Structural and floristic variation among small replicate plots of a tropical montane forest on Mount Kinabalu, Sabah, Malaysia
Structural and floristic variation among small replicate plots of a tropical montane forest on Mount Kinabalu, Sabah, Malaysia
复制标题
DOI：
10.3759/tropics.15.219
复制
发表时间：
2006-01-01
期刊：
影响因子：
0.7
通讯作者：
Kitayama, Kanehiro
中科院分区：
文献类型：
--
作者：
Aiba, Shin-ichiro;Suzuki, Eizi;Kitayama, Kanehiro
我们研究了森林结构，物种多样性和植物区系组成的树木不同的最小尺寸（>= 4.8厘米和= 10厘米茎直径）在6个0.25公顷的地块的热带山地森林（海拔1600米）的京那巴鲁山，沙巴，马来西亚。四个地块是2.74公顷地块的一部分，两个分别位于75米和200米处。在所有的六个地块分布在一个面积约8公顷（450米175米）的类似地形（边坡）。森林结构（E。G.树干密度、断面积和估计的地上生物量）似乎在6块地之间相似。每个小区的树种丰富度变化不大（直径大于4.8 cm的树干为91 - 102个，直径= 10 cm的树干为60 - 72个）。物种多样性（或均匀度）的几个指数也在狭窄的范围内，与物种丰富度。6个样地的物种优势度差异较大，但属和科的优势度相对一致。基于2.74公顷地块的分析表明，这反映了不同的栖息地协会与微地形之间的同类或同科物种和种内聚集。基于物种存在/不存在的相似性指数（e. G. Jaccard和Sorensen指数）与样地之间的空间距离（茎直径>= 4.8 cm）呈负相关，但基于物种相对多度的指数与样地之间的空间距离不相关。基于断面积的物种多样性（或均匀度）和相似性指数在两个最小尺度（>= 4.8 cm和>= 10 cm直径）之间相关，但基于茎数或物种存在/不存在的物种多样性（或均匀度）和相似性指数不相关。我们的结论是，在属和科的水平上的森林结构，树种多样性和植物区系组成的变化是小的，在这个空间尺度上，在任何一个单一的0.25公顷的地块获得的结果可以合理地外推到其他类似的地形在这方面的立场，除了优势的物种。
We examined the variation in forest structure, species diversity and floristic composition of trees for different minimum sizes (>= 4.8 cm and = 10 cm stem diameter) in six 0.25-ha plots of a tropical montane forest (1600 m above sea level) on Mount Kinabalu, Sabah, Malaysia. Four plots are parts of a 2.74-ha plot, and two are located 75 m and 200 m apart from the others. In all, the six plots are distributed in an area of approximately 8 ha (450 m 175 m) on similar topography (sideslopes). Forest structure (e. g. stem density, basal area and estimated aboveground biomass) appeared to be similar among the six plots. Tree species richness per plot varied little (91-102 for stems > 4.8 cm diameter and 60-72 for stems = 10 cm diameter). Several indices of species diversity (or evenness) were also within narrow ranges, correlated with species richness. The dominance of species varied greatly among the six plots, but that of genus and family was relatively consistent. Analysis based on the 2.74-ha plot suggested that this reflected dif ferent habitat associations with microtopography among congeneric or confamilial species and intraspecific aggregation. Similarity indices based on presence/absence of species (e. g. Jaccard and Sorensen indices) were negatively correlated with spatial distances between plots (for stems >= 4.8 cm diameter), but those based on relative abundance of species were not. Indices of species diversity (or evenness) and similarity based on basal area were correlated between two minimum sizes (>= 4.8 cm and >= 10 cm diameter), but those based on number of stem or presence/absence of species were not. We concluded that variations in forest structure, tree species diversity and floristic composition at genus and family levels were small at this spatial scale, and that the results obtained in any single 0.25-ha plot can be reasonably extrapolated to the other stands on similar topography in this area except dominance of species.