Distribution characteristic of trees and shrubs flowering plants in coastal sandy soil area in Gio Linh district, Quang Tri province

Abstract

Abstract: Study aimed to evaluate distribution characteristics of trees and shrubs flowering plant in coastal sandy soil area in Gio Linh district, Quang Tri province through frequency index, type of distribution, co-occurrence and trend of distribution of each species in each habitat. Species component was surveyed in 45 random quadrats conducted in natural plant communities. Total of 56 species was identified which distributed in 3 types of habitats: coastal mobile dunes, seasonal wetland and stable sandy soil. Random and regular type of distribution had both 8 species (14.3%), and clumped type consisted of 40 species (71.4%). Total of 56 species was divided into 4 groups of co-occurrence relation. Species predominantly distributed in stable sandy soil including 46 species, 1 species in coastal mobile dune and 7 species in seasonal wetland, 1 species largely distributed in both coastal mobile dune and seasonal wetland habitat, and 1 species mainly distributed in both stable sandy soil and seasonal wetland habitat. The study provides a scientific basis for the conservation and restoration of natural vegetation.