LESLIE OSEI DATASET 2 ECOLOGY INSECTS AND COLOURS.csv

Variables Description Colour of bowl There were 18 circular coloured bowls in total. The colours were Blue, Yellow and White. 9 bowls were placed in the grassland and were subdivided into 3 blue bowls, 3 yellow bowls and 3 white bowls. The other 9 bowls were placed in the woodlot and were subdivided into 3 blue bows, 3 yellow bowls and 3 white bowls. The bowls were sequentially placed together following the Blue, Yellow, White pattern. The pans were placed about one meter apart. Type of Habitats There were two distinct habitats and they served as an experimental ground. The habitats were grassland and woodlot. Grassland contained a lot of grasses and weeds with barely any trees. The ground was very dry. Woodlot was mostly made up of trees with barely any grasses and the soil was mostly moist. Number of insects The total number of insects in each colour bowl placed in the two distinct habitat and were counted and recorded in the data sheet. Most insects were found in either the yellow or white colour bowl Number of rtus RTU is the acronym for Recognizable Taxonomic Unit and this was calculated by analyzing the different species captured in each bowl. Hypothesis: There will be more insect captured if the pan traps used in this experiment was coloured as supposed to colourless. This is because insects are attracted to bright colours according to the Ultra Violet spectrum of light therefore, bright colours are the most reflected to their visual sensory organs. The experiment was conducted on September 28, 2016 at the York University Keele Campus Grassland and Woodlot between the hours of 3:00pm to 5:00 pm. The purpose of this experiment was to see the correlation between the number of insects captured and the colour of the circular bowl most animals are attracted to. The temperature was about 18 degrees Celsius and it was a windy day. The grassland was the first study site used. 9 circular coloured bowls were placed one meters apart from each other in a sequential order. The order was Blue, Yellow and White. The field consisted of 3 Blue bowls, 3 Yellow bowls and 3 white bowls. The second field study site was the woodlot. As described above, the sequential order and the same number of coloured bowls were placed on the woodlot. Each circular coloured bowl was filled with three quarters of soapy water. The study sites were revisited after an hour and half and each insect caught was recorded. The insects were viewed with the naked eye. The total number of insects caught on both grassland and woodlot were recorded in the data sheet for each colour bowl and its respective field of study. The number of different species caught on both field were also recorded for each colour bowl and its respective field of study. According to the data collected most of the animals were attracted to the yellow and white circular data bowl. There were more different species found in the White and yellow coloured bowl than the Blue bowl.

变量说明
## 碗具颜色
本实验共设置18只圆形彩色碗，颜色涵盖蓝色、黄色与白色。其中9只放置于草原生境，分为3只蓝色碗、3只黄色碗与3只白色碗；剩余9只放置于林地生境，同样分为3只蓝色碗、3只黄色碗与3只白色碗。所有碗具按照蓝、黄、白的顺序依次排布，碗具间距约1米。
## 生境类型
本实验设置两种不同生境作为试验场地，分别为草原与林地。草原生境以草本植物与杂草为主，几乎无乔木，地表干燥；林地生境以乔木为主，草本植物稀少，土壤多呈湿润状态。
## 昆虫数量统计
对放置于两种生境中各颜色碗具内的昆虫总数进行计数，并将结果记录于数据表中。实验观测发现，多数昆虫集中于黄色或白色碗具内。
## 可识别分类单元（Recognizable Taxonomic Unit, RTU）数量
RTU为可识别分类单元的缩写，通过分析各碗具内捕获的不同物种进行计算。
## 实验假设
相较于无色碗状诱捕器，本实验使用的彩色碗具可捕获更多昆虫。其原理为：昆虫会被可见光紫外光谱中的明亮色彩所吸引，明亮色彩会更多地反射至昆虫的视觉感知器官，从而对昆虫产生吸引作用。
## 实验过程与结果
本实验于2016年9月28日在约克大学基尔校区的草原与林地生境开展，实验时段为当日15:00至17:00。当日气温约为18摄氏度，且有微风。
首先开展草原生境的试验：将9只圆形彩色碗按照蓝、黄、白的顺序依次排布，碗具间距为1米，该组碗具包含3只蓝色碗、3只黄色碗与3只白色碗。随后在林地生境开展试验，同样按照上述顺序与数量设置彩色碗具。每只圆形彩色碗具内装入约四分之三容量的肥皂水。实验开展1.5小时后返回试验场地，通过肉眼观测对捕获的昆虫进行记录。
将草原与林地生境中各颜色碗具的总捕获昆虫数，分别记录于对应生境的数据表中；同时统计各颜色碗具在对应生境中捕获的不同物种数量。实验采集的数据显示，多数动物更青睐黄色与白色圆形碗具，白色与黄色碗具内的物种丰富度高于蓝色碗具。