Sometimes algal blooms can be observed in the oceans. Find out the reason behind the occurrence of algal blooms.
(a) Mixing of oil with ocean water
(b) Dumping of plastic objects in the ocean
(c) Increase in acidity of ocean water
(d) Mixing of nutrients present in chemical fertilisers with ocean water
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Answer:
Explanation:
increase of acidity
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(d) Mixing of nutrients present in chemical fertilisers with ocean water is the reason behind the occurence of algal blooms.
Explanation:
- Human activities such as runoff from animal farms or fertilised croplands and lawns or air deposition of sulphur and nitrogen compounds or oxides derived from fossil fuel combustion can also induce an increase in nutrients.
- In coastal seas, these nutrients cause blooms to a larger extent than in the open ocean. Some of these nutrients, however, make their way to the open ocean far from shore, where they contribute to the production of blooms.
- The wind and ocean currents assist them in their travel. Algae blooms in the open ocean are rarely detrimental, instead, they bring numerous benefits, owing to the open ocean's relative lack of productivity (low in nutrients).
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