喀斯特不同岩石产状生境类型下白栎群落的物种多样性研究

摘要

Natural secondaryQuercus fabric community with three typical types (i.e. the dolomites of low oblique occurrence with multilayer space, middle oblique occurrence with multilayer space and high oblique occurrence with multilayer space) were sampled in the Karst area. The objectives were to obtain the plant community data and to identify the plant species composition, α diversity and β diversity. The results showed that: 1) the different carbonate rock occurrence habitat plots which have the same dominant plantQuercus fabric species were different from the species quantity and the plant species composition; 2) the plant species diversity in the low oblique occurrence habitat was the highest, followed by the high oblique occurrence habitat with the middle oblique occurrence habitat being the smallest; 3) the plant growth types in the different habitat sample plots, species richness, diversity, and evenness showed the same regularities (herb > shrub > arbor) except the middle oblique occurrence habitat sample plot, the ecological dominance was the highest in the tree layer. This study provided a basis and reference for the plant ecological space, tree selection, and ecological restoration.%本文选取喀斯特区不同岩石产状生境类型——白云岩低倾产状多层空间类型、中倾产状多层空间类型及高倾产状多层空间类型的天然次生性白栎群落为研究对象，采用野外样地调查方法获取植物群落数据，并对各生境类型植物群落种类组成、α多样性、β多样性进行了研究。结果表明：1)以白栎为优势树种的不同产状生境类型的样地，其物种数量及组成存在差异；2)低倾产状样地物种多样性最高；高倾产状样地次之，中倾产状样地最小；3)在不同生境类型的各种植物生长型中，除中倾产状样地外，其他类型的物种丰富度、多样性和均匀度均表现为灌木>草本>乔木，生态优势度均以乔木最高。通过此研究，旨在对喀斯特区植物生长空间的研究、植被选择、生态恢复提供参考。