全球高山林线研究现状与发展方向
文献类型：期刊论文
| 作者 | 李迈和 ; Norbert Kraeuchi |
| 刊名 | 四川林业科技
 |
| 出版日期 | 2005 |
| 卷号 | 26期号:4页码:36-42 |
| 关键词 | 高山林线 可溶性碳水化合物 林线成因 林线生理生态 生态恢复 全球变化 |
| 其他题名 | The State of Knowledge on Alpine treeline and Suggestions for Future Research |
| 通讯作者 | 李迈和 |
| 合作状况 | 其它 |
| 中文摘要 | 当山体达到一定高度时出现的森林分布上限——高山林线，归根结底是一条低温界限。逾百年高山林线的观测与研究，旨在阐明高山林线成因以恢复气候高山林线。迄今出现的各种（可归为5类）高山林线成因假说，虽然每一种都可以解释一定地域的高山林线现象，但在全球尺度上，仍然缺乏一种可以普遍解释全球高山林线现象的假说和理论。另外，由于高山区域较少的人类干扰及短（海拔）距离内显著的环境因子梯度、结合高山林线特殊的结构、功能及对气候变化的高度敏感性，林线研究已经成为全球气候变化研究的热点区域之一。本文综述了全球高山林线知识现状，并对将来高山林线研究提出了一些建议。 |
| 英文摘要 | T he hig h altitude limit of forest s, commonly referred to as treeline, t imberline or forest line, represents one of the most obv ious vegetat ion boundaries. In reality the t ransit ion f rom the uppermost closed montane forest s to the t reeless alpine vegetation is commonly not a line, but a steep gradient of increasing stand f ragmentat ion and stuntedness, often called the alpine t reeline ecotone. Research on alpine treeline has a century-long history, and it is know n that the global hig h altitude treeline phenomenon is caused by thermal limitat ion. For instance, it has been show n that on a global scale, climat ic high alt itude treelines occur at similar grow ing season temperatures ( means f rom 515 to 715 e ) whereas season length varies betw een 215 and 12 months, and many other climatic constraints w hich have been suggested as cont ribut ing to alpine t reeline format ion show large regional variat ion. Hence, f ive g roups of hypothesis of treeline format ion have been sugg ested on a local or regional scale: 1) the thermal limitat ion hypothesis; 2) the st ress hypothesis; 3) the disturbance and g row th limitat ion hypothesis; 4) the reproduct ion hypothesis, and 5) the carbon balance hypothesis. How ever, the mechanism, w hich could dictate a climate-driven t ransit ion from forests to the alpine life zone, is st ill not know n. Hence, a conclusive funct ional explanation of t reeline formation on a global scale is st ill aw aited. Moreover, in a changing w orld, the alpine life zone is one of the most fascinat ing reg ions for scient ific research, due to 1) the steep environmental gradients w ithin a short distance on a slope, 2) lit tle human influence at hig h elevations, and 3) the hig h sensitivity of alpine plant s and their communit ies to a g lobal change. |
| 分类号 | S718.5 |
| 语种 | 中文 |
| 公开日期 | 2010-07-16 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/824]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） |
| 推荐引用方式 GB/T 7714 | 李迈和,Norbert Kraeuchi. 全球高山林线研究现状与发展方向[J]. 四川林业科技,2005,26(4):36-42. |
| APA | 李迈和,&Norbert Kraeuchi.(2005).全球高山林线研究现状与发展方向.四川林业科技,26(4),36-42. |
| MLA | 李迈和,et al."全球高山林线研究现状与发展方向".四川林业科技 26.4(2005):36-42. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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