影响水蕨分布的两个水化学因子相关性分析

Correlative Analysis of Two Water Chemistry Parameters Affecting the Distribution of Ceratopteris thalictroides in China

[目的]分析影响水蕨分布的两个主要水化学因子的相关性,为水蕨生境保护和种群恢复提供依据。[方法]对分布在我国热带和亚热带部分地区22个样点的22个水化学参数的平均值,计算其变异系数,对具显著性差异的两个化学因子采用最小显著差法和相关系数法分别进行多重比较分析和相关性分析。[结果]所测22个化学因子变异系数都有较大变化,但只有pH值和电导率在两种水体(type A和type B)中有显著性差异,相关分析显示二者呈正相关,但多重比较分析表明水质pH值的显著性差异高于电导率。[结论]具显著性差异的两个化学因子中,水质pH值对水蕨的分布影响更大。

[ Objective ] The relationship of two water chemiscal parameters affecting the Ceratopteris thalictroides was analyzed to provide the basis of its protection and population restoration. [ Method ] The coefficient of variation of the average values of 22 water chemiscal parameters from 22 sampling places distributed in China＇s tropical and subtropical region was calculated and the multiple comparative analysis and correlation analysis between two chemical factors with significant difference were done with the method of least significant difference and the correlation coefficient, respectively. [ Results ] There was large variation in change coefficient of 22 chemical factors measured, but only the difference of pH value and electrical conductivity in two water bodies（ type A and type B ） was significant, which was a positive correlation. And the multiple comparison analysis showed that the significant difference of pH value between water bodies was higher than that of electrical conductivity. [ Conclusion ] In the two chemical factors with significant difference, the impact of pH value in water body on the distribution of Ceratopteris thalictroides was greater.