Question

In hydrosere succession, which stage comes just before the sedge meadow stage?

• A. Phytoplankton stage
• B. Submerged plant stage
• C. Reed swamp stage
• D. Woodland stage

Hint:

A common sequence to remember in hydrosere succession is:
Phytoplankton → Submerged → Floating → Reed swamp → Sedge meadow → Woodland → Climax forest.

Answer 1

The Correct Option is C

Concept: Hydrosere succession is a type of ecological succession that occurs in aquatic habitats such as ponds and lakes. Over time, the water body gradually fills with sediments and organic matter, allowing different plant communities to establish sequentially until a terrestrial ecosystem is formed. The typical sequence of stages in hydrosere succession is:
• Phytoplankton stage
• Submerged plant stage
• Floating plant stage
• Reed swamp stage
• Sedge meadow stage
• Woodland stage
• Climax forest stage Each stage modifies the habitat by depositing organic matter and reducing the water depth, allowing the next plant community to establish.

Step 1: Identify the stage immediately preceding the sedge meadow stage. From the sequence of hydrosere succession: \[ \text{Reed swamp stage} \rightarrow \text{Sedge meadow stage} \] Thus, the reed swamp stage occurs just before the sedge meadow stage.

Step 2: Explanation of the reed swamp stage. In this stage, tall amphibious plants such as reeds and cattails dominate. These plants grow in shallow water and trap sediments, further filling the pond and preparing conditions for the sedge meadow stage. Therefore, the correct answer is Reed swamp stage.