EVERYDAY SCIENCE

Detailed explanation-1: -Global warming is causing sea levels to rise, threatening coastal population centers. Many pesticides and nutrients used in agriculture end up in the coastal waters, resulting in oxygen depletion that kills marine plants and shellfish. Factories and industrial plants discharge sewage and other runoff into the oceans.

Detailed explanation-2: -The most important marine ecosystems for marine life are estuaries and coral reefs. These two marine ecosystems are important because the estuaries are breeding territories for many marine animals, because it is easy for young-lings to survive there, since there are no known predators that live in that region.

Detailed explanation-3: -Ocean acidification caused by rising levels of Carbon dioxide leads to coral bleaching where the rates of calcification is lowered affecting coral growth. Additionally, another issue caused by humans which impacts marine life is pollution and the use of plastics.

Detailed explanation-4: -Like ponds and lakes, the ocean regions are separated into separate zones: intertidal, pelagic, abyssal, and benthic. All four zones have a great diversity of species.

Detailed explanation-5: -Climate change. Climate change arguably presents the greatest threat to ocean health. Plastic pollution. Sustainable seafood. Marine protected areas. Fisheries subsidies. 08-Jun-2018