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为进一步了解茂兰自然保护区四药门花群落乔木层优势种群对群落资源的利用和占据空间的能力,采用样方调查方法,对四药门花群落乔木层的优势种生态位特征进行研究。结果表明:(1)群落中四药门花、西桦、香叶树和虎皮楠具有较大的生态位宽度,分别为1.369、1.347、1.325、0.944;(2)生态位相似性比例<0.5的占总对数的70%,物种对环境资源的要求差异性较大;(3)生态位重叠度<0.5的占总对数的60%,群落中种间竞争并不激烈,处于相对稳定的状态;(4)生态位宽度与生态位相似性、生态位重叠度并无明显关系,主要与物种自身的生物学特性、所处的生境以及利用环境资源的能力有关。
In order to further understand the utilization and occupancy of community resources of dominant populations in the arbor layer of the four medicinal plants in the Maolan Nature Reserve, the niche characteristics of dominant species in the arbor layer of the four medicinal plants . The results showed as follows: (1) The community niche breadth, the birch, the gentian and the tiger bark had a larger niche breadth, which were 1.369, 1.347, 1.325 and 0.944, respectively; (2) the niche similarity ratio 0.5 accounted for 70% of the total logarithm, the species of environmental resources requirements are quite different; (3) the niche overlap of <0.5 accounted for 60% of the total logarithm, the community species competition is not intense, in a relative (4) There is no significant relationship between niche breadth and niche similarity and niche overlap, which is mainly related to the biological characteristics of the species, the habitats in which it is located and the ability to utilize environmental resources.