Question

Sedge meadow stage and reed swamp stage are several stages seen in.

• A. psammosere
• B. lithosere
• C. hydro-sere
• D. aerosere

Answer 1

The correct option is C hydro-sere

A hydrosere is an area of succession that is seen in an area of freshwater and it consists of seven stages:

1. Phytoplankton stage: In this stage simple forms of life like bacteria, algae and other aquatic plants (phytoplankton) and animals (zooplankton) floating in water are the pioneer colonizers.
2. Submerged stage: a loose layer of mud is formed on the bottom of the pond and some rooted submerged hydrophytes begin to appear.
3. Floating stage: submerged vegetation starts disappearing from its original place and then the floating plants make their appearance gradually in that area.
4. Reed swamp stage: floating plants start disappearing gradually and their places are occupied by amphibious plants which can live successfully in aquatic as well as the aerial environment.
5. Sedge Marsh or meadow stage: marshy soil is seen and plants adapted to this environment is seen.
6. Woodland stage: some shrubs and later medium-sized trees form open vegetation or woodland.
7. Climax forest: The hydrosere leads to the development of climax vegetation.

So, the correct option is 'hydrosere'.