Dead zones are areas in the ocean or large lakes where oxygen levels are critically low (hypoxia), making it difficult for most marine life to survive. This condition is primarily caused by eutrophication, a process triggered by excess nutrients like nitrates and phosphates entering the water body.
Dead zones in the world's oceans and large lakes are characterized by :
Asked in HPPSC HPAS Prelims 2016 · Topic: Pollution (Eutrophication: Process, causes, consequences, control measures.)
More Environment and Ecology questions
- Which of the following statements about Eutrophication is/are correct? (a) The eutrophication occurs in lotic water body primarily in hilly region. (b) The eutrophication occurs in lentic water and there is gradual accumulation of organisms and their products. (c) The eutrophication promotes fish growth as algal blooms serve as source of food to fishes. (d) The eutrophicated water is oxygen rich and safe for human consumption without treatment.
- Identify the incorrect statement:
- Eutrophication of water body results from
- Eutrophication leads to the death of fish due to ______
- The abundant growth of algae in water reservoirs is due to
- Consider the following statements :
- With reference to Eutrophication, which of the following statement(s) is/are correct?
- Which of the following are the major contaminants from industries and households that cause cultural eutrophication?