Assertion: Oceans are a low producitivy ecosystems despite occupying about 70% of the earth,s surface.
Reason: In aquatic ecosystems, productivity water depth.

Assertion: Oceans are a low productivity ecosystems despite occupying about 70% of the earth surface. Reason: In aquatic ecosystems, productivity is limited by light which decreases with increasing water depth.

Assertion: Oceans are a low productivity ecosystems despite occupying about 70% of the earth surface. Reason: In aquatic ecosystems, productivity is limited by light which decreases with increasing water depth.

Assertion: Oceans are a low productivity ecosystems despite occupying about 70% of the earth surface. Reason: In aquatic ecosystems, productivity is limited by light which decreases with increasing water depth.

Why is there a shortage of water even though it occupies about 71% of the earth's surface ?

51% of the earth’s surface is covered with water.

Assertion : Ozone layer is present in the stratosphere. Reason : Hydrosphere covers about 70% of the earth's surface.

Assertion: In Terrestrial, ecosystem much larger fraction of energy flows through the detritus food chain Reason: In an aquatic ecosystem. GFC is the major condult for energy flow.

Assertion: In Terrestrial, ecosystem much larger fraction of energy flows through the detritus food chain Reason: In an aquatic ecosystem. GFC is the major conduit for energy flow.

About 71% of earth's surface is covered with water,then why do we face scarcity of water?