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標題: Composition and Diversity of Vegetation in Sihyuán Wùkou Area
作者: Shang-Te Tsai
En-Liang Chu
Hsy-Yu Tzeng
Wei-Chih Chen
關鍵字: 中央山脈保育廊道;演替;生物多樣性;豐富度;豐多度;Central Mountain Range Conservation Corridor (CCC);succession;biodiversity;abundance;richness
Project: 林業研究季刊, Volume 37, Issue3, Page(s) 165-180.
The Sihyuán Wùkou area is located at the northwest inland region with the summer rain climate. It consists of different ecological subregions from the north and south side. Therefore, it has complicate biodiversity and stands on the important position to connect the northern landscape of the Central Mountain Range Conservation Corridor (CCC). It was recorded 145 families, 440 genera, and 898 species of vascular plants in the 56 surveyed plots. The species in Rosaceae, Compositae, and Orchidaceae were superior. There were 7 vegetation types classified by the similarity index (SI) of 20%. The Juglans cathayensis type, Machilus japonica-Neolitsea aciculata var. variabillima type, Oreocnide pedunculata type, and Cryptomeria japonica type arose on both the north and south sides. However, the Alnus formosana- Pinus taiwanensis type only arose on the south side, and the Chamaecyparis formosensis type, Phyllostachys makinoi type only arose on the north side. Besides, the Phyllostachys makinoi type on the north side of the Sihyuán Wùkou was in the mid-late succession stage with superior richness. The Juglans cathayensis type on both sides was in the mid-early stage. Fitting in with the geometric series, or the truncated log normal distribution showed that the Machilus japonica-Neolitsea aciculata var. variabillima type, Oreocnide pedunculata type, Cryptomeria japonica type, and Chamaecyparis formosensis type suffered from different kinds of disturbance. The Machilus japonica-Neolitsea aciculata var. variabillima type had superlative diversity. The Oreocnide pedunculata type had superior abundance, but the Cryptomeria japonica type had inferior abundance. The Alnus formosana-Pinus taiwanensis type on the north side of the Sihyuán Wùkou pretty fitting in with the geometric series and partly fitting in with the logarithmic series, the truncated log normal distribution and the broken stick model showed that it was developing in several succession stages. These thorough discussion for the vegetation diversity in this area was expected to provide reference on the relative ecological monitoring and investigation in the future.

Appears in Collections:第37卷 第03期

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