Environmental Science 15th Edition by Scott Spoolman,Tyler Miller

تمرين 14

What major ecosystem and economic services are provided by marine systems? What are the three major life zones in an ocean? Define and distinguish between the coastal zone and the open sea. Distinguish between an estuary and a coastal wetland. Explain the ecological and economic importance of coastal marshes, mangrove forests, and sea-grass beds. What is ocean acidification and why is it a threat to coral reefs? Describe the three major zones in the open sea. List five human activities that pose major threats to marine systems and eight human activities that threaten coral reefs.