岷江上游退化植被恢复演替过程中优势种群空间分布格局研究

Spatial Patterns of Main Species of the Degenerate Community in the Recovering Succession of Upper Reaches of Minjiang River

采用扩散系数、T检验、聚集指数、平均拥挤度、聚块性指数、Green指数和聚集强度等7 项指标对岷江上游滇榛、杭子梢和辽东栎3个优势种群在不同恢复演替阶段的空间格局进行了分析. 结果表明: 3 个优势种群在不同恢复群落内都呈较强的聚集分布, 聚集强度和聚集面积都随恢复时间的延长而增加, 人工恢复16 年群落具有较高的聚集强度, 自然恢复群落具有较高的聚集面积. 优势种群的格局类型、聚集强度以及分布格局的动态变化都表明有效的恢复措施使群落向着稳定的方向发展.

In this paper, the distribution patterns and dynamics of the main species such as Corylus yunnanensis, Camphlotropis macrocarpa, Quercus liaotungensis in different vegetation restoration stages of Upper Reaches of Minjiang River were studied with seven indexes, such as dispersion index, T-test, clump index, mean crowding intensity, patchiness index, Green index and clump intensity index. The result indicated that all of the distribution patterns of the three main species were clump in different communities, and the clump intensity index and clump area increased with the development of the community regeneration. The clump intensity index of artificial communities for 16 years was higher than others, and the clump area of natural communities was higher than others. The clump of main species, clump intensity index and the dynamics indicated that the community became better and steadier with the valid community regeneration.