What is the Simpson dominance index for 0.81?

The Simpson dominance index, often represented as (D), quantifies the likelihood that two individuals randomly selected from a community belong to the same species. An index value of 0.81 indicates a high level of dominance, suggesting that a single species is prevalent in the community. This means that there's a strong chance that if you pick two individuals, they will likely be of the same species. In ecological terms, a value close to 1 implies low diversity, while values closer to 0 indicate higher diversity.