When nitrates get into a lake, they trigger a fast increase in algae growing across the water surface. As a result, the following changes happen in the lake: 1 The amount of dissolved oxygen in the water falls. 2 Fish and other aquatic animals die. 3 Aerobic respiration in decomposers rises. 4 Producers die and decomposition rises. What is the correct sequence for these changes?
- A1 2 4 3
- B3 1 2 4
- C4 2 3 1
- D4 3 1 2