Ocean Nutrients and Their Impact on Marine Life

How do autotrophs primarily obtain their nutrients?

• By absorbing nutrients from the surrounding water

• Through the food they eat

• By consuming other organisms

• Through photosynthesis alone

What is a significant source of nitrogen for autotrophs in the ocean?

• Consumption of other marine organisms

• Nitrogen fixation by bacteria

• Photosynthesis

• Direct absorption of nitrogen gas

Which process is NOT a source of nutrients to the ocean?

• Decomposition

• Rock weathering

• Fertilizer runoff

• Sediment deposition

Where would you expect to find high nutrient concentrations in the ocean?

• In the clear waters of tropical islands

• In the middle of the ocean

• In the deep photic zone

• Near rivers and populated coastlines

What is a characteristic of marine deserts?

• High nutrient levels

• Frequent upwelling

• Abundant marine life

• Clear waters and deep photic zones