WEEK 4: Dataset 1 - Using a quadrat to determine RTUs

Description The experiment was conducted on Monday September 28nd at approximately 3:45 pm until 5:00. All the data was collected in the woodlot and corresponds to dataset 1. It was cloudly, windy and humid. The temperature was around 20 degrees celcius. Materials: Quadrat, 1m by 1m Method: 20 quadrats were used in total, 10 to be placed in the grassland and 10 to be placed in the woodlot. The selection of each quadrat in the habitat was randomized by first selecting a location and then the next one would be located 1.5 meters north to the previous location where the quadrat was placed. The quadrat was left in place for a duration of 2 minutes. After the desired time elapsed 2 minutes were spent counting the insects within the quadrat. The recognizable RTUs include dragonflies, mayflies, grasshoppers,bugs,butterflies,moths beetles, flies, ants, wasps, bees and spider.本实验于9月28日周一下午约3:45至5:00期间开展。所有采集数据均来自林地（woodlot），对应数据集1。当日天气为多云、多风且湿度较高，气温约20摄氏度。 实验材料：1米×1米样方框（quadrat）。 实验方法：共使用20个样方框，其中10个布设于草地生境，剩余10个布设于林地生境。样方框的生境选取采用随机化方式：先选定初始布设点位，后续每个样方框均设置在前一样方框北侧1.5米处。每个样方框放置时长为2分钟，待预设时长结束后，耗时2分钟统计样方框内的昆虫个体数量。本次可识别分类单元（Recognizable Taxonomic Units，RTUs）包括蜻蜓、蜉蝣、蝗虫、蝽类、蝴蝶、蛾类、甲虫、蝇类、蚂蚁、胡蜂、蜜蜂以及蜘蛛。