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  • The sequence of communities of primary succession in water is: a. phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses and trees.

The sequence of communities of primary succession in water is:

a. phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses and trees.

b. phytoplankton, free-floating hydrophytes, rooted hydrophytes, sedges, grasses and trees.

c. free-floating hydrophytes, sedges, phytoplankton, rooted hydrophytes, grasses and trees.

d. phytoplankton, rooted submerged hydrophytes, floating hydrophytes, reed swamp, sedges, meadow and trees.

Answers (1)

The answer is option (d) phytoplankton, rooted submerged hydrophytes, floating hydrophytes, reed swamps, sedges, meadows, and trees.

The following is the order of the communities in the water's primary succession:
1) Phytoplankton stage: In the early stages, the main colonisers are algae and phytoplankton. After they die, they sink to the bottom of the water and break down to produce silt and humus.
2) Submerged stage: As the water depth decreases, the submerged rooted plants establish themselves. As a result, both organic and inorganic matter build up.
3) Floating stage: The leaves float on the surface of the rooted plants. The environment is unsuitable for the submerged species because of these floating leaves, which eventually die, decompose, and generate muck.

4) Reed swamp stage: The water is also ideal for emergent vegetation, such as reed grasses, which create marshes or swamps. These plants create debris and bind the mud, turning it into marshy ground.
5) Sedge-meadow stage: As vegetation covers the water's surface, species including Juncus and Gramineae take root. The soil is further bound by this. The herbs can flourish in this environment.
6) Woodland stage: The soil dries out and is ready for the growth of wet woodland. In this setting, trees and plants grow.
7) Climate forest: Depending on the grassland, it may be either forest or grassland.
Hence, (d) is the correct option.

Posted by

Gurleen Kaur

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