Relationship between Plant Species Diversity and Habitat in A Tropical Moist Forest
Two sample plots of 8 400 m2 were established in Bawanglin National Nature Reserve, Hainan province for investigating species composition of plant communities and habitat factors of the tropical mist forest. The results showed that there are total of 9323 vascular plants, belonging to 109 species of 40 families and 70 genera. The dominant families are Hamamelidaceae, Myrtaceae, Symplocaceae and Fagaceae, and the dominant species areDistylium racemosum,Syzygium buxifolium,Psychotria rubraandEngelhardtia roxburghiana. Relationship of species richness with area and species richness with abundance were logarithmic curves, with the minimum sampling area of 1000 m2 and the minimum abundance of 1000. Species richness, abundance, Simpson index and Shannon-wiener index changed with minimum measure diameter, like inverted J-shaped curves. The maximum measured diameter was 3 cm, the surveyed community had 95% species richness. Community abundance, species richness and bootstrap index had close relationship with soil available nitrogen and phosphorus content.