Lab 4: Field sample training with animals (pan trap)

The Pan Trap dataset was collected on the 1st of October 2014 at approximately 4:50pm, in both the grassland and woodlot area at the Keele campus of York University in Toronto, Ontario. It was a wet day as it had rained the night before and towards the end of the lab it was cloudy with showers. At the beginning of the lab, nine bowls of different colours filled with soapy water were placed at intervals in a random site at the grassland area. The soapy water was added to each bowl in order to kill whatever insects entered into it. The bowls were placed in a sequence of light blue, yellow and white so as to observe the insects that were attracted to each colour. Three blue coloured soapy bowls were also placed at a random site in the woodlot area. They were all the same colour as there were no more bowls of the other colours. Also the bowls were placed in a location where there would be minimal disturbance by other members of the lab so as not to scare away the insects. At the end of the lab, the number of insects and the number of different recognizable taxonomic units (RTUs) were determined in both the grassland and the woodlot. In the grassland area, a Large Carpenter Bee (Xylocopoa virginica)-order Hymenoptera, was attracted to one of the yellow bowls, then in one of the blue bowls there was a three-spotted jumping spider (Phidippus audax)-order Araneae. In another blue bowl in the grassland area there was Grasshopper- order Orthoptera and no insects were attracted to the white bowls. In the woodlot, only one insect was observed in all three blue bowls and they are called Aphids- order Hemiptera. A group of four students performed this experiment.Pan Trap数据集采集于2014年10月1日约下午4时50分，采集地点为加拿大安大略省多伦多市约克大学基尔校区的草地与林地区域。当日因前一夜降雨而较为潮湿，实验临近结束时转阴并伴有阵雨。实验初始，研究人员在草地区域的随机点位间隔放置9只盛有肥皂水的不同颜色碗具，碗具按浅蓝、黄色、白色的顺序排列，以观测对各颜色存在趋性的昆虫；每只碗内注入肥皂水的目的是灭杀落入其中的昆虫。在林地区域的随机点位仅放置了3只蓝色肥皂水碗——因无其余颜色的碗具，故全部采用蓝色；同时将碗具放置在尽量避开实验室其他人员干扰的位置，以防惊扰昆虫。实验结束后，研究人员分别统计了草地与林地区域的昆虫个体数与可识别分类单元（recognizable taxonomic units, RTUs）数量。草地区域中，1只黄色碗内吸引到了大木蜂（Xylocopoa virginica），隶属于膜翅目（Hymenoptera）；1只蓝色碗内发现三突花蛛（Phidippus audax），隶属于蜘蛛目（Araneae）；另一处草地蓝色碗内存在蝗虫，隶属于直翅目（Orthoptera）；白色碗未吸引到任何昆虫。林地区域的3只蓝色碗中共仅观测到1类昆虫，即蚜虫（Aphids），隶属于半翅目（Hemiptera）。本次实验由4名学生完成。