人倫柳杉人工林動態樣區複查計畫

簡介

疏伐是對林地內樹木的密度、品質或分佈進行部分的砍伐移除，對於森林結構及物理環境可以造成立即的變化。這些微環境的改變，短時間內造成原本生態系結構的改變，往往有利於其他樹種的種子發芽、幼苗生長，增進森林生態系的生物多樣性。人倫柳杉人工林動態樣區於2006年完成第一次每木調查，並於2007年進行25%與50%疏伐。本計畫為疏伐後第一次複查，自2011年7月起至2012年3月止，已完成12ha之複查作業，並已完成資料輸入及結果分析。本研究結果顯示，疏伐處理後的柳杉胸高直徑相對生長速率及總生物量改變程度皆大於未疏伐樣區內的植株。疏伐樣區經過5年後，植株數量已回復到與疏伐前相當，其中50%疏伐樣區內新增苗木大部分屬於陽性樹種，其種類、數量與分布範圍與疏伐前有顯著差異。 Thinning is the removal of trees to reduce density or distribution of target species. It has immediate effects on forest structure and physical environments. The changes of microhabitat will affect seed germination and seedling growth of native species, as a consequence, will lead to diversity increase in the forest ecosystem. Zenlun Cryptomeria japonica plantation dynamic plot completed the first tree census and thinning at 2006 and 2007, respectively. The thinning procedure removed 50% or 25% of C. japonica in assigned plots. This project carried out the first recensus after thinning. The results showed that thinning increase relative growth rate and total biomass of C. japonica. After 5 years, the abundance in the thinning plots was recovered to the level before thinning. In addition, at 50% thinning plots, most of the recruits (> 1cm DBH) were shade intolerance species. For those plots received thinning treatment, there is a distinct difference in species abundance and distribution pattern before thinning and after thinning.

發布單位：Taiwan Forestry Bureau
發布日期：2020/07/31
資料授權引用格式：Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License
資料集下載：DwC-A

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