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題 名 | Impacts of Disturbance on the Population Structure and Regeneration Status of Tree Species in a Central Himalayan Mixed-Oak Forest, India=干擾對印度中部喜瑪拉雅山Mixed-Oak森林樹種族群結構與更新狀態之影響 |
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作 者 | Pande, Raksha; Bargali, Kiran; Pande, Neerja; | 書刊名 | 臺灣林業科學 |
卷 期 | 29:3 2014.09[民103.09] |
頁 次 | 頁179-192 |
分類號 | 436.12 |
關鍵詞 | 干擾; 更新狀況; 族群結構; Mixed-oak森林; Disturbance; Regeneration status; Population structure; Mixed-oak forest; Kumaun Himalaya; |
語 文 | 英文(English) |
中文摘要 | 本研究是探討干擾梯度對mixed-oak森林樹種族群結構與更新狀態之影響。族群結構包含幼苗,桿材密度和不同體積大小之林木,更新狀況則取決幼苗,桿材和林木族群之數量。樹種如Quercus leucotrichophora A. Camus和Q. floribunda Lindl在所有之試驗地上出現經常性之更新,但是樹種如位在未經干擾地上之Lyonia ovalifolia (Wall) Drude、Acer oblongum Wall ex DC.和輕微干擾地上之Cornus macrophylla Wall ex Roxb. (undisturbed site)則僅出現單一大小之個體,顯示後者之出現是為偶然之情形。更新型式顯示適度的干擾增加幼苗和桿材之密度,減少林木之數量。倒J分佈形狀顯示出在未甘擾地上有良好之更新狀況,但在中度和強列干擾地上更新狀況則為普通。 |
英文摘要 | An attempt was made to study the effects of disturbance on the population structure and regeneration status of tree species in a mixed-oak forest along a disturbance gradient. Population structures were evaluated on the basis of the densities of seedlings, saplings, and trees of different size classes, while the regeneration status was determined from the population sizes of seedlings, saplings, and trees. The population structures of "Quercus leucotrichophora" A. Camus and "Q. floribunda" Lindl. showed frequent reproduction at all sites. However, tree species like "Lyonia ovalifolia" (Wall) Drude, "Acer oblongum" Wall ex DC. (at the undisturbed site), and "Cornus macrophylla" Wall ex Roxb. (at the moderately disturbed forest) were represented by single size class which indicated their accidental presence. The regeneration pattern suggested that moderate disturbance increased the densities of seedlings and saplings but reduced the tree density. A reverse J-shaped curve indicated a good regeneration status at the undisturbed site, while moderately and highly disturbed sites showed fair regeneration statuses. |
本系統中英文摘要資訊取自各篇刊載內容。