生态学报 |
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| 出 版 社：长白山温带针阔混交林结构与动态的研究 |
| 发表时间：1998,l18（5）:91-96 |
| 台 站：
长白山森林生态系统定位研究站
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| 作 者：吴刚，代力民 |
| 点 击 率：27387 |
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| 关 键 字：物种组成,胸径分布,树木更新,针阔混交林,长白山 |
摘 要：通过10a的定位观测，研究了长白山地区针阔混交林结构的动态变化.树种及其分布基本保持不变.林分密度从404株/hm2降至387株/hm2，而基础面积从44.83 hm2降至43.79 hm2.除色木槭以外，冠层林木的株数降低.优势树种的更新状况不佳.死亡与更新的关系表现在群落中植物组车工内的变化上。当红松开始衰退时，落叶树种的优势明显上升.几种阔叶树的胸径分配与个体的大小相关.不同的胸径等级上的最大增长率与树木本身大小呈负相关.增加的胸径及其向下一个等级发展的趋势，暗示了冠层压迫对高生长的影响.在成熟林的斑块内，树种不断发生变化，而且斑块内具有一定的循环周期：林冠空隙―树木生长---树木成熟---林冠空隙.上层林冠的树种中除色木槭外，都趋向于减少种群数量.并且两种不同的更新方式和分布范围揭示了树种更新的间断性.在群落的衰退阶段，树种的交替受优势树种变化的影响.
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| 关 键 字(英文)：species composition ,DBH distribution ,regenration,deciduous-conifer mixed forest,Changbai Mountain |
摘 要(英文)：The changes in structure of a decidupus-conifer mixed forest in Changbai Mountain, northeast China ,were investigated in a permanent plot with a 10-year interval.Species and size distribution remained almost no changes.Stand density was reduced from 404 to 387 syem/hm2,and basal area from 44.83 to 43.79 hm2.Allspecies in high canopy-layer except Acer mono decreased in number of stems.The regeneration of the dominant species was poorly represented.The death-recruitment relationship showed that the community was changing in conposition.The dominance of deciduous components tended increasing while Pinus koraiensis was declining .The stand is considered a patch in its matured phase,and species change was in proceeding
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