The composition and heterogeneity of the rich and diverse rotifers (Rotifera: Eurotatoria) of the floodplain lakes (beels) of the Majuli River Island, Assam State (Northeast India)

The tropical and subtropical floodplain lakes are hypothesized as one of the globally interesting rotifer rich ecosystems. Our study indicating biodiverse Rotifera ten ‘slightly acidic to circum-neutral, moderately hard-water de-mineralized’ (beels) Majuli River Island Brahmaputra river basin northeast India mendorses this hypothesis. Total richness, richness important families community similarities affirm heterogeneity mof species composition amongst beels. registers significant spatio-temporal variations with seasonal differences beels individually in each beel, lacks influence recorded abiotic factors. constellations 76-81 three during winter 76 beel pre-monsoon noteworthy instances ‘Rotifera paradox’. fauna affinity Southeast Asian Oriental faunas, records several regional distribution interest exhibits littoral-periphytic nature, while application Q B/T L/B quotients depicts limitations. This merits ecological diversity for vis-avis elsewhere from tropics subtropics, assumes biodiversity conservation importance due threat extinction – an alluvial basin.