What is the key concept for this section? How much do we know about the habitats and species that make up the earth’s aquatic biodiversity? What are three general patterns of marine biodiversity? Give...

What is the key concept for this section? How much do we know about the habitats and species that make up the earth’s aquatic biodiversity? What are three general patterns of marine biodiversity? Give six reasons for caring about marine biodiversity. What are the six major threats to aquatic diversity and ecosystems as summarized by the acronym HIPPCO? How have coral reefs been threatened? What is coral bleaching and what causes it? How can sunscreen lotion harm coral reefs? What is the state of the world’s mangrove forests, sea-grass beds, and oceanbottom habitats? What is ocean acidification? What causes it, what are its projected harmful effects on ocean life, and how could we reduce these threats?