Which of the following statements about eutrophication is/are correct? 1. Eutrophication takes place in young lakes when the water is cold and clear. 2. Eutrophication is caused by nutrient enrichment in water bodies. Select the answer using the code given below.
2 only
Statement 1: Cold, clear water with low nutrient content describes an oligotrophic (young, nutrient-poor) lake, which is the opposite of eutrophication. Eutrophication is instead associated with nutrient-rich, often warmer and algae-choked water bodies. This statement is incorrect.
Statement 2: Eutrophication is the process by which a water body becomes excessively enriched with nutrients, especially nitrogen and phosphorus (often from agricultural runoff and sewage), leading to excessive algal and plant growth and subsequent oxygen depletion. This statement is correct.
Hence, the answer is 2 only.
Important Questions from Ecology & Environment
One horned Rhinoceros is a conserved species at:
Who amongst the following forms the first trophic level in an ecosystem?
- Which of the following is a non-biodegradable item?
Primary consumers are
Jared Diamond, in his seminal works on ecological history and biodiversity, identified 'the evil quartet' as the four primary anthropogenic causes of biodiversity loss. Which of the following, despite being a major contemporary driver of species extinction and ecosystem disruption, is generally *not* classified as one of the original four components of Diamond's 'evil quartet'?
