BIOL 2050 Labs 5 + 6, Invertebrate abundance and diversity in grassland and pond environments

Data was collected for field experiment near York University's Stong Pond west of the Osgoode woodlot on October 14th and 21st 2015. It was 13 degrees Celsius on the 14th with a Beaufort number of 4, and 11 degrees Celsius with a Beaufort number of 3 on the 21st. 36 pan traps (12 each of blue, yellow, and white) were placed in a rarely mowed rectangular area roughly 5 m by 25 m, with one edge touching the waterline of Stong Pond. Starting from the edge of the water, a 25 m long transect was placed. Every 5 m interval (0 m, 5 m, 10 m, 15 m, 20 m, and 25 m) another transect 5m in length was placed perpindicular to the first 25 m transect and roughly parallel to the water's edge. Along each of these secondary transects 6 pan traps were evenly distrbuted, 2 of each colour, so that there was a trap every 1 m within each row. To randomize the trap colours each of the 6 spots within each row were given a number between 1 - 6. A die would be rolled, and for each bowl, the number rolled would correspond to a spot on the transect row. Rolls for spots already taken were rerolled until that row was filled with bowls (2 each of yellow, blue, and white). This was repeated for each row until there were 36 total traps placed. Each trap was filled one quarter of the way up with soapy water, starting with traps closet to the water, then working eastward. After 1.5 hours had elapsed the traps were observed and data was recorded on the number and species of intertebrates found, most of which were insects. Plant species diversity was also recorded for each row of 6 traps. Only plant species that touched or crossed the transect for each row perpendicular to the water were recorded.

本数据集采集于2015年10月14日与21日，采集地点为约克大学（York University）奥斯古德林地（Osgoode woodlot）西侧的斯通池塘（Stong Pond）周边野外实验场地。10月14日的气温为13摄氏度，蒲福风力等级（Beaufort number）为4级；10月21日的气温为11摄氏度，蒲福风力等级为3级。共设置36个色盘诱捕器（pan traps），其中蓝色、黄色、白色各12个。诱捕器布设区域为一片极少进行修剪的矩形场地，尺寸约5米×25米，场地一侧边缘紧邻斯通池塘的水岸线。以水岸边缘为起点布设一条长25米的主样带，沿该主样带每隔5米（分别为0米、5米、10米、15米、20米、25米处），设置一条垂直于主样带、大致平行于水岸的5米长副样带。每条副样带上均匀布设6个色盘诱捕器，每种颜色各2个，即每1米设置1个诱捕器。为随机分配诱捕器颜色，将每条副样带上的6个布设点位编号为1至6。通过掷骰子确定每个诱捕器的布设点位，骰子点数对应副样带上的点位编号；若点位已被占用，则重新掷骰，直至该副样带的6个点位（黄、蓝、白各2个）全部完成布设。该流程逐副样带重复，直至累计布设完成36个诱捕器。所有诱捕器均装填四分之一容量的肥皂水，布设顺序从靠近水岸的点位开始，向东依次推进。1.5小时后对诱捕器进行检视，记录所采集到的无脊椎动物的数量与物种信息，其中绝大多数类群为昆虫。同时记录每条副样带6个诱捕器所在区域的植物物种多样性，仅统计触碰或横跨该副样带的植物物种。