长白山岳桦―苔原过渡带动态与气候变化 |
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| 出 版 社：地学前缘 |
| 发表时间：2002，9（1） |
| 台 站：
长白山森林生态系统定位研究站
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| 作 者：周晓峰，王晓春，韩士杰，邹春静 |
| 点 击 率：26239 |
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| 关 键 字：全球气候变化,岳桦,苔原,过渡带,长白山 |
摘 要：应用样带网格调查法，对长白山岳桦―苔原过渡带上岳桦径级结构、分布格局以及过渡带的环境因子进行调查，并与近几十年的极端低温进行了对比研究，用格局的差异和径级结构的动态变化来揭示全球变暖对岳桦林―苔原过渡带的影响。结果表明：全球气候变暖对长白山岳桦―苔原过渡带产生很大影响，气候变暖使得岳桦―苔原过渡带中的岳桦分布主要以幼苗和幼树为主，其中岳桦的径级分布呈倒J字型，过渡带中岳桦种群格局呈聚集型分布。整个岳桦种群随着全球气候变暖有一种整体向上迁移的趋势，尤其以岳桦―苔原过渡带最为明显，岳桦―苔原过渡带变宽，岳桦向苔原侵入的程度加剧。
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| 关 键 字(英文)：Global climate change, Betula ermanii, tundra, ecotone, Changbai Mountains |
摘 要(英文)：By using transect net-check, the class structure of Betula ermanii, the distribution pattern and environment factors are studied in the Betula ermanii-tundra ecotone in the Changbai Mountains, and compared with the lowest temperature in recent years. The effect of global climate change on Betula ermanii-tundra ecotone has been demonstrated by the difference of distributions and dynamics of structure. The results show that global climate change has greatly influenced on Betula ermanii-tundra ecotone; the seedling and young tree predominate in the Betula ermanii-tundra ecotone with the global warming up; the class structure show inverse J type; and the pattern exhibits mass distribution. The whole Betula ermanii population have a trend of moving up with the global warming up, which is most evident for the Betula ermanii-tundra ecotone. The Betula ermanii-tundra ecotone broaden with global warming up, and the degree of Betula ermanii invading tundra is more intensive.
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