The Changes of Soil Microarthropoda at the Burned Areas by Forest Type

임상별(林相別) 산화지역(山火地域)의 토양미소절지동물(土壤微小節肢動物) 변화(變化)

This study was carried out to examine and compare the changes of inhabitation of soil microarthropoda after forest fire between different types of forest; i.e. the coniferous forest (Mt. Chocdae) and the broad-leaved forest (Samsinbong in Mt. Chiri). The individuals of soil microarthropoda found at the burned and unburned areas of Samsinbong and Mt. Chocdae were 12 orders in 5 classes, and individuals of Insecta and Arachnida 98% of them. In respect of classification groups, Collembola order was high at the burned and unburned areas of coniferous forest, while Acari order was high at the broad-leaved area. When classified by soil depth, the total number of soil microarthropoda individuals inhabiting at Samsinbong, the broad-leaved forest, was 25,342 and 37,350 at 1~5cm depth of burned and unburned areas respectively, while at 5~10cm depth the number turned out 9,722 and 15,906. Soil microarthropoda individuals of unburned area was 1.6 times higher than for the burned area. At the coniferous forest, the number marked 31,665 and 51,431, respectively for 1~5cm depth of burned and unburned area, and 10,189 and 13,202 for 5~10cm depth. Here also, the number for the unburned area was examined to be 1.4 times higher than for the burned area.

서로 다른 임상내에 산불이 발생한 후 시간이 경과함에 따라 산림토양에 서식하는 토양미소절지동물의 개체수변화를 조사 비교하였다. 토양미소절지동물의 개체수는 활엽수림인 삼신봉과 침엽수림인 촛대산의 산화지와 비산화지에서 5강(綱) 12목(目)이 각각 출현하였으며, 곤충강(綱)과 거미강(綱)의 개체수가 98%로 높게 나타났다. 토양미소절지동물상의 분류군별 구성비는 침엽수림의 산화지와 비산화지에서는 톡토기목(目)이 높게 나타났으며, 활엽수림의 산화지와 비산화지에서는 응애목(目)이 높게 나타났다. 삼신봉지역의 산화지와 비산화지 토양미소절지동물 총개체수는 표토층 1~5cm의 산화지에서 25,342개체, 비산화지에서 37,350개체, 표토층 5~10cm의 산화지에서 9,722개체, 비산화지에서 15,906개체로 나타나 비산화지에서 1.6배 많았다. 촛대산지역에서는 표토층 1~5cm의 산화지에서 31,665개체, 비산화지에서 51,431개체, 표토층 5~10cm의 산화지에서 10,189개체, 비산화지에서 13,202개체로 나타나 비산화지에서 1.4배 많은 개체가 조사되었다.