Yorku.Grassland.Woodlot.Sep27-2016.csv

Data Column Headers and Descriptions: Pan Trap Replicates: 10 pan traps (plastic bowls with a diameter of 15 cm and a depth of 6.5 cm) were placed in each habitat. The pan traps came in three colours: yellow, white, and blue. Habitat: refers to the habitat in which observations were recorded. The two habitats that were assessed are grassland and woodland. Grassland is defined as an open area at least 250m by 250m in size with few trees. Woodlot is defined as a forest on campus Number of Insects: the number of insects in each pan trap was visually assessed and recorded. Categorical variable; a discrete number of insects were observed. Number of RTUs: the number of recognizable taxonomic units (acronym: RTUs) in each pan trap was visually assessed. Categorical variable; a discrete number of RTUs were observed. Additional Information: Hypothesis and Predictions: It was hypothesized that in the grassland there are more insects and more recognizable taxonomic units than in the woodlot. I predict that pan traps placed in the grassland will capture more insects than pan traps placed in the woodlot. I also predict that the pan traps placed in the grassland will yield more recognizable taxonomic units than pan traps placed in the woodlot Time Data Was Collected: Tuesday, September 27, 2016. 3:20-4:05 EST. Duration of Survey: 45 minutes. Location of Data: Grassland and adjacent woodlot at York University, near York Boulevard. Latitude and longitude: 43.775, -79.505. Weather Conditions: 21 degrees Celsius, cloudy/overcast, and dry conditions. Survey Method: Ten pan traps were placed in each habitat. One pan trap was placed randomly at the periphery of each habitat. Successive pan traps were placed approximately two meters (two stride-lengths) westward from the initial pan trap. Directionality was determined using the iPhone compass application. Each plastic bowl was filled half-way with soapy water. In each habitat, three yellow-coloured, three blue-coloured, and four white-coloured pan traps were placed. The pan traps were arranged in the following order by colour: white-blue-yellow. The first pan trap placed at the periphery was white-coloured. The pan traps were left in each habitat for 45 minutes. After 45 minutes, the pan traps were visually assessed and the number of insects and the number of species (recognizable taxonomic units) were recorded.

数据列标题与说明：
碗状诱捕器（pan trap）重复组：每个生境中放置10个碗状诱捕器，诱捕器为直径15厘米、深度6.5厘米的塑料碗，共设有黄、白、蓝三种配色。
生境：指开展观测记录的生境类型。本次评估共涉及两类生境：草原与林地（woodlot）。其中，草原定义为面积不小于250米×250米且树木稀少的开阔区域；林地则指校园内的森林区域。
昆虫数量：采用目视计数法统计每个碗状诱捕器内的昆虫数量，为分类变量，观测得到的昆虫数量为离散数值。
可识别分类单元（recognizable taxonomic units，缩写：RTUs）数量：采用目视计数法统计每个碗状诱捕器内的可识别分类单元数量，为分类变量，观测得到的可识别分类单元数量为离散数值。
附加信息：
假设与预测：研究假设为，草原生境中的昆虫数量与可识别分类单元数量均多于林地生境。据此提出两项预测：其一，放置于草原的碗状诱捕器可捕获更多昆虫；其二，放置于草原的碗状诱捕器可获得更多可识别分类单元。
数据采集时间：2016年9月27日星期二，东部夏令时（EST）3:20-4:05。
调查时长：45分钟。
数据采集地点：约克大学（York University）内的草原及毗邻林地，临近约克大道（York Boulevard）。经纬度坐标：北纬43.775，西经79.505。
天气状况：气温21摄氏度，阴天/多云，天气干燥。
调查方法：每个生境中放置10个碗状诱捕器。首先在每个生境的边缘随机放置1个诱捕器，后续诱捕器沿初始诱捕器以西方向依次布设，间距约2米（约2步幅），方向采用iPhone指南针应用确定。每个塑料碗装入半量的肥皂水。每个生境中分别放置3个黄色、3个蓝色及4个白色的碗状诱捕器，布设顺序依次为白-蓝-黄：首个放置于生境边缘的诱捕器为白色。诱捕器放置时长为45分钟，时长结束后采用目视计数法统计诱捕器内的昆虫数量与可识别分类单元数量并完成记录。