2024-03-29T00:27:05Z
https://repository.dl.itc.u-tokyo.ac.jp/oai
oai:repository.dl.itc.u-tokyo.ac.jp:00000763
2022-12-19T03:41:47Z
27:28:37
9:10:11
Relationships between Population Density of Frogs and Environmental Conditions in Yatsu-Habitat
谷津環境におけるカエル類の個体数密度と環境要因の関係
東, 淳樹
2934
武内, 和彦
2935
629
290.13
The research on the relationship between the environmental conditions of the habitat and the speci.es and the individual number was made in respect to the frogs which inhabiting in the Kashima and Tegri River, watershed of Inba Marsh, Chiba Prefecture. The field-survey was carried out from May to July in 1997 and 1998. Walking on the paddy field ridge, the number of the frogs, the walking distance and the environmental factors of the surrounding area were recorded. Then the relationship between the individual density of each species and the environmental conditions was analyzed by means of Hayashi's quantification theory I. As a result, the major factors which would affect the individual density were clarified: The underdrainage of the paddy field, the landuse of the slope, the irrigation system and the arrangements of the canal. Another fact was also revealed that the reformation into well-drained paddy field which is promoted by the farmland consolidatuin tends to have the negative impact on the inhabiting of the Japanese brown frog while it does not have much affect on that of the Japanese tree frog.
journal article
日本造園学会
1999
application/pdf
ランドスケープ研究 : 日本造園学会誌 : journal of the Japanese Institute of Landscape Architecture
5
62
573
576
AN10455955
13408984
https://repository.dl.itc.u-tokyo.ac.jp/record/763/files/land62_5.pdf
jpn