If this is your first pregnancy, you may not feel your baby move until closer to 25 weeks. By the second pregnancy, some women start to feel movements as early as 13 weeks.
exists and is an alternate of. Merge this question into. Split and merge into it. Answer by Mayra03. Confidence votes 145. A landslide or volcanic eruption is a kind of primary disturbance. It causes a very drastic and sudden change in the landscape.ecomposition is not a disturbance of the ecosystem. This is because it is a natural process in harmony with the ecosystem rather than an outside force is interfering.
Secondary succession. Definition. noun. The ecological succession that occurs on a preexisting soil after the primary succession has been disrupted or destroyed due to a disturbance that reduced the population of the initial inhabitants. Supplement.n example of secondary succession is the development of new inhabitants to replace the previous community of plants and animals that has been disrupted or disturbed by an event (e.g. forest fire, flood, harvesting, epidemic disease, pest attack, etc .). Compare: primary succession. See also: ecological succession.