| Summary: | 碩士 === 國立臺灣大學 === 森林學研究所 === 93 === In order to understand the organization of flux from the canopy to soil in 3 forests, this study monitored litterfall dynamics of secondary forest, Japanese cedar plantation, and bamboo plantation in the Wulai area of northern Taiwan from February 2002 to January 2003. Litterfall was collected once a month for 12months (from February, 2002 to January, 2003). Results showed that annual litterfall was 7.13 t/ha/yr, 5.23 t/ha/yr, and 3.67 t/ha/yr for secondary forest, Japanese cedar plantation, and bamboo plantation, respectively, showing these three stands, leaf, which made up 62.2%, 76%, and 55.1% of annual litterfall, was the dominant component of litterfall.
In all three stands, there was a litterfall peak flux occurred in July, 2002, resulting from typhoon disturbance, causing massive amount litterfall. In addition, another litterfall peak of secondary forest and bamboo plantation occurred in the growing season in March, 2002, because a large number of old leaves were replaced by new leaves. Furthermore, in Japanese cedar plantation, its secondary peak of littterfall was caused by the thinning treatment in November, 2002.
This study clearly showed that litterfall for 3 stands in Wulai area were affected by the phenology of dominant trees, as well as typhoon and human disturbance.
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