新化林場柚木林之植群結構分析

COMMUNITY STRUCTURE OF COMMON TEAK PLANTATION IN HSIN-HUA FOREST STATION

本研究以生態方法針對中興大學新化林場第二、三林班柚木林之植群結構及物種歧異度進行調查研究，期供柚木林經營管理之基本參考資料。調查顯示樣區喬木層之植物種類共計有29種，地被層植物則高達115種。矩陣群團分析中若以相似性指數45%作為臨界值，則可將所有樣區歸為同一群，可見所選15個柚木林樣區頗具代表性。物種歧異度之分析顯示：Margalef種豐多度指數（Dmg）達0.90以上，Shannon訊息統計指數（Hsw）達1.11以上，Shannon均勻度指數（Esw）達0.60以上，Simpson種豐富度指數（Dsp’）亦達0.60以上。由種間相關性測驗得知；喬木層植物中之大葉桃花心木少與繁花山柑、香楠等二種植物出現於同一植物社會。另地被層植物中之瑪瑙珠與密毛毛蕨，以及求米草與三葉崖爬藤常出現於同一植物社會。所調查柚木林之直徑階分布概呈反J型分布，顯示柚木在往後之演替階段中，仍將在冠層中佔具優勢地位。 The main point of the research is to do a detail research by using ecological methods about the community structure and species diversity of Common Teak planation at the second and third compartment in Hsin-Hua Forest Station, National Chung-Hsiug University. The research will contribute to be the basic references or Common Teak planation management. In this investigation, 29 species of broad-leaved trees in the upper story and 115 under story plant species were recorded. The results reveal that the species diversity of Margalef’s species richness index is higher than 0.90. Shannon's information statistic index is higher than 1.11, Shannon's evenness index is higher than 0.60, Simpson's species abundance index is higher than 0.60. By the analysis of correlation between species. Swietenia macrophylla don't belong to the same plant community as Capparis floribunda and Machilus zuihoensis in the upper story. In the under story. Solanum capsicatrum with Christella parasitca and Oplismenus undulatifolius with Tetrastigma formosanum usually belong to the same plant community. The pattern or DBH distribution or Common Teak plantation is in contrary J-type, it shows that the Common Teak will also lake the dominant role of crown level during the successional stage in the future.

The main point of the research is to do a detail research by using ecological methods about the community structure and species diversity of Common Teak planation at the second and third compartment in Hsin-Hua Forest Station, National Chung-Hsiug University. The research will contribute to be the basic references or Common Teak planation management. In this investigation, 29 species of broad-leaved trees in the upper story and 115 under story plant species were recorded. The results reveal that the species diversity of Margalef’s species richness index is higher than 0.90. Shannon's information statistic index is higher than 1.11, Shannon's evenness index is higher than 0.60, Simpson's species abundance index is higher than 0.60. By the analysis of correlation between species. Swietenia macrophylla don't belong to the same plant community as Capparis floribunda and Machilus zuihoensis in the upper story. In the under story. Solanum capsicatrum with Christella parasitca and Oplismenus undulatifolius with Tetrastigma formosanum usually belong to the same plant community. The pattern or DBH distribution or Common Teak plantation is in contrary J-type, it shows that the Common Teak will also lake the dominant role of crown level during the successional stage in the future.