生物具有对环境的适应能力,其群聚结构的迁移速度一般要比环境的理化因子变化缓和。故其群聚组成、特定种类分布以及生物量变化等,能很好地体现出所在水域的环境条件特征,特别是底栖生物。根据特定指标对环境进行分析的方法不少,在此主要对相似度和多样度两方面进行探讨。一、群聚相似度若已了解各样本之中的数量关系和种间关系,明确其所出现种类构成的相似度,便可以用以划分 Organisms have the ability to adapt to the environment, and the migration speed of the cluster structure is generally slower than that of the physical and chemical factors of the environment. Therefore, the composition of the cluster, the distribution of specific species and biomass changes, which can well reflect the characteristics of the environmental conditions of the water area, especially benthic organisms. There are quite a few ways to analyze the environment according to specific indicators, and we mainly discuss the two aspects of similarity and diversity. First, the clustering similarity If you have to understand the relationship between the number of species and interspecies relationships, clear the similarity of the types of composition they appear, you can use to divide