Which of the following statements is are correct regarding 39 Eutrophication 39 of lakes 1 It i...........

Environment and Ecology Natural ecosystems and protection

Which of the following statements is/are correct regarding 'Eutrophication' of lakes?

1. It is when a body of water becomes overly Polluted with Agricultural wastes and sewage.

2. It leads to depletion of oxygen content in the water body.

3. It is often induced by the discharge of nitrate or phosphate-containing detergents, fertilizers, or sewage into an aquatic system.

Select the correct answer using the code given below.

1 and 2 only

2 and 3 only

1 and 3 only

1, 2 and 3

छोटे Courses बड़े Results

Master Natural ecosystems and protection

Prepare through Micro-courses

Try Now

Explanation:

An overabundance of nutrients—primarily nitrogen and phosphorus—in water starts a process called eutrophication. Algae feed on the nutrients, growing, spreading, and turning the water green. Algae blooms can smell bad, block sunlight, and even release toxins in some cases.

Eutrophication is when a body of water becomes overly enriched with minerals and nutrients which induce excessive growth of algae. This process may result in oxygen depletion of the water body. One example is an "algal bloom" or great increase of phytoplankton in a water body as a response to increased levels of nutrients. Eutrophication poses a problem not only to ecosystems, but to humans as well. Finnish phosphorus removal measures started in the mid-1970s and have targeted rivers and lakes polluted by industrial and municipal discharges. These efforts have had a 90% removal efficiency.