Subjects: Biology >> Botany >> Applied botany submitted time 2022-05-21 Cooperative journals: 《广西植物》
Abstract： The terrain of Hainan is high in the middle and surrounded by low terrain on all sides. From the central mountains to the eastern coastal plains, due to the difference of natural conditions and historical human interference, the composition of flora has changed. In this study, quadrant sampling and line transect survey was carried out in Huishan Nature Reserve (in the middle and north of Hainan Island) to discover its composition. Then combined with the data of Wuzhishan Nature Reserve in the middle of Hainan Island (now part of the Tropical Rainforest National Park), Baishiling Nature Reserve in the eastern noncoastal area and Tongguling Nature Reserve in the northeastern coast, which investigated by our the team, compared and analyzed their flora composition characteristics. Try to explore the relationship between the change of flora composition and the secondary, area and altitude of Nature Reserve. The results were as follows: (1) There were 1 893 species, 1415 species, 634 species, and 913 wild seed plants in Wuzhishan, Huishan, Baishiling, and Tongguling Nature Reserves, the number of species in the central protected areas was significantly higher than that in the other 2 protected areas. (2)Species similarities between protected areas were significantly correlated with differences in altitude and area (P<0.05). (3) Four protected areas were dominated by tropical elements, but at the level of genera, Wuzhishan was dominated by tropical Asia, while others were dominated pan-tropical distribution; At the level of species, distribution of tropical Asia were the most in four reserves. In conclusion, from the central mountains to the eastern coastal plains, the more secondary, the lower the altitude, the less habitat types, and the number of plant species is poorer; At the same time, at the level of genera and species, the tropical composition were increased, while temperate, endemic and relict elements were decreased.
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