上海大金山岛的自然植物群落多样性

<正>大金山岛位于上海西南角的杭州湾中(E121°24′-25′,N30°41′-42′),面积0.3km2,最高点的海拔高度为105.03m,是上海市地面最高点。该岛地处中亚热带北缘,受东亚季风以及太平洋暖湿气团的影响,四周被水域包围,属海洋性气候,温和湿润,四季分明。年平均温度16℃,最冷月(1月)平均温度为3.3℃,年平均降雨量大于1000mm。Kira的温暖指数(WI)为130.2℃·月,寒冷指数(CI)为-2.1℃·月。土壤为地带性的褐色山地黄壤,厚约1m,pH值4.5~4.7。

The diversity of plant community on Dajinshan Island, Shanghai

Dajinshan Island, locates in Hangzhou Bay at the side of Shanghai with an only 0.3 km2 area, is the best-preserved natural area in the metropolis. Under the warmth and humid weather conditions, the secondary vegetation has continued to develop without intense disturbance of human impact, especially after 1978 when a station troop left. Twenties later, a detailed study on the vegetation was carried out. By the physiognomy of communities, the vegetation on Dajinshan Island was classified into five types such as meadow or grassland and shrub, shrubbery, deciduous broad-leaved forest and evergreen broad-leaved forest. And sixteen community types were categorized, named according to the dominant species. The main characteristics of the shrubbery and forest communities were introduced, the significance and process of the vegetation protection on the island were put forward, and the application of the natural vegetation on the construction of the urban forest was discussed in this paper.