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B-6.3.2 Quantitative Analysis of the Effects of Environmental Factors on the Soil Microbial Community

[Contact Person]

Takao Horikoshi
Professor
Dept. of Environmental Studies, Faculty of Integrated
Arts and Sciences, Hiroshima Univ.
Kagamiyama 1-7-1, Higashi-Hiroshima 739-8521 Japan
Phone: +81-824-24-6509, Fax: +81-824-24-0758
E-mail: takao@ipc.hiroshima-u.ac.jp

Total Budget for FY1996-1998

7,500,000 Yen (FY1998 2,261,000 Yen)

[Key Words]

Fungi, Microbial biomass, Soil, Temperature.

Abstract

In order to study the effect of climatic condition on the soil microbial community and decomposition rate, the difference in the mass loss rate of organic matter (paper and wood chips) was examined along the altitudinal climatic gradient in the subalpine zone of Mt.Fuji. The mass loss rate tended to decrease with increasing altitude. A significant log-linear relationship was observed between the mass loss rate and the annual mean air temperature. Ergosterol, which is a component of membranes of fungal cells in the substrates tended to be smaller with increasing altitude. The difference in the ergosterol content of the moss Hylocomium splendens litter was also examined between forests under different climatic conditions.