Primary succession in aquatic ecosystems starts with basic plant life and progresses to more complex forms. The typical sequence is:
The stages, ordered from latest to earliest, are: (A), (C), (B), (D).
| List-I (Concept) | List-II (Proposed by) |
| (A) Ecology | (II) Norman Myers |
| (B) Ecosystem | (IV) Ernst Haeckel |
| (C) Human population growth | (I) Sir Arthur Tansley |
| (D) Hot spots | (III) T R Malthus |