关键词: 霸王岭分局, 橡胶林, 物种多样性, 演替

Abstract:

To understand the characteristics of understory plant diversity in the rubber forest of Hainan Bawangling,the rubber forest sample with a total area of 10 400m² was selected from the Bawangling Branch of Hainan Tropical Rainforest National Park Administration for investigation,and the species richness index(S),Shannon-Wiener index(H')and Simpson index(P)were used to analyze the characteristics of understory plant diversity in the rubber forest of Bawangling Branch under different environmental conditions.The results showed:1)In this survey,a total of 478 species of 309 genera in 110 families were recorded,of which more than 100 species had not been recorded in the previous understory plants of the rubber forest in Hainan,such as Lithocarpuscorneus,Quercus fleuryi,and Syzygiumchampionii andother species in forest successions of mid- or late-stage;2)The plant diversity of the rubber forest under the Bawangling Branch was jointly affected by different environmental conditions,and the diversity index of each species was the highest under the conditions of altitude of 400-600m,the slope of 21-30 degree and depression closure >0.8,and there was no obvious rule on the slope.3)The influence of different management methods on plant diversity under the rubber forest was significantly different,and the changing trend of the species diversity index was consistent,that was,normal operation and management<neglect management<abandon operation management;4)The composition of plants under the rubber forest that transferred from normal management to abandon management had gradually transitioned from the middle and early plants to the middle and late plant species,and there was a natural succession tendency towards the local tropical rainforest.

Key words: Bawangling Branch, rubber forest, species diversity, succession