Forest Management of Aborigines Tao in Lanyu (botel Tabago) and Its Effects to Forest Structure and Species Composition

27 Mar Forest Management of Aborigines Tao in Lanyu (botel Tabago) and Its Effects to Forest Structure and Species Composition

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Abstract

蘭嶼達悟族的森林作業，多採取擇伐作業之多數種混淆林經營模式，並有完整的更新（天然更新、林下栽植等）、撫育（除草、除蔓、疏伐等）措施。果樹林之樹種多樣性較低，但大面積用材林之生物多樣性僅略低於天然林，其林分整體構造完整，分佈著各式不同徑級之林木，顯示其為多層次之林分，不乏各徑級之更新幼木，形成多樣且穩定性高的多齡級複層林結構，符合永續經營森林之理念。多數主要目標樹種之徑級結構呈反J字型，例如番龍眼、檳榔、麵包樹及毛柿，表示其更新狀況良好：但欖仁舅、綠島榕及欖仁則缺少10m以下小徑木，呈現更新不良之現象，有必要加強其更新作業。

English Abstract

According the ways of selective cutting and multiple species management, the forest of Lanyu (Botel Tabago) was well cared by aborigine Tao. Most of the systems of modern silvilculture treatment including weeding, limbing, thinning and plantation were also well done by Tao. The structure of fruit production forest was simple, and their woody species diversity was low while compare to nature forest. However, the structure and woody species diversity of timber (for house and boat building) production forest were similar to nature forest which have multiple layers of vegetation profiles and high species diversity. The forest of Lanyu (Botel Tabago) was well management by Tao, and fitted the idea of sustainable management, although a few species, such as Neonauclea reticulata, Ficus pubenervis, and Terminalia catappa had fewer seedling and saplings in the sampled forestland.