布设，以覆盖不同昆虫类群。本次在草原区域布设的样带总长度为24米，确保8个碗式诱捕器均匀分布。诱捕器点位均选择在湿润区域，以提升各诱捕器的昆虫捕获效率。
随后在赛威尔林地重复上述实验步骤，布设剩余的碗式诱捕器。鉴于步道沿线行人较多，诱捕器均布设于林地边缘区域。
所有诱捕器布设完成后，使用iPhone计时，等待约1小时。1小时后，记录每个碗式诱捕器的昆虫个体丰度以及可识别分类单元（recognizable taxonomic units, RTUs）的数量。
各诱捕器中采集到的常见类群包括：(i) 家蝇（Musca domestica）；(ii) 蜘蛛目（Araneae）；(iii) 鞘翅目（Coleoptera）；(iv) 蜻蜓（Anisoptera）；(v) 蟋蟀科（Gryllidae）。