Study for the Biotope Conservation and Network with the Frogs-habitat in Rural Area

近年来，生物多样性的重要性已被广泛接受。在这种情况下，生态信息是必不可少的区域景观规划在城市和农村地区。我们提出了一个程序来估计物种分布在农村地区使用两栖动物为材料。根据两栖动物种类组成与土地属性的关系，构建了潜在生境的估算模型。对水户市及其周边地区24个地点的两栖动物进行了调查。它分为丘陵地区和高原/低地地区。丘陵地区的特点是;小鲵东京，蛙ornativentris和蛙rugosa。为了解神奈川县丘陵地区两种褐蛙的种群密度，于2001年调查了蛙的栖息地分布并进行了卵块计数。多摩丘陵和三浦丘陵分布着许多日本杜鹃的栖息地。花腹沙蚕的生境对生境条件的恶化较为敏感 关于我们 在城市丘陵区的生长状况优于丽腹杜鹃。我们认为两个棕色青蛙的卵块的计数是可能从各个部门积累的有用信息。我们讨论了池蛙的栖息地，并在岩泽冲积扇的稻田边沟的结构对应。为了弄清岩泽蛙类的栖息地与景观结构的关系，还进行了1：25000的样带调查。日本林蛙（Rana japonica）和装饰腹蛙（R.ornativentris）的繁殖地仅限于冲积扇边缘。本文对岩泽冲积扇稻田周围沟渠的分布进行了调查和研究。调查方法是在构成亚热带的主要环境--沼泽地、林缘、林内分别设置样方，作为种群密度的询问方法。因此，平均种群密度因植被而异。因此，植被管理是保护日本林蛙的必要措施。少

The significance of biodiversity has been widely accepted in recent years. In this context ecological information are indispensable for regional landscape planning in both urban and rural areas. We propose a procedure to estimate species distribution in a rural area using amphibians as materials. Estimation model of potential habitats was constructed based on the relationship between amphibian species composition and land attributes. The investigation of amphibians in 24 sites was performed in and around Mito city. it was divided into hilly areas and plateau/lowland areas. Hilly areas are characterized by ; Hynobius tokyoensis, Rana ornativentris and Rana rugosa. To understand population density of two brown frogs in hilly area in Kanagawa prefecture, we investigated the distribution of frog's habitats and counted egg masses in 2001. Many habitats of R.japonica dotted in Tama Hills and Miura hills. Habitat's of R.ornativentris were sensitive species to the deterioration of habitat's co … More ndition than R.ornativentris in urban hilly area. We consider the counting of egg masses of two brown frogs the useful information that is possible to accumulate from various sectors.We discussed about habitation of the pond frog Rana porosa porosa, and correspondence of the structure of a ditch in the side of a paddy field in the Isawa alluvial fan. The belt-transect survey at a scale of 1:25000 was investigated in order to clarify the relation between the inhabitation of frogs and the landscape structure in the Isawa too. The breeding site of brown frogs Rana japonica and R.ornativentris, was restricted to the edge of the alluvial fanThe distribution of a ditch around a paddy field in the Isawa alluvial fan was investigated and considered We study the characteristics of habitat use by Japanese forg, Rana japonica at non-breeding season in Yato-space in the city-surroundingarea. Investigation installing quadrate, respectively in the fen, forest edge, and forest interior, which are the main environment constituting yato-stace, and was taken as the method of asking for the population density. As a result, the mean population density was different according to vegetation. Therefore, vegetation management is necessary for conservation of Japanese brown frog in the fen. Less