https://scholars.lib.ntu.edu.tw/handle/123456789/137665
標題: | 評估非生物因子及玉山箭竹對於臺灣?杉?植群組成之影響 Abiotic Factors and Yushania Influences on Abies Forest Composition in Taiwan |
作者: | ?政道 陳子英 謝長富 邱祈榮 Lin, C.T. Chen, T.Y. Hsieh, C.F. Chiou, C.R. |
關鍵字: | 臺灣?杉、非生物性因子、植群組成、多變?分析、結構方程模式、玉山箭竹。Abies kawakamii, abiotic factor, vegetation composition, multivariate analysis, structural equation model (SEM), Yushania niitakayamensis. | 公開日期: | 九月-2014 | 卷: | 59 | 期: | 3 | 起(迄)頁: | 247-261 | 來源出版物: | Taiwania | 摘要: | 在臺灣高海拔山區,臺灣?杉(Abies kawakamii (Hayata) Ito)為優勢構成的森?分 布於海拔三千公尺以上的山地。其植群組成資??源為國家植群多樣性調查與製圖計畫資 ?庫(簡稱國家植群資?庫),而環境因子則是使用 WorldClim 及國家植群資?庫。我們 使用非計?多元尺?法(non-metric multidimensional scaling)?鑑別臺灣?杉?的物種組 成,並使用結構方程模式?確認臺灣?杉?與環境因子及玉山箭竹間的複雜因果關係。分 析的結果顯示臺灣?杉植群的組成受到棲地的岩石地比?、熱荷指?(heat load index)、 溫?指?(warmth index)以及冬、夏季的?水等影響。結構方程模式之結果則證實?溫? 指?及冬季?水是決定潛在變?—氣候的主要驅動變?,而氣候則是影響臺灣?杉?上層 植物組成的顯著的因子。玉山箭竹的相對頻?則是對冠層組成具有部分影響。對於地被植 群??,玉山箭竹的相對頻?則具有高?相關且明顯的影響,而其頻?本身則是受到土壤 含石?及冬季?水的影響。此外,冠層植群組成對於地被具有負值且?顯著的相關係?, 這可能肇因於臺灣高海拔地區破碎及?質性棲地的影響。 Abies kawakamii forests are generally distributed above 3,000 m in Taiwanese high mountains. The community data used in our analysis were derived from the database of the National Vegetation Diversity Inventory and Mapping Project of Taiwan (NVDIMP), and environmental data were obtained from the WorldClim and NVDIMP databases. We used non-metric multidimensional scaling (NMDS) to identify vegetation composition of Abies communities and the structural equation models (SEMs) were used to examine the complex relationships between environmental factors and vegetation composition. The results of ordination showed the most important factors determining species composition of Abies forests involved habitat rockiness, heat load index, warmth index and summer and winter. SEM results approved the warmth index and winter precipitation were the main drivers determining the latent variable—climate, which significantly affect the overstory composition of Abies communities. The relative frequency of Yushania niitakayamensis also had a minor effect on the overstory. However, the relative frequency of Yushania had strong and significant effects on the understory flora and it was also strongly correlated with rock ratio and winter precipitation. Moreover, the overstory displayed a negative but insignificant coefficient on the understory composition, and this might be attributed to the fragile and high heterogeneous habitat in Taiwanese high mountain areas. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/283332 | DOI: | 10.6165/tai.2014.59.247 |
顯示於: | 生命科學系 |
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5903_201409_7.pdf | 9.47 MB | Adobe PDF | 檢視/開啟 |
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