Chapter1. Ecosystem services provided by various coastal ecosystems.- Chapter2. Sediment biogeochemistry in the coastal ecosystem.- Chapter3. Biogeochemical processes of natural organic matter in coastal ecosystems.- Chapter4. Role of the coastal ecosystem as a natural buffer and carbon sink.- Chapter5. Biogeochemical response of coastal systems to natural calamities.- Chapter6. Impact of agricultural activities on the coastal ecosystem: Nutrient contamination and Eutrophication.- Chapter7. Heavy metal contamination in coastal ecosystems.- Chapter8. Microplastic and emerging contaminants in coastal ecosystems.- Chapter9. Impact of urbanization and industrialization on the coastal ecosystem.- Chapter10. Effect of climate change on the coastal ecosystem.- Chapter11. Biodiversity in coastal habitats.- Chapter12. Coastal Ecosystems and human well being.- Chapter13. Application of various technologies and strategies for the conservation of coastal ecosystem.- Chapter14. Government policies and Society involvement for the management of aquatic ecosystem.- Chapter15. Coastal Ecosystems of India, their Conservation and Management Policies: A Review.