上海市环城绿带建成初期林下自然草本植物多样性格局及其成因

以上海市环城绿带林下自然草本植物为研究对象,采用群落学的调查方法,调查草本植物群落277个.结果如下:共记录自然草本植物33科73属88种；划分了49个群落类型,以一年生草本植物为优势种的群落较多.说明在环城绿带的建成初期,光照条件较好,林下自然草本植物多样性高,群落类型丰富；同时作为人工林受到的人为干扰较大,更利于高适应性的一年生草本植物生长.

Study on the diversity pattern of natural herb under the forest of Shanghai Green Belt during its early building-up period

An investigation of the natural herb under forest of Shanghai Green Belt was made, where 277 community plots were surveyed. The results show that the flora of the natural herb recorded in the study area includes 88 species, 73 genera and 33 families, which were divided into 49 community types, with the annual plant as their dominant species. This suggested that there was a high diversity of community types under the forest of Shanghai Green Belt during its early building-up period owing to the condition of good sunlight. Moreover, it was better for the highly adaptable annual plants to grow there because of the high frequency of human disturbances.