Study on the practical application of terrestrial Isopods for environmental bio-indicators

对碎屑分解起重要作用的陆源等足类对环境条件的变化也很敏感。到目前为止，这位首席调查员已经研究过，陆地等足类的物种组成可能反映了环境自然性或人类影响的程度。然而，将等足类作为生物指示剂的定量研究还很少。在这项研究中，首席调查员计划弄清楚陆生等足类物种组成与其栖息地条件的关系，特别是与人类影响或环境自然性的程度有关。1996年和1997年，首席调查员在关东区即东京都、千叶县和福岛县进行了各种环境污染的调查。本研究鉴定出的等足目动物主要有4种：黄花Armadillidium fulgare、斑点亚目Nagarus maculatus、斑点亚目Porcellio scaber、日本叶鞘Ligdium Japan onicum和球形目Shaerillo obculus。许多资料表明，这些物种的组成具有人类影响或环境自然性的特征。本研究的目的是分析等足类物种分布与环境自然性的关系，并以陆地等足类作为生物指示物。但是，在校办企业的很多情况下，本研究的目的并没有完全实现。首席调查员将在另一次机会中认识到这个问题

Terrestrialisopodsthatactimportant roles for detritus decomposition are also sensitive to the changes in environmental conditions. Up to this time, it has been studied by this head investigator that the species composition of terrestrial isopods might reflect the degree of environmental naturality or human impact. However, quantitative study on isopods as a bio-indicator is a very few. In this study, the head investigator planned to make clear the relationship between species composition of terrestrial isopods and their habitat conditions especially concerning to the degree of human impact or environmental naturality. In 1996 and 1997, the head investigator surveyed in Kanto district ie Tokyo metropolitan area Chiba prefecture and Fukushima prefecture under various environmental connditions. Identified isopods in this study were mainly four species as following : Armadillidium fulgare, Nagarus maculatus, Porcellio scaber, Ligidium japonicum and sphaerillo obsculus. Many datum implied that theise species composition were characteristic to the degree of human impact or environmental naturality. The goal of this study was to analyze the relation between isopods speceis deistributuin and environmental naturalitu and to put the bio-indicator by terrestrial isopods. But, under many circumstances of school businesses, the goal of the study was not achieved completely. The head investigator will realize this subject another chanse cirtainly