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).

本数据集采集于2015年9月28日约下午3时。研究地点涵盖约克大学基尔校区斯通池塘南侧的塞维尔林地与草原区域。当日气温约21摄氏度，天空多云；研究开始前曾有小雨，导致草原区域略显潮湿。

研究首先在斯通池塘的草原区域布设8个装有肥皂水的单碗式诱捕器。盘式诱捕器（pan traps，即单碗式诱捕器solo bowls）以约3米的间隔沿垂直线排列，布设间距通过样带法测量。诱捕器采用不同颜色交替的布设模式，以捕获不同类群的昆虫。该草原区域的诱捕器布设总长度为24米，以此均匀分布8个诱捕器。诱捕器均选址于潮湿区域，以提升各诱捕器的昆虫捕获成功率。随后在塞维尔林地布设剩余的诱捕器，由于林地步道行人较多，该区域的诱捕器均设置在林地边缘。所有诱捕器布设完成后，使用iPhone计时，静置约1小时。1小时后，记录每个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。各诱捕器中捕获的常见类群包括：(i) 家蝇（Musca domestica），(ii) 蜘蛛（Araneae），(iii) 甲虫（Coleoptera），(iv) 蜻蜓（Anisoptera），以及(v) 蟋蟀（Gryllidae）。