Pan-trap survey data from the UK Pollinator Monitoring Scheme, 2017-2020 version 2

Data is collected by PoMS volunteers and staff from up to 75 1 km squares, during four visits each summer, aiming for one visit in each month from May to August. There will be gaps in the data where a square cannot be visited during a particular year or month. At each visit, five pan-traps are positioned in a transect across the 1 km square, and left in position for approx. six hours. The insects trapped are returned to the PoMS laboratory, where all insects are sorted into main taxonomic groupings and counted, and all bees and hoverflies are passed to taxonomic experts for identification to species level where possible. Data is entered using online forms that promote consistency in data formats. QA checks are carried out on any photos provided that show plants in flower in the vicinity of the pan-traps; bee and hoverfly identifications are cross-checked by multiple taxonomists for all rare and apparently out-of-range occurrences, plus a random sample of other occurrences.本数据集的数据由PoMS志愿者与工作人员从最多75个1平方千米样方采集，每年夏季开展4次采样，旨在5月至8月每月各进行1次采样。若某年度或月份无法对某样方完成采样，则对应数据将存在缺失。每次采样时，研究人员会在该1平方千米样方的样带上布设5个诱捕盘（pan-traps），并将其静置约6小时。采集到的昆虫将被送至PoMS实验室，先按主要分类类群完成分拣与计数，随后所有蜂类与食蚜蝇（hoverflies）将被移交至分类学专家，尽可能鉴定至物种水平。数据通过标准化在线表单录入，以保障数据格式的一致性与规范性。针对诱捕盘周边开花植物的实拍照片开展质量保证（Quality Assurance，QA）核查；针对所有稀有物种、疑似分布超出自然范围的出现记录，以及其余出现记录的随机抽样样本，将由多名分类学家对蜂类与食蚜蝇的鉴定结论进行交叉复核。