Reserch of the food chain model to evaliate influence on soil ecosystem by soil pollition

1)我们准备了两种弹尾目的弹尾目，即假丝裂孔菌和黄弹尾菌，用于新的OECD检测指南的建议。这是一个国际性的环试，涉及材料和工艺的掌握。2）对日本栃木县汤川流域富砷土壤中的跳虫进行了调查，优势种为日本常见的6种跳虫，即Folsomia aculata、Onychiurus flavescens、Folsomia regularis、Hyogastrura communis、0.01、Micrisotoma achromatanm，其相对丰度均在5%以上。与不同生境的跳虫区系相比，本研究区跳虫区系的特点是以规则Folsomia regularis和日本Willemia japonica的数量最多，而Isotomiella minor的种群密度较低。蚯蚓生物量在污染时间较长的土壤中有增加的趋势。我们建立了污染恢复期模型，根据老化效应预测没有毒性效应的时间。4）在日本中部的渡濑水库，具有铜污染土壤的减速盆地调查多足动物区系。在铜污染场地和清洁场地共发现秀丽单跗线螨、锈色长跗线螨、霍氏长跗线螨、厚足石螨6种。我们还测量了体内铜和锌的密度。

1) We prepared two species of Collembola, Folsomia candida and F.fimetaria, for the proposal of new OECD test guidline. This is aninternational ringtest, and it involves materials and craft mastership. We noticed that peat procurance and preparation for the test had someproblems.2) The collembolan fauna of arsenic-rich soil was surveyed at the drainage basin of the Yukawa in Tochigi Pref. Dominant species were six common Collembola in Japan, Folsomia octoculata, Onychiurus flavescens, Folsomia regularis, Hyogastrura communis, 0.japonicus, Micrisotoma achromatanm, whose relative abundance were 5 % and over. In comparison with the collembolan faunas among various their habitats, this study area is characteristic in abundant Folsomia regularis and Willemia japonica and in the low population density of Isotomiella minor.3) We evaluated time course changes in heavy metal toxicity of soil. Thebiomass of earthworms tended to increase in soils with oldercontamination. We made pollution recovery period model that predicts the time when there was no toxic effect according to the ageing effect.4)Myriapod fauna investigated at the Watarase Reservor, central Japan retarding basin having copper contaminated soil. Six species of Monotarsobius elegans, Pacymerium ferrugineum, Prolamnonyx holstii, Esastigmatobius japonicus, Lithobius pachypedatus were found in copper contaminated site and clean site. We also measured the density of copper and zinc in the body.