Multiple choice

In a newly grown pond or lake, the development of similar biotic communities is called hydrosere. What are the sucession stages of hydrosere?

  1. primary, secondary & finally matured

  2. Seed Germination, development of vegetation, flowering & seed- development of fruits, matured plants

  3. Preparing and completing compost, spawning, casing, pinning and cropping

  4. Phytoplankton, rooted submerged, floating, reed-swamp, sedge meadow, woodland and climax stage

  5. Germination, seedling, growth of vegetation, preflowering followed by flowering and finally seed
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phytoplankton stage is composed of pioneers or primary colonizers, which include green algae, blue-green algae, diatoms, bacteria. In rooted submerged stage at the bottom of such water bodies, soft mud is formed due to diminution & decomposition of phytoplankton. In floating stage, the root of the plants are fixed firmly and leaves float at the surface of water. In reed-swamp stage, though the plants are rooted but most parts of their young branches are uncovered & exposed to environment. In sedge meadow stage, water level is decreased rapidly due to excess transpiration & the soft mud portion begins to expose. In woodland stage, it becomes dry over the time. Forest stage is ultimate stage where dense vegetation is developed forming dense forest.

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