Typhoons of 1994 Doubled the Annual Litterfall of the Fu-Shan Mixed Hardwood Forest Ecosystem in Northeastern Taiwan

1994年颱風使福山闊葉林的年枯落物量加倍

洪富文(Fu-Wen Horng) ； 游漢明(Han-Ming Yu) ； 馬復京(Fu-Ching Ma)

《林業試驗所研究報告季刊》 10卷4期 (1995/12) Pp. 485-491

https://doi.org/10.7075/BTFRI.199512.0485

摘要

台灣經常遭受颱風侵襲，尤其是在東部及東北部“從1992年3月至1995年2月共3年期間，我們持續的收集福山試驗林闊葉林的枯落物。1994年7月-8月間的強烈颱風後，產生的枯落物量為5,100kg/ha，其中葉枯落物量為2754kg/ha使得當年全年的葉枯落物量及其他枯落物量均較前二年加倍。因此1994年總枯落物量達8,200kg ha^(-1) yr^(-1),是前二年年枯落物量3,000-4,500kg ha^(-1) yr^(-1)的二倍。這種因颱風經常發生所造成的短期大量枯落物的產生，將使該闊葉林的光度、土壤水分、溫度及養分大量增加，有利於苗木從下層生長更新，並不需要形成空隙才能進行森林的更新。

關鍵字

颱風 ； 森林更新 ； 枯落物

並列摘要

Strong typhoons frequently hit the eastern and northeastern regions of Taiwan. From March 1992 to February 1995, annual litterfalls of a mixed hardwood forest were monitored at the Fu-Shan Experimental Forest in northeastern Taiwan. The strong typhoons which occurred in July-August 1994 added an average of around 5,100kg/ha of total litterfall with 2754 kg/ha being leaf litterfall. This amount doubled annual leaf and other litterfalls to 8,200 kg ha^(-1) yr^(-1) in the previous two years. In combination with other evidence, this indicates that the typhoons can trigger a huge positive pulse of light, temperature, soil moisture and nutrients in this forest. This phenomenon favors the regeneration of shade-tolerant tree species by replacement form understory growth, but does not favor the regeneration of pioneer tree species in the gaps of this forest.

並列關鍵字

typhoon ； forest regeneration ； litterfall