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| Hiroaki Ikeda | |
| National Institute of Agro-Environmental Sciences | |
| Ministry of Agriculture, Forestry and Fisheries | |
| Kannondai, Tsukuba, Ibaraki, 305-8604, JAPAN | |
| Phone +81-298-38-8312; Fax +81-298-38-8199 | |
| E-mail ikedah@niaes.affrc.go.jp |
14,118,000 Yen
(FY 1999; 4,838,000 Yen)
To estimate changes in plant community patterns such as succession and distribution, we classified the vegetation around the Senjogahara moor in the Nikko National Park, Tochigi Prefecture, Japan, using Landsat TM data on 28 July 1986 and 19 July 1997. The area of wetlands was reduced from 1986 to 1997. On the other hand, the areas of grassland and Sasa community increased and the maximum dimension of mufti-fractal spectrum of their spatial distributions also increased. To relate the mufti-fractal spectrum of spatial distribution with interaction between populations, we developed a neighborhood-based lattice model as the Vegetation Structure Model, simulated with different levels of competition intensity and competitive asymmetry, and analyzed the multi-fractal spectrum of the spatial distribution of a steady state. The maximum dimension of multi-fractal spectrum of their spatial distributions increased with increasing levels of competition intensity and/or competitive asymmetry, suggesting that we can obtain model parameters of interaction between individuals for the neighborhood-based lattice model from the multi-fractal properties of vegetation distributions which were estimated using satellite data.
Landsat TM data, Multi-fractal spectrum, Vegetational change, Wetland