Abstract:Based on the 2×2 contingency table, a series of parameters, including X2-test, Ochiai values (OI) and correlation index were used to analyze the characteristics of interspecific associations among 17 dominant populations in the communities with Alseodaphne hainanensis in Bawangling, Hainan Island. The results showed that the interspecific associations among 17 dominant populations were not significantly positive correlation. The 136 species pairs at all were consisted of 17 dominant populations. When the sampling area was 100 m2, 72 species pairs had positive correlation, 63 species pairs negative correlation, and 1 species pairs no correlation. The X2-test indicated that 2 species pairs had significantly positive correlation and 3 species pairs had significantly or very significantly negative correlation. The Ochiai value (OI) of 125 species pairs ranged from 0 to 0.6, 9 species pairs were greater than or equal to 0.6, and 2 species pairs were 0. When the sampling area was 50 m2, 59 species pairs had positive correlation, 70 species pairs negative correlation, and 7 species pairs no correlation. The X2-test indicated that 6 species pairs had significantly positive correlation, and 2 species pairs had significantly negative correlation. The OI of 129 species pairs ranged frome 0 to 0.6, and the others 7 species pairs were 0. There were differences in interspecific association among communities with different dominant populations, but the interspecific associations in community with Syzygium araiocladum as dominant population were stronger than those in other communities, it reflected that the community was stable.
