StriVectin is one of the leading names in stretch mark removal creams. This product claims to improve the appearance of both stretch marks and wrinkles, with visible results as early as two weeks after beginning a regular beauty regime. However, some marks may take up to eight weeks to show improvement.
Primary succession. Definition. noun. An ecological succession that occurs following an opening of uninhabited, barren habitat or that occurs on an environment that is devoid of vegetation and usually lacking topsoil. Supplement.
In primary succession, bare rock or sand is the substrate upon which the pioneer species act. Primary succession occurs in places that are the result of lava flows or where glaciers have retreated. Soil is not yet present, so no plants or animals can survive in such a region.Pioneer species are the lichens and moss.