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.
Difference Between Primary and Secondary Succession. âSuccessionâ is a series of complex processes taking place in the environment due to various driving forces governed by nature. The main causes leading to succession are climatic factors such as erosion, wind, fire, and volcanic activities.