Explaining the high diversity of tropical rain forest has been a challenge for ecologists for decades. We applied a recent technique of spatial statistics that is Individual species area relationship (ISAR) to study diversity structure of a tropical broadleaved forest based on individual species. The ISAR is combined by species area relationship and Ripley’s K to measure the expected diversity of individual specific species in circular neighborhoods with variable radius of moving window circles around an arbitrary individual of a focal species. Data was collected from two fully mapped 2-ha plots of tropical broadleaved forest in Quang Binh province, Vietnam. | Individual species area relationship of tropical tree species after selective logging regimes in Truong Son forest enterprise, Quang Binh province
