Sample interview questions: Can you explain the concept of algal blooms and their causes in relation to water quality?
Sample answer:
Algal Blooms: A Detailed Explanation
Algal blooms are rapid increases in the population of algae in water bodies. They can be caused by natural factors or human activities.
Causes of Algal Blooms:
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Nutrient Pollution: Excessive amounts of nutrients such as nitrogen and phosphorus enter water bodies from fertilizers, sewage, and animal waste. These nutrients stimulate algal growth.
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Increased Water Temperature: Higher temperatures provide favorable conditions for algal growth. Climate change is causing water temperatures to rise, leading to more frequent and severe algal blooms.
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Still Water: Calm water conditions allow algae to thrive, as they have less competition for sunlight and nutrients.
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Lack of Predators: Overfishing can reduce the population of herbivorous fish that feed on algae, reducing their natural control.
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Human Activities: Activities like boating and fishing can stir up sediments, releasing nutrients that promote algal growth.
Effects of Algal Blooms on Water Quality:
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Reduced Oxygen Levels: Dense algal blooms can block sunlight from reaching underwater plants, affecting photosynthesis. This reduces oxygen production and can lead to fish kills.
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Toxins: Some algal species produce toxins that can harm aquatic life and humans through recreational activities or drinking contaminated water. Shellfish can accumulate algal toxins, posing a health risk to consumers.
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Clogging: Algal blooms can clog water filters and reduce the effectiveness of water treatment plants.
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Economic Losses: Algal bl… Read full answer
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