Question

Difference between marine eutrophication and freshwater eutrophication

Answer 1

Answer:

Eutrophication is the process by which a body of water becomes enriched in dissolved nutrients that stimulate the growth of aquatic plant life but result in the depletion of dissolved oxygen in the water (anoxia).

Freshwater eutrophication refers to the excessive growth of aquatic plants or algal blooms, due to high levels of nutrients in freshwater ecosystems such as lakes, reservoirs and rivers. The excess nutrients come agricultural runoff, overuse of fertilizers, or leaks from septic tanks. Excess phosphorus often causes eutrophication in freshwater

Marine eutrophication results in large blooms of algae and aquatic plants due to excess presence of nitrogen in saltwater. The increased growth of algae changes in the balance of organisms, and degradation of water quality. After the aquatic plants decay, it increased oxygen consumption in bottom waters and reduced oxygen concentrations. The effects on bottom is lethal on the fauna. Within a short period hypoxia will kill most invertebrates living in and around a place with marine eutrophication.

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