Ecological status of aquatic vascular macrophytes of Nalbari Assam, north-east India

The present investigation was carried out to study the status of aquatic vascular macrophytes in wetlands of Nalbari district,Assam. A total of 76 aquatic vascular macrophytes were recorded in different wetlands of Nalbari district, belonging to 57 genera and 36 families. The highest number of species was recorded in Poaceae, followed by Cyperaceae, Asteraceae and Onagraceae. The species of the family Poaceae (Grass) and Cyperaceae (Sedge) has the major contribution to the aquatic vegetation of different wetlands in the entire district. During the study species richness was high for monocotyledonous species followed by dicotyledonous and Pteridophytes. Eichhornia crassipes was the most dominant aquatic vascular macrophytes of entire study area followed by Isachne himalaica Colocasia esculenta and Monochoria hastata. Moreover, the marginal and anchored floating species were the dominant species of entire study area.