Investigate and Flora Analysis of Vascular Plants in Reservoir Water-level-fluctuating Zones in the Main Urban Area of Haikou
Haikou is the core city of Hainan Free Trade Port and an international wetland city,and the reservoir serves as an essential wetland space within the scope of the main urban area;however,a survey of vascular plants in the water-level-fluctuating zone and a flora analysis of these plants have yet to be carried out.For this reason,this study used the meth-ods of sample lines and quadrats from October 2022 to August 2023 to select seven reservoirs within the main urban area of Haikou to carry out field surveys,with a total of 271 sample squares,and analyze their vascular plant diversity and zonation characteristics.The results revealed that:(1)A total of 372 species of vascular plants were recorded,belonging to 88 families and 273 genera;among them,eight species belonged to fern(seven families,seven genera),and 364 species belonged to an-giosperms(81 families,266 genera);the community structure was dominated by herbs and shrubs,accounting for 87.90％of the number of species,with fewer trees.There were 77 species of invasive plants,accounting for 20.70％of the total number of plants.At the level of families and genera,families containing one to nine species accounted for 90.91％of the total number of families,and genera with a single species account for 84.25％of the total number of genera.(2)In the comparison of simi-larity coefficients between sample plots,Jinniuling Reservoir was obviously different.(3)The tropical components and char-acteristics of the flora were distinct,accounting for 60.22％and 85.72％of the tropical distribution families and genera,re-spectively,which is typical of the ancient tropical flora and indicates that the main urban area of Haikou has of a tropical fringe nature.The results of this study can provide helpful references for the future conservation of plant diversity in reservoir wetlands or similar wetlands in the main urban area of Haikou,as well as for the scientific development of water conservancy construction and rational utilization.
万方数据
维普
