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河岸带是森林小流域单元的重要组成部分之一。由于河水的影响和边缘效应等因素的综合作用,河岸带植物群落与远离河岸带的森林群落在组成、结构和分布格局等方面存在较大差异,其群落最小面积也不同。本文对长白山原始阔叶红松林河岸带植物群落最小面积和物种丰富度进行了探讨。结果表明河岸带植物群落的最小面积均小于森林内部植物群落的最小面积。对于长白山原始阔叶红松林群落而言,在河岸带,包括群落的60%、80%、90%植物种类时的平均最小面积分别为80m2、180m2和320m2左右;;对应于远离河岸带的森林内部,包括群落的60%、80%、90%植物种类时的平均最小面积分别为260m2、380m2和480m2左右。河岸带植物群落的物种丰富度、均匀度和Shannon-Wiener指数普遍高于森林内部植物群落,但优势度则相反。表4参20。
The riparian zone is one of the important components of a forest catchment. Due to the combined effects of river water and edge effects, there are great differences in composition, structure and distribution pattern between the riparian plant communities and the forest communities away from the riparian zone, and the minimum area of the communities is also different. In this paper, the minimum area and species richness of plant community in the original broad-leaved Korean pine forest in Changbai Mountains were discussed. The results showed that the minimum area of riparian plant community was less than the minimum area of the plant community inside the forest. For the original broad-leaved Korean pine forest community in Changbai Mountain, the average minimum area of 60%, 80% and 90% of the plant species in the riparian zone is 80m2, 180m2 and 320m2, respectively; including the forest far away from the riparian zone The average minimum area for the interior, including 60%, 80%, 90% of the plant species, is 260m2, 380m2 and 480m2, respectively. The species richness, evenness and Shannon-Wiener index of the riparian plant community are generally higher than those within the forest, but the dominance is opposite. Table 4 Reference 20.