Dominance, diversity and distribution of lianas in Yasuni, Ecuador: who is on top?
Dominance, diversity and distribution of lianas in Yasuni, Ecuador: who is on top?
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DOI：
10.1017/s0266467402002559
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发表时间：
2002-11-01
影响因子：
1.4
通讯作者：
Burnham, RJ
中科院分区：
文献类型：
--
作者：
Burnham, RJ
对厄瓜多尔亚苏姆国家公园和华欧拉尼民族保护区的藤本植物进行了取样，从12个1公顷的样地中提取0.2公顷的亚样本。通过调查和植物标本馆的收集，估计公园和保护区藤本植物的物种丰富度接近500种。寒地生境的物种丰度显著高于河漫滩生境，但不同生境间的茎密度差异不显著。藤本植物种类最多的是虎杖木。和Hoehne （Fabaceae）在洪泛区和陆地上的栖息地，占普查样地所有茎的10%以上。稀有性分析表明，12个样地的藤本植物种类在地理范围上均不罕见，在种群大小和生境特异性上也不罕见。利用丰度排序，结合样地间物种分布的变异系数，确定了Yasum森林中38种占优势的物种（寡头结构）。
Lianas of Yasum National Park and the Huaorani Ethnic Reserve, Ecuador were sampled using 0.2-ha subsamples from 12 1-ha plots. Using surveys and herbarium collections, the total species richness of lianas in the park and reserve is estimated to be close to 500 species. Terra firme habitats are significantly more species rich than floodplain habitats, but density of stems is not significantly different between habitats. The most abundant liana species is Machaerium cuspidatum Kuhlm. & Hoehne (Fabaceae) in both floodplain and terra firme habitats, representing more than 10% of all stems in census plots. Analysis of rarity indicates that none of the liana species encountered on the 12 plots is rare in terms of geographic range, and many species are not rare in terms of population size or habitat specificity. The rank order of abundance, combined with the coefficient of variability in species distribution among plots, is used to identify the 38 species (an oligarchy) that dominate forests in Yasum.