摘要
利用指示值法确定监测环境变化的指示生物具有可操作性强、应用范围广等优点。文中研究了沙坡头地区人工固沙植被演替中大型土壤动物类群的指示值变化,由于研究区动物种类相对贫乏、在采样中的出现频度也较低,因而各动物类群的指示值均相对较低,仅鳃金龟科幼虫为人工灌溉样区的特征性指示类群。对动物类群作合并计算,无灌溉样区特征性类群有8类。大部分动物类群指示值的变化随人工固沙植被演替时间的延长成正或负相关,有5类土壤动物达到显著性相关。在干旱地区应用指示值法应以合并动物类群计算为宜。
The advantages of indicator-value(IndVals) method for indicating environment changes were that the method was easily operated. And the results from it in one study region can compare with others that from other study region. In this paper, the changes of macrofauna group IndVals in shapotou region were studied. Because the numbers of macrofauna species in the study region are relatively poor and their frequencies of occurring in samplings are also lower, their IndVals all were lower. The only one characteristic group of macrofauna bioindicators was larvae of Melolonthidae in the irrigative site. After combination of macrofauna groups and sites, there were 8 characteristic groups in un irrigated site. Most macrofauna groups have positive or negative relations to the artificial plant succession. And 5 macrofauna detector groups have markedly relations to the artificial plant succession. It is better to combine macrofauna groups for calculating IndVals in arid region.
出处
《中国沙漠》
CSCD
北大核心
2005年第1期40-44,共5页
Journal of Desert Research
基金
中国科学院沙坡头沙漠试验研究站开放基金(200017)资助
