ANALYSING BIODIVERSITY INDICES OF WOODY PLANTS IN SON TRA NATURE RESERVE CONSERVATION – DANANG CITY

Abstract

The quantitative analysis of biological diversity in order to determine the following indices: H -Shannon’s index, Importance Value Index – IVI, Cd- Simpson’s index, SI – Sorensen’s index. When the index is high, it means that the diversity is high corresponding to a high biological value. This method is very necessary to create solutions for conservation, policy and planning sustainable use of biodiversity resources.

The first application of this method is to assess biological diversity for woody vegetation in SonTra Nature Researve, Da Nang city. Survey results in 12 plots are recorded 96 species of woody plants in different habitats: natural forest, natural forest only, forests, grasslands, forests and poor natural vacant land. IVI index shows an advantage in order flora studies in which Parashorea stellata Kurz is the most dominant (IVI = 35.38) and individual variation is quite evident in the research landscape. H index is high, ranging from 1.62 to 4.76 (natural forest, natural forest only from 3.61 to 4.76, from 1.86 to 2.60 forest, grassland, 1, 62, poor natural forest and bare land fromm2.62 1.97 to 2.82. Cd index from 0.051 to 0.499 changes that the level of biological diversity of the communities have tended to decrease. SI index values of woody vegetation between the field studies ranged from 0.04 to 0.50 represents a very large difference in species composition studies
in this field. As such multi-biodiversity Son Tra Nature Reserve is quite high and is influenced by environment and development activities in the future, so should have the appropriate conservation measures