The use of diversity indices for local assessment of marine sediment quality

Abstract Diversity indices are commonly used to measure changes in marine benthic communities. However, the reliability (and therefore suitability) of these for detecting environmental change is often unclear because small sample size and inappropriate choice communities analysis. This study explored uncertainties taxonomic density two community structure our target region, Japan, local areas within this potential solutions. Our analysis Japanese regional dataset showed a decrease family dominance few species as sediment conditions become degraded. Local case studies that affected by degradation at sites where multiple coexist. could insensitive masking variability, sometimes caused misleading or inaccurate estimates indices. We conclude sensitive indicator communities, emphasise should only be when distinguishable from other coexisting there sufficient size.