This book covers the levels, sources, and distribution of heavy metals in salt marsh sediment. This work is a unique work and it will help readers to understand the harmful effect of salt marsh sediment and macrophytes in the Bangladesh Coastal area. It is known that some aquatic animals have already been extinct. So their conservation is necessary. This works also reveals the potentiality of phytoremediation of spartina spp, which is easy remediation to protect our ocean environment.