InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Where and how does the primary succession occur? Explain. |
|
Answer» Primary succession occurs on newly cooled lava or bare rocks or newly created pond or reservoir. i. Primary succession in water • The pioneer species are phytoplanktons. • The phytoplanktons are replaced by free-floating angiosperms. • Then, rooted angiosperms invade sedges, grasses and finally the trees. • At last, a stable climax forest is formed. • An aquatic habitat is converted into mesic habitat. ii. Primary succession on rocks • Lichens are the pioneer species on a bare area. • The lichen secretes some acids to dissolve rock and help in weathering and soil formation. • Later, some small bryophytes invade and hold the small amount of soil. • The bryophytes are succeeded by herbs, shrubs and ultimately big trees. • At last, a stable climax forest is formed. • The xerophytic habitat gets converted into a mesophytic one. |
|