Preliminary Study on Soil Animals of Ta Ta-Chia Area

• Main Authors: chun-yi chuan, 莊俊逸
• Other Authors: Chia-Hua Chiang
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/30898432519220734752

碩士 === 國立臺灣大學 === 森林學研究所 === 87 === This object of this study was deal with the soil animal composition, diversity, quantity variation of dominant in the main forest type of Ta-Ta Chia district and difference in soil animal composition and quantity under different forest type. Through the food resources analysis and preliminary construct food chain, in order to provide fundamental data of material cycle and energy research in Ta-Ta Chia district forest ecosystem, the study sites were established in the stand of Tsuga, Yushania-cane and grassland. we observed the data in each month started from March 1998 to february 1999.Total of 546 samples were collected, including 216 dry soil animals, 216 wet soil animals and 24 macrofauna(divided by hand with naked eyes). Total of 2860 soil animals were recorded including macrofauna,middlefauna and microfauna which belongs to 3 phyla, 7 classes, 20 orders, 34 families. According to the previous study, the soil animals in Ta-Ta-Chia belongs to the Alpine coniferous soil animal type. The results shows the order of the soil animal number and group: Tsuga forest>Yushania-cane forest >Grassland.Collembola is the dominant in Tsuga forest. Enchytraeidae is the dominant in Yushania-cane forest and there was no obvious dominant in the Grassland. In this study, the trend of verticle distribution of soil animals number: 0-5 cm>5-10 cm >10-15 cm layer, and there was no obvious difference between 5-10 cm and 10-15 cm layer. Soil animal diversity index are Grassland> Tsuga forest>Yushania-cane forest because there were obvious dominant in the Tsuga and Yushania-cane forest , but no obvious dominant in the Grassland. There is no obvious difference in the the microclimate between the three investigated sites, thus we can not prove that the microclimate is the cause of the difference in soil animal between the three sites; however, within the three sites, there is shown correlation between quantitative of soil animals in Tsuga forest and minimum air temperature, correlation with quantitative of soil animals in Yushania-cane forest and maximum, mean,minimum of air temperature and minimum relative humidity and maximum soil surface temperature. Dominant groups in Tsuga forest and Yushania-cane forest are significant correlation with moisture, organic matter,K,Ca and Mg. The soil animals amount in Grassland are less than other two plots,because the less moisture and organic matter. This study recorded the soil animal groups in these three forest type of Ta-Ta Chia. In order to know practical observation and paper reviews had been done the habit of some of the specific soil animal groups. Through preliminary construction of soil animal food web in Ta-Ta Chia, including food chain range based on the food resources of soil animal and food chain based on the observed interaction of the soil animal.