Question

Some of the stages in the hydrarch are labeled as
I. Marsh meadow stage
II. Reed swamp stage
III. Submerged plant stage
IV. Phytoplankton stage
V. Free-floating plant stage
Identify the choice that represents the correct sequence of these stages

• A. IV, III, V, II and I
• B. III, V, I, II and IV
• C. II, IV, III, I and V
• D. IV, V, III, II and I

Answer 1

Answer: (A)

Phytoplankton
↓(Blue-green algae, bacteria)
Rooted submerged
↓(Hydrilla, Utricularia)
Free-floating stage
↓(Nelumbo, Nymphaea, Azolla)
Reed swamp stage
↓(Lemna, Wolffia)
Sedge meadow stage
↓(Scirpus, Typha)
Woodland stage
↓(Juncus, Cyperus)
Forest stage