The purpose of this study aimed to study effects of fire on vegetation and soil properties after the first growing season in Mt. Chiak.
1. With the basis of importance value of species in each stand, status of species was assessed for three categories; Increaser species, Decreaser species, and Neutral species.
2. Biomass was 2.2 times higher on burned area than unburned. This indicates that biomass was remarkably increased after fire.
3. To evaluate similarity, coefficients of similarity among communities were obtained, and correlation coefficients were also estimated. These indices showed that burned and unburned community were markedly different, B_1-stand and B_2-stand appeared most similar to each other among stands.
4. Species diversity was greater in burned than unburned stands.
5. Soil pH value and organic matter content in burned area were significantly higher than those in unburned area. However, soil water content was lower in burned area. There was no effect of burning on soil pH value and water content at 15∼20㎝ depth of soil.
6. All chemical compositions except sodium were much higher in soil surface. The decreases in sodium levels at surface were probably resulted from the rapid leaching due to the increased solubility and decreased capacity for adsorption of sodium in comparison with potassium or calcium. Among chemical compositions of soil amount of nitrogen showed least difference between the burned and unburned surfaces soil.
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