Spatial pattern dynamics over 10 years in a conifer/broadleaved forest, northern Japan
Spatial pattern dynamics over 10 years in a conifer/broadleaved forest, northern Japan
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DOI：
10.1007/s11258-006-9197-1
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发表时间：
2007-03
期刊：
影响因子：
1.7
通讯作者：
Y. Kubota;H. Kubo;K. Shimatani
中科院分区：
文献类型：
--
作者：
Y. Kubota;H. Kubo;K. Shimatani
本研究调查了在北海道，北方日本的针叶/阔叶混交林在10年期间的林分动态，侧重于空间依赖的补充，死亡率和增长的两个生长型组，落叶阔叶树种和占主导地位的万年青针叶冷杉sachalinensis。林分断面积在10年期间保持不变，而在个别物种水平的成分平衡没有得到证实。单变量和双变量空间分析显示，许多组成物种的聚类。单一物种斑块的情况下，提出了一个模糊的镶嵌共存的冷杉和阔叶树。冷杉和阔叶树聚集分布的趋势是由空间依赖的招聘，而不是死亡率。阔叶树种的新兵与幸存的阔叶树在空间上相关联，而这是不是这样的冷杉。竞争对生长的影响程度在10年的时间里并不一致。阿比斯表现出组间竞争，而不是组内竞争。与此相反，我们发现阔叶树之间的不对称竞争。我们的研究结果表明，Abiesis没有足够的竞争优势，以排除阔叶树，和共存的两个生长型组可能会保持。
The present study investigated stand dynamics during 10-year period in a conifer/broadleaved mixed forest in Hokkaido, northern Japan, focusing on spatially dependent recruitment, mortality and growth of two growth-form groups, deciduous broadleaved species and the dominant evergreen coniferAbies sachalinensis. The stand-level basal area was maintained over the 10-year period, while a compositional equilibrium at the individual species level was not confirmed. Univariate and bivariate spatial analyses revealed clustering of many of the constituent species. The absence of single-species patches suggested an ambiguous mosaic formed by co-occurrence ofAbiesand broadleaved trees. The trend towards an aggregated distribution ofAbiesand broadleaved trees was caused by spatially dependent recruitment rather than mortality. New recruits of broadleaved species were spatially associated with surviving broadleaved trees, while this was not the case forAbies. The degree of competitive effects on growth was not consistent over the 10-year period.Abiesshowed between-groups competition, but not within-group competition. In contrast, we found asymmetric competitions between the broadleaved trees. Our results suggest thatAbiesis not sufficiently competitively dominant to exclude broadleaved trees, and that the co-occurrence of the two growth-form groups might be maintained.