When a water body is deficient in nutrients, it is known as

Concept

Trophic state classifies water bodies by nutrient availability, biological productivity, and the resulting water-quality characteristics.

A lower nutrient supply limits algal production, while increasing enrichment generally raises algal biomass and may reduce oxygen in deeper water.

Application

The stem describes deficient nutrients, which is the low-nutrient trophic condition. This condition is termed oligotrophic.

Contrast

• Oligotrophic: low nutrient supply and low biological productivity, commonly with clear water.

• Eutrophic: nutrient enrichment and high biological productivity, often with abundant algal growth.

• Mesotrophic: an intermediate trophic state between low and high productivity.

• Dystrophic: brown, often acidic water dominated by dissolved humic material rather than trophic enrichment alone.

Result

Therefore, the water body is oligotrophic.