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

Step 1: Understanding the Question:
The question requires identifying the specific ecological stage that precedes the "sedge meadow stage" in the process of primary succession in a water body (hydrosere).
Step 2: Key Formula or Approach:
The standard sequence of stages in a hydrosere must be recalled to determine the chronological order of plant communities.
Step 3: Detailed Explanation:
Ecological succession in an aquatic environment follows a predictable pattern as the water body becomes shallower:
1. Phytoplankton Stage: Microscopic algae and bacteria.

2. Submerged Plant Stage: Rooted plants like Vallisneria.

3. Submerged Free-floating Stage: Plants like Pistia or Lemna.

4. Reed Swamp Stage: Amphibious plants like Typha that grow in shallow water.

5. Sedge Meadow Stage: Marshy vegetation like Carex where the soil is damp but not submerged.

6. Woodland Stage: Shrubs and small trees.

7. Climax Forest Stage: Mature trees.
Step 4: Final Answer:
Looking at the sequence, the stage immediately before the sedge meadow stage is the Reed swamp stage.