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標題: 環山火燒跡地植群變化之研究
Studies on the Vegetation Changed of
作者: 賴靖融
Rung, Lai Jing
關鍵字: fire;火燒;βdiversity;regeneration;succession;β歧異度;天然更新;演替
出版社: 森林學系

In order to comprehend the effect of vegetation composition in forest ecosystem after firing, many forest researchers plan to monitor the burned area in Huanshan area. Pinus taiwanensis is a dominant crowned specie on the burned area. Miscanthus transmorrisonensis, Pteridium aquilinum etc. are dominant pioneer plants in the burned area. Sprouted plants are helpful to recover the vegetation. The plants, above-mentioned, play very important roles in the primary stage of succession. Dominant herbaceous plants would fade and the plant remains would become fuel during the drought. Therefore, it is easy to occur another fire. It make α diversity decreased for the primary stage of the fire, but it has became better after 18months. β diversity is related to the difference of the altitude. The environment factor, the altitude and the WLS would affect the composition and distribution of the plants. Due to the large niche of the Pinus taiwanensis, Miscanthus transmorrisonensis and Rhododendron noriakianum, the distribution of the spices is very widespread in the area.
The mortality of the Pinus taiwanensis would increase with the fire intensity. Because Pinus taiwanensis have no sprouted ability, the mortality after firing is about 76.71%. However, the hardwood species have sprouted ability, the mortality after firing is only 3.6%. Moreover, the soil could help the buds to suffer from other injures, so most of the hardwood species would based sprout. Although the mortality of Pinus taiwanensis is very high, Pinus taiwanensis could exist by regeneration which are stored into the cone. Increasing lightness, increasing temperature difference and uncovered soil after firing would be helpful for the plants to regenerate and sprout. Therefore, the number of the regeneration in the burned area is higher than checker area. The lightness is stronger, and the seedling grows better. However, the value of the relative humidity content would affect the mortality of the seedlings. In vegetation in the burned area, water quality, soil, and insect aspects, it reveals that the burned area has already been recovered naturally and tended to be a stable situation. Consequently, it should be reforested succession naturally, not reforested by hand.
Appears in Collections:森林學系

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