In order to assess indicating function of Ischnura elegans in lead polluted water, we collected samples (each sample contains 9 individuals male & female adults) three times from the East Lake of Qingxu county and a fish-pond in Taiyuan in May?

• 为确定长叶异痣对水体铅污染的指示作用,于2000年5月、7月和8月3次在太原市清徐县东湖及鱼塘采集长叶异痣(成虫)样品(每个样品含9个个体)及水样,进行分析研究。