Among the three ecosystems, riverine mangrove (station I)
ecosystem is more pristine in nature than the developing and island
mangrove ecosystems. Benthic macrofauna species assemblage is
comparatively higher in station I than in stations II and III. Analysis of
data undertaken with predictable like line Shannon diversity, Simpson
richness, and recently introduced diversity indices such as taxonomic
diversity index and total phylogenetic index clearly opined that healthy
nature of the mangrove ecosystem. From the present study, it could be
concluded that the hydrography, nutrients, and sediment texture are
the major factors responsible for fluctuation in benthic macrofaunal
assemblages in the study area.