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川中丘陵区位于长江上游,为深入了解并充分认识川中丘陵区不同柏木林地植物群落现状,以及群落组成、变化和发展趋势群落特征,并通过生物多样性Smipson指数和Shannon-wienner指数、均匀度指数Pielou指数等指标,对川中丘陵区分布最广的柏木林为主几个不同林地类型进行了研究。结果表明:(1)研究区林地群落层次有乔木层、灌木层和草本层,林层结构简单。其中乔木7科7属11种,灌木29科39属60种,草本35科57属72种。(2)每个林分类型内均有几种优势种或亚优势种,但不同林分类型的优势种类型及其物种均有较大差异。(3)从物种分布频度看,灌木层、草本层和群落的物种总体分布频度大致都符合频度分布定律,属于L形,即低频度的A级占优势,但各个林层的物种频度有较大差异。(4)不同林层植物物种的Shannon-Wiener多样性、物种丰富度指数和生态优势度等多样性指数表明,灌木和草本层都明显高于乔木层,乔木层最小;乔-灌层、乔-草层都具有极显著性差异。
In order to understand and understand the plant community status, community composition, variation and trend of community characteristics in different cedar forests in the hilly area of central Sichuan Basin, the Central Sichuan Hilly Region is located in the upper reaches of the Yangtze River. Based on the Smipson index, Shannon-wienner index, Pielou index and other indicators, the most widely distributed in the hilly area of Sichuan Kashiwagi mainly several different types of woodland were studied. The results showed that: (1) There were arbors, shrubs and herbs in the forest community in the study area, and the structure of the forest was simple. Among them, there are 11 species of 7 genera and 7 families of arbors, 60 species of 39 genera of 29 families and 72 species of 57 genera of 35 families. (2) There are several dominant species or subdominant species in each forest type, but the dominant species types and their species are different in different forest types. (3) According to the frequency of species distribution, the distribution frequency of species in the shrub layer, herb layer and community generally conforms to the frequency distribution law, belonging to the L shape, that is, the low frequency A class predominates. However, There is a big difference in frequency. (4) The Shannon-Wiener diversity, species richness index and ecological dominance index of plant species in different forest layers showed that the shrub and herb layers were significantly higher than the tree layer and the arbor layer was the smallest; - Grass layer has a very significant difference.