root network in mangrove tress in the undergrowth exposed in the eroded soil of bangladesh sundarbans

root network system undergrowth mangrove tree soil erosion erosions eroded salt saline tolerant salty water pneumatophores bangladesh sundarbans ecosystem inside swamp forest sundari gewa goran nature natural freshwater botany sea level rise global warming high low tide background environment outdoor landscape green plant wood brown leaf pattern beauty trees closeup tress exposed muddy