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NEET2009BotanyEcosystemActual

The correct sequence of plants in a hydrosere is

Options

  1. AOak Lantana Scirpus Pistia Hydrilla Volvox
  2. BVolvax Hydrilla Pistia Scirpus Lantana Oak
  3. CPistia Volvox Scirpus Hydrilla Oak Lantana
  4. DOak Lantana Volvox Hydrilla Pistia Scirpus

Correct answer

B. Volvax Hydrilla Pistia Scirpus Lantana Oak

Step-by-step solution

The various stages in a hydrosere are well studied in ponds, pools or lakes. The various stages of hydrosere are: (i) Phytoplankton stage, eg, Some blue-green algae, green algae (Volvox), diatoms and bacteria, etc. (ii) Rooted submerged stage, eg Hydrilla, Vallisneria, etc. (iii) Floating stage, eg, Nelumbo, Nymphaea, etc. Some free floating species are Pistia, Azolla, Lemna, etc. (iv) Red-swamp stage, eg, Species of Scirpus, Typha, etc. (v) Sedge-meadow stage, eg, Species of Cyperaceae and Gramineae. (vi) Woodland

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