江苏省海滩植被演替的研究

江苏省海滩植被可分为滨海盐土植被、盐沼植被及海滩沙生植被三个基本类型。本文论述了这些植被类型的演替规律。滨海盐土植被与盐沼植被的演替,外因于土壤盐分含量递减与有机质含量的递增;海滩沙生植被的演替,外因于土壤沙颗粒大小及其相应的土壤含水量的变化,所以海滩植被演替为外因动态演替。

A study on the succession of beach vegetation in Jiangsu Province

The beach in Jiangsu Province extends across warm temperate and subtropic bioclimatic belts. It may be classified into muddy beach and sandy beach by its component substance. The natural vegetation growing on the beach is called "beach vegetation", basing upon the floristic elements and ecological factors, it is divided into 3 fundamental types as follows: (1) The coastal solonchak vegetation is distributed in muddy beach; (2) The salt marsh vegetation grows on the low-ling land of muddy beach; (3) The sand beach vegetation is distributed in sand beach. In this paper, the succession on beach vegetation is analysed and described in detail. The succession on coastal solonchak vegetation is caused by the decreasing salt content and increasing humus content of soil. The succession on sand beach is caused by the changes of the size of sand grains and soil water content, therefore the succession on beach vegetation is an exodynamic succession.