EVERYDAY SCIENCE

Detailed explanation-1: -The aquatic biomes that are the least productive are the open ocean, the hadopelagic zone of the ocean, and the Dead Sea. In the open ocean, there is plenty of sunlight but not enough nutrients to support most living organisms that are not just passing through.

Detailed explanation-2: -Biological productivity is low in the open ocean because the open ocean has low nutrient levels.

Detailed explanation-3: -The least productive ecosystems are deserts and deep lakes.

Detailed explanation-4: -The open ocean is among the least productive ecosystems, yet it contributes greatly to the overall productivity of the biosphere. How do you explain this paradox? The open ocean is the least productive but has the most overall productivity because it is so vast and deep that it compensates for itself.

Detailed explanation-5: -An estuary is a coastal zone where oceans meet rivers. Here, nutrients and salts from the ocean mix with those from the river in regions sheltered from extreme weather. As a result, estuaries are among the most productive places on Earth and support many types of life.