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題 名 | 霧頭山自然保護區天然植群主要樹種林分結構之研究=A Study on the Stand Structure of the Major Tree Species in Wutoushan Natural Reserve |
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作 者 | 陳朝圳; 吳守從; | 書刊名 | 國立屏東科技大學學報 |
卷 期 | 7:2 1998.06[民87.06] |
頁 次 | 頁115-123 |
分類號 | 436.12 |
關鍵詞 | Weibull機率密度函數; 植群動態變化; 樹種組成; Weibull probability density function; Vegetation dynamics; Species component; |
語 文 | 中文(Chinese) |
中文摘要 | 本文以霧頭山自然保護區為範圍,設置60個永久樣區,於78年、83年兩次 之樣區調查資料中,選取其中出現頻率最高之11種樹種為材料,應用Weibull機率 密度函數之B、C值,配合相關統計方法,探討研究區內主要樹種林分結構之動態性 變化。由研究結果得知,各主要樹種每公頃平均立木材積以鐵杉最高,臺灣赤楊次之, 顯示此兩種樹種分別為研究區內鐵杉與臺灣赤楊植物社會之優勢種,且其直徑最大; 而楠木類及櫧櫟類之樣區出現率最高,顯示研究區內之植物社會係以樟科、殼斗科與 其它闊葉樹形成共優勢種。 各樹種依材積級劃分之後,以歐幾里得距離平方法進行分類,可區分為三型,其 中第一型之大徑級立木稀少,且其林分蓄積量與立木株數無顯著相關,此類型以紅花 八角為代表;第二型之大徑級立木在蓄積量多之林分中佔有較高之株數,而其株數隨 著林分蓄積量的下降而遞減,此種型態之樹種以假長葉楠為代表;第三型樹種在不同 的林分蓄積量中,各徑級立木株數之比例差異不大,但其林分蓄積量大小與立木株數 之總和有關,此類型林木包括錐果櫟、長尾尖櫧、黃杞、柃木、瓊楠、長葉木薑子、 臺灣樹參、臺灣赤楊、鐵杉等。 為尋求各樹種立木材積生長量與地理因子間之相關性,以無母數統計之Kendall's 等級相關分析進行探討,結果顯示紅花八角、柃木、瓊楠、長葉木薑子等四種樹種,其 材積生長量與海拔高具有極顯著相關;錐果櫟、臺灣樹蔘這兩種樹種之材積生長量則與 坡度有顯著之相關;紅花八角、錐果櫟之材積生長量與坡向呈顯著相關。 研究區主要樹種之直徑分布以Weibull 機率密度函數進行配置後,除鐵杉外,各 樹種均以中小級徑木居多;而其林分結構之型態,各樹種均為鐘形右偏歪之曲線。以 無母數之Kolmogorov-Smirnov測驗進行檢定後顯示,各主要樹種之直徑分布,除黃 杞外,其餘各樹種之直徑分布與生長,均有明顯之動態變化。 |
英文摘要 | Sixty permanent quadrates built in 1989 at the natural forest of Wutoushan nature reserve were inventoried in 1989 and 1994. Eleven major tree species wer chosen as materials to study the dynamics of the stand structure of major species using B.C parameters of Weibull probability density function and statistical methods. It was found that Tsuga chinensis and Aluns formosana had higher stand volumes, which indicated that they were dominants in Tsuga chinensis forest type and Aluns formosana forest type, respectively. The Lauraceae and Fagaceae had higher frequency in the study area, which indicated that there were codominants in plant society. After ranking the stand volume, the tree species were classified into three types by squared Euclidean distance method. Most of Type Ⅰ were small timbers and their volume were not correlated with scalar, Illicium arborescens was the representative. For Type Ⅱ , the more stand volume the more large timbers, Persea japonica was the representative. for Type Ⅲ, the stand volume was correlated with the quantity of timbers, Cyclobalanopsis longinus, Castanopsis carlesii, Engelhardtia roxburghiana, Eurya japonica, Beilschmiedia erythrophloia, Litsea acuminata, Dendropanax pellcidopunctata, Alnus formosana and Tsuga chinensis were the representative. Using Kandell's tau-b method to study the relationship between volume increment and geographic factors, it showed that Illicium arborescens, Eurya japonica, beilschmiedia erythrophloia, and Litsea acuminata were correlated with altitude, Cyclobalanopsis longinus and Dendropanax pellcidopunctata were correlated with slope; Illicium arborescens and Cyclobalanopsis longinus were correlated with aspect. The diameter distribution of tree species were simulated by B and C parameters of Weibull probability density function. The results showed that all the tree species got a right skewed. The D.B.H. of tree species were mostly less then 30 centimeter except Tsuga chinensis. All tree species were significant variant except Engelhardtia roxburghiana. |
本系統中英文摘要資訊取自各篇刊載內容。