Role of edaphic factors on the growth of dominant mangrove species in Indian Sundarbans
Mahua Roy Chowdhury, Tarun Kumar De, Santosh Kumar Sarkar
We evaluated the above-ground biomass (AGB) of five even aged dominant mangrove species (Avicennia officinalis, Avicennia marina, Avicennia alba, Sonneratia apetala and Excoecaria agallocha) in the western and central sectors of Indian Sundarbans during 2012 to 2014. Among the studied species, Avicennia officinalis showed maximum above-ground biomass followed by A. alba, A. marina, S. apetala and E. agallocha. The Biomass of above-ground structures (stem, branch and leaf) of the species vary significantly with spatial location (p<0.05), the values being more in western sector on account of higher stem biomass. Salinity and availability of nutrients posed significant impact on the biomass and growth of studied mangrove species. The Avicennia spp. has extreme salt tolerance capacity with unique morphological characteristics such as salt secreting salt glands in leaves as well as efficient salt filtration capacity at the roots, reflecting considerable resilience of the species to sea level rise.