Multiple Choice
Which of the following situations typically leads to the start of secondary succession in an ecosystem?
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48. Ecology
Introduction to Ecology
Multiple Choice
Which of the following statements is true about the cycling of oxygen in a pond ecosystem?
A
Oxygen levels remain constant throughout the day and night.
B
Oxygen is primarily produced by aquatic plants and algae through photosynthesis.
C
Oxygen is only consumed by fish and other aquatic animals during respiration.
D
Oxygen is produced by the decomposition of organic matter.
Verified step by step guidance1
Understand the process of photosynthesis: Aquatic plants and algae use sunlight to convert carbon dioxide and water into glucose and oxygen. This process primarily occurs during daylight hours.
Consider the role of respiration: Both plants and animals in the pond ecosystem consume oxygen during respiration, which occurs continuously, day and night.
Evaluate the impact of decomposition: Decomposition of organic matter by bacteria and fungi also consumes oxygen, but it does not produce oxygen.
Analyze the daily cycle: Oxygen levels in a pond ecosystem fluctuate throughout the day due to the balance between photosynthesis during daylight and respiration and decomposition occurring continuously.
Conclude with the correct statement: Oxygen is primarily produced by aquatic plants and algae through photosynthesis, making this the true statement about the cycling of oxygen in a pond ecosystem.
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