内蒙古锡林河中游典型草原虻类幼虫的初步调查  

A PRELIMINARY INVESTIGATION ON THE TABANIDAE LARVAE IN TYPICAL STEPPE OF THE MIDDLE REACHES OF THE XILIN RIVER,INNER MONGOLIA

作　　者：高权荣[1] 刘永江[2] 石珍宝[1] 

机构地区：[1]内蒙古医学院基础医学部寄生虫学教研室,呼和浩特010059 [2]内蒙古师范大学生物系,呼和浩特010022

出　　处：《内蒙古农业大学学报（自然科学版）》2002年第1期32-35,共4页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：中国科学院内蒙古草原生态系统定位站资助项目

摘　　要：内蒙古典型草原虻类幼虫是土壤动物中的常见类群 ,分布是散在性的。调查年份中最高密度为 32个m- 2 ,最低密度为 1个 m- 2 大针茅草原数量高于羊草草原。大针茅草原虻幼虫的年际间密度变化、垂直与水平分布和年度的季节动态等在典型草原区具有代表性。 1991年～ 1993年单位面积虻幼虫的密度高低顺次为 1992年 >1993年 >1991年。大针茅草原虻虫季节动态为春季稍高于夏季 ,而以秋季为最高 ,可视为季节的规律。羊草草原则无规律性变化。虻幼虫的垂直分布以 1991年为例 :大针茅草原春季高密度在 2 0 cm～ 30 cm、秋季在 0 cm～ 10 cm土层外 ,3个季节 10 cm～ 2 0 cm土层密度也相当高 ,羊草草原的夏季高密度也在 10 cm～ 2 0 cm土层中 ,这与沙带相同 ,表现出沙化趋势。The Tabamdae larvae are the common type of soil anmal in Inner Mongolia typical steppe and the distribution is dispersive,The density is between 32/m 2 and 1/m 2 and the density in the Stipa grandis steppe is higher than that in the Leymus chinensis steppe.The annual and the seasonal change of density and the vertical and level distribution of the Tabanidae in the Stipa grandis steppe is typical example in the typical steppe.The order of the density in the period of 1991～1993 is 1992>1993>1991.The pattern of seasonal change of density shows the density in spring is higher than that in summer and the most density is in autumn in the Stipa grandis,whereas the change is not regular in the Leymus chinensis steppe.The example of vertical distrbution (1991) menifests the most density is in the layer 20cm～30cm in spring and in 0cm～10cm in autumn,meanwhile the density in the layer 10cm～20cm is higher in the three seasons in the Stipa grandis steppe,in Leymus chinensis steppe,the most density is in the layer 10cm～20cm in summer too.This condition shows the trend of desertification for the condition is similar to the sandy land.

关 键 词：内蒙古锡林河中游 虻类幼虫 典型草原 生态系统 土壤动物 

分 类 号：S812[农业科学—草业科学]