江苏海岸沙生植被的研究

 海岸沙生植被系由沙生植物和一些耐沙植物所组成的隐域植被，具旱生性质；种类组成简单，只24种，隶属18科，21属。此外，在砂质海岸听见的一个向森林演替的群落地段，含有19种木本，21种草本植物，概为新发观的耐沙植物，根据组成植物的生活型分析，作了沙生植被的生活型谱。 海岸沙生植被可分为草本与木本两个基本类型、共6个群落。它们的演替规律作了论述。最后讨论了沙生植被的开发、利用及保护问题。

A STUDY OF THE PSAMMOPHILOUS VEGETATION ALONG THE COAST OF JIANGSU PROVINCE

Psammophilous vegetation, found on the sandy coast of the littoral zone, is composed of psammophytes and some plants with sandy tolerance. It is a intrazonal vegetation with xeromorphic properties. The floristic composition of psammophilous vegetation is poor. According to data from many parts of the coast, there are about 24 species of vascular plant belonging to 18 families and 21 genera. Besides, there is a successional stage of forest in the psammo-littora, which contains 19 woody species and 21 herbaceous species all with sand resistance. They are newly discovered. In survey, we identified 2 fundamental types and 6 communities which are as follows: 1. Herbaceous sand vegetation. This type of vegetation may be divided into 5 communities. 1) Messerschmidia sibirica community; 2) Salsola pestifer eommunity; 3) Carex kobomugi+Glehnia tittoralis community; 4) Carex pumila+Calystegia soldanella+Ixeris repens community; and 5) Imperata cylindrica var. major community. The latter may be succeed by shrub community. 2. Woody sand vegetation. There is only one community which is Vitex trifolia var. simplicifolia community. Besides, there are two cultivated forests namely Robinia pseudoacacia forest and Amorpha fruticosa shrub forest. All the communities mentioned above have been described or tabulated in the distribution, succession, etc., respectively. The problems on the exploitation, utilization and protection of psammophilous vegetation are discussed.