Treatment of shrimp farm effluents using a combination of native plant species in the Mekong Delta region

Biodiversity status of the Mekong Delta, Vietnam

“…Soils in the Mekong Delta derive from sediment transported by the Mekong River. Three main soil classes are recognized (Le 1994): old alluvial sediments in parts of the northern delta; non-acidic alluvial soils in much of the central area, where land is most suited to rice growing; and acid-sulphate soils, found mainly in the north-west and north-east (Buckton et al 1999). Following Ngo (2009), due to the uniformity of such soil formation factors as topography, geology, climate and water regime, soils in the Mekong Delta are distributed across large areas with relatively uniform topographic morphology.…”

“…Seasonally inundated grassland has almost disappeared from the delta and now only exists in small areas in the protected areas. Le (1994) and Tran (1999) Other types of floating vegetation can be found in the canals in areas of Melaleuca forests that support a diverse community of floating, aquatic and subaquatic species, including Eichhornia crassipes, Pistia stratiotes, Salvinia cucullata, Ipomoea aquatica, Ludwidgia adscendens, Centrostachys aquatica, Azolla pinnata, Spirodela polyrrhiza and Lemna aequinoxialis (Buckton et al 1999).…”