| 中文摘要 |
南仁山自然保護區因受地形及東北季風影響，生態環境產生異質性，形成複雜的植物組成及林分結構。本研究以南仁山長期生態研究站所設置之500個10 m × 10 m之次生林樣區為範圍，利用CI-110植物樹冠測量儀，取樣測定葉面積指數（Leaf area index, LAI），統計分析LAI之季節性變化，其目的在於探討不同季節及東北季風對南仁山次生林LAI之影響，並推估LAI值，以供其他長期生態研究之佐證資料。研究結果得知南仁山次生林之LAI平均數為3.39±0.27 m2/m2，以夏季3.93±0.31 m2/m2最高，冬季2.85±0.24 m2/m2最低，冬季之LAI與其他各季節間呈顯著性差異，其與夏季比較下降27.44%，各季節之背風林型與向風林型，因林型內之LAI變異大，使得林型間之LAI差異不顯著。
The Nanjenshan Ecological Research Area (NERA) has been subjected to unusual topography and the Northeast Monsoon for a long time so that its ecological environment, vegetation composition and forest stand structures have become extremely complicated. In this study a total of 500 10 m × 10 m plots allocated in the NERA secondary forest stands were used, the leaf area index (LAI) estimating from CI-110 plant canopy analyzer as well as seasonal variations of LAI were calculated from the survey data. The purpose of the investigation was to assess quantitatively the variation of the Northwest Monsoon and season upon the LAI of the secondary forest in NERA. The LAI of Nanjenshan secondary forest was 3.39 ±0.27 m2/m2.1n summer, the LAI (3.93 ± 0.31 m2/m2) was the highest while in winter (2.85 ± 0.24 m2/m2) was the lowest. The LAI of winter was significantly different from those of other seasons and it downed 27.44% from that of in summer but the difference of LAI between leeward and windward was non-significant for each season, due to the high variation of LAI in forest type. |
| 英文摘要 |
The Nanjenshan Ecological Research Area (NERA) has been subjected to unusual topography and the Northeast Monsoon for a long time so that its ecological environment, vegetation composition and forest stand structures have become extremely complicated. In this study a total of 500 10 m × 10 m plots allocated in the NERA secondary forest stands were used, the leaf area index (LAI) estimating from CI-110 plant canopy analyzer as well as seasonal variations of LAI were calculated from the survey data. The purpose of the investigation was to assess quantitatively the variation of the Northwest Monsoon and season upon the LAI of the secondary forest in NERA. The LAI of Nanjenshan secondary forest was 3.39 ±0.27 m2/m2.1n summer, the LAI (3.93 ± 0.31 m2/m2) was the highest while in winter (2.85 ± 0.24 m2/m2) was the lowest. The LAI of winter was significantly different from those of other seasons and it downed 27.44% from that of in summer but the difference of LAI between leeward and windward was non-significant for each season, due to the high variation of LAI in forest type. |
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