乌鲁木齐市四个不同点地衣形态结构及重金属含量的比较研究

目的]探讨地衣形态结构特征、地衣体重金属含量和大气重金属污染三者之间的关系.方法]采自乌鲁木齐市近郊区花儿沟、仓房沟、西山农场和南山小渠子的丽石黄衣(Xanthoria elegans(Link)Th.Fr)和碎茶渍(Lecanora argopholis (Ach) Ach.)作为实验材料进行形态结构和重金属含量比较并分析与大气污染之间的关系.结果]4个区域地衣样品形态结构有差异.长势变化程度依次为仓房沟＞西山农场＞花儿沟＞南山小渠子.各采样点丽石黄衣地衣体内重金属含量之间有显著性差异.4个样点重金属综合污染程度依次为仓房沟＞西山农场＞花儿沟＞南山小渠子.结论]仓房沟是Fe、Mn、Zn和Pb污染区,西山农场是Cr、Mn和Pb污染区,花儿沟是Cr污染区.地衣形态结构特征、地衣体重金属含量和大气重金属污染之间具有显著的相关性,即大气重金属含污量是地衣体重金属含量增减的直接原因,地衣体重金属含量的增加导致地衣形态变化的主要因素之一.大气重金属污染是导致地衣形态变异以及地衣消亡的致命性因素之一.

Comparative Study on Morphological Structure and Heavy Metal Content of Lichen Species from Four Sampling Sites of Urumqi,Xinjiang

Objective]The purpose of this project was to discuss the relationship between the lichen morphological characters,heavy metal content as well as atmospheric heavy metal pollution.Method]The specimens Xanthoria elegans(Link)Th.Fr and Lecanora argopholis(Ach)Ach.collected from the four sampling sites which are located in the outskirt area of Urumqi city,Xinjiang,China were taken as experiment materials.They were analyzed and compared with each other by its morphological structure and heavy metal content of ...