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題 名 | 高雄縣美濃雙溪熱帶樹木園物種變動之研究=The Changes of Plant Species of Shuanghsi Tropical Botanical Garden in Melong Village, Kaohsiung County |
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作 者 | 楊勝任; 林弘基; 黃尚義; 涂嘉灝; | 書刊名 | 中華林學季刊 |
卷 期 | 43:4 2010.12[民99.12] |
頁 次 | 頁525-541 |
分類號 | 436.1 |
關鍵詞 | 龍腦香科; 優勢度-多樣性曲線; 賓州光臘樹; 雙溪熱帶樹木園; 林分動態; Dipterocarpaceae; Dominance-diversity curve; Fraxinus pennsylvanica; Shuanghsi tropical botanical garden; Stand dynamics; |
語 文 | 中文(Chinese) |
中文摘要 | 雙溪熱帶樹木園位於高雄縣美濃鎮,建立於1935年,全區面積7.56ha,引進不同地區植物約270種。1997年與2008年進行普查,調查胸高直徑1cm以上之木本植物,並計算各樹種之株數與胸高斷面積變化,探討11年中林分組成與結構變化。1997年與2008年每公頃株數分別為254株與1,004株,林分年平均株數增加率為13%;1997年與2008年每公頃胸高斷面積分別為840平方公尺與5,995.30平方公尺,年平均胸高斷面積生長率20%。園區內以胸徑10cm以下之植株佔全林株數的65%,胸徑大於60cm以上者佔全林的1.6%,且大直徑級之林木有減少的趨勢。2008年調查結果,共計有43科101屬130種木本植物,此11年中演替進入的次生樹種計有46種,僅栽植於本園區之珍貴樹種減少至23種。另發現一種密花盾座苣苔,是台灣的固有種,出現於本園區小攔砂霸壁上。本次調查鑑定出春天開花的木犀科賓州光臘樹,胸徑約13-15cm,為臺灣目前僅出現於本植物園的物種。本園區是臺灣唯一栽植龍腦香科植物的地區,目前存有5種,以登吉紅柳桉21株最多,林下出現小苗6株,顯示可天然更新。其餘4種均僅存1株。大花龍腦香、細枝龍腦香有結實但無小苗出現,香桉納士樹與鱗毛白柳桉仍未見花果。全林分優勢度-多樣性曲線顯示種類歧異度上升,但主要優勢物種在11年間以菲律賓欖仁、毛火焰木、菲律賓木薑子與鐵刀木改變最為明顯,顯示雙溪樹木園處於發育階段。 |
英文摘要 | Shuanghsi tropical botanical garden was established in 1935 and planted about 270 species introduced from different regions. This garden has an area of 7.56 ha and located in Melong village, Kaohshiung County. All trees with a dbh≧1 cm had been censused in 1997 and 2008 to assess the stand dynamics and the survival, growth, reproduction of species especially those cultivated trees. During this period, the tree density of 1997 and 2008 were 254 ha^(-1) and 1,004 ha^(-1) respectively, increasing 13% yr^(-1); the basal area of 1997 and 2008 were 840 ha(-1) and 5,995.3 ha(-1), also increasing 20% yr(-1). The proportion of all individuals with dbh≦10 cm were high about 65%, dbh≧60 cm trees were low about 1.6% and still in declining. In 2008, one hundred and thirty nine tree species, including 101 genera and 43 families, were recorded. Fourty six of 130 species are new immigrating species and the introduced species are declining to 23 species. Epithema taiwanensis var. fasciculata (Gesneriaceae), endemic in Taiwan, was found in bluffs of this area. The other new record species, Fraxinus pennsylvanica (Oleaceae), was found along the roadside and only one individual. The family Dipterocarpaceae planted in 1935 only five species had survived and growed well, this family is nowhere to be seen in Taiwan. Among these five species, Shorea polysperma have 21 individuals higher than the other four species and six seedlings are found on the underground, indicating that this species could regenerate its population. Dipterocarpus gracilis and D. grandiflorus have fruits but no seedling, whereas Anisoptera thurifera and Shorea squamata are still not collected their flowers. By dominance-diversity curve, the species diversity increased obviously and four species such as Cassia siamea, Litsea perrottetii, Spathodea nilotica, Terminalia calamnsanai became dominant significiently, demostrating that this garden still belongs to developing stage. |
本系統中英文摘要資訊取自各篇刊載內容。