Organic enrichment leads to increased levels of which substances in lakes and streams?

Organic enrichment refers to the increased presence of organic materials, often from sources such as agricultural runoff, wastewater discharge, or decaying plant and animal matter, in lakes and streams. This process can lead to the proliferation of microorganisms, particularly bacteria, that decompose the organic matter. As these microorganisms thrive, they engage in metabolic processes that can increase the levels of pollutants in the water.

When organic matter decomposes, it can release various substances, including nutrients like nitrogen and phosphorus. While these nutrients can lead to eutrophication—an over-enrichment that causes excessive plant growth and oxygen depletion—they also contribute to the overall pollutant load in the aquatic ecosystem. Thus, as organic enrichment occurs, the concentration of pollutants in the water often increases, affecting aquatic life and water quality.

Understanding this relationship highlights the importance of managing organic materials entering water bodies to prevent ecological degradation and maintain healthy aquatic environments.