What is algal bloom ? What is ots effect? In ncert class 12th
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Answer:
Algal blooms occur in response to nutrient deplete or replete conditions. Nitrogen fixing forms proliferate under oligotrophic conditions when nutrient levels are low. Replete conditions in response to upwelling creates the most biologically productive regions. Sometimes land run off and other anthropogenic influences trigger intense bloom leading to anoxia that can affect fauna at higher levels When such algal blooms are toxic (ca 6% of 5000sps) they are referred to as HABS (harmful algal blooms). With increase in the frequency of occurrence of these phenomena, setting up observational systems for monitoring and forecasting purposes would be the need of the hour.
Fertilisers used to increase the production of crops also cause algal growth in the water to which they are washed by drainage or rains. This is known as Eutrophication or Hypertrophication or Algal Bloom...
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