Research on the Structures and Dynamic Diversity of Artificial Coniferous Forest Communities in Shanghai
Community structures and dynamic diversity of artificial coniferous forest in Shanghai were analyzed based on quadrat survey.The results demonstrated that the plant composition of the artificial coniferous forest community was relatively rich with 75 species of vascular plants in 64 genera and 43 families,and herbaceous plants were the main components of community diversity.The artificial coniferous forest could be divided into Metasequoia glyptostroboides forest and Taxodium ascendens forest,both of which were pure forests.In terms of the vertical structures of the community,the tree species in the arbor layer were relatively simple with stands in high density,most of which were at young-middle ages.The shrub layer was dominated by the regeneration seed-lings of broad-leaved tree species with a lack of regeneration seedlings of coniferous species.The herbaceous lay-er had the most abundant plant species,dominated by Gramineae and Rubiaceae family.Diversity indices calculat-ed from continuous observation in 2011,2016 and 2021 showed that the richness of the arbor layer was relatively stable with little fluctuation.The richness of shrub layer increased with higher diversity index year by year,while the herbaceous layer behaved a reversed changing in contrast.For overcrowded artificial coniferous stands in the middle and young stages,proper forest management should be strengthened to protect the growth and develop-ment of the understory,promote the transition from coniferous forest to mixed conifer-broadleaf forest.
artificial coniferous forestcommunity structuresdynamic diversityShanghai City
万方数据
维普
