Succession and Natural Selection

Succession and Natural Selection - change is a prime...

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RUNNING HEAD: SUCCESSION AND NATURAL SELECTION 1 Succession and Natural Selection Chris Bolte SCI/275 June 10, 2011 David Barraza PRIMARY OR SECONDARY SUCCESSION?
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SUCCESSION AND NATURAL SELECTION 2 After viewing the succession of the ecosystem in the Succession animation, the type explained is a secondary succession, and not a primary succession. A secondary succession takes place when soil is already present and there is a disturbance that kills existing plant life, including trees, where as a primary succession occurs when there is no soil existing in the first place and the change in species manifests in a previously uninhabited environment. A good example of primary may be rock surfaces formed by volcanic lava or glaciers. When there is a large area cleared by a forest fire or even an abandoned farm land, that begins to over grow and
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Unformatted text preview: change, is a prime example of secondary succession. NATURAL SELECTION: EVOLUTION OF SALAMANDERS Natural selection primarily states that “only the strong survive”. An aquatic salamander primarily lives in water and many of them have a set, or sets of gills. They lay their eggs in water and spend much of their lives submerged (Giles, 2002). It is characteristic of these aquatics to have short, puny front legs, no hind legs, and an eel-like appearance. The theory behind these salamanders with no back legs is that they do not need them. They can simply move around in the water better without them. Carrying that extra weight in water slows them down. SUCCESSION AND NATURAL SELECTION 3 References Giles, M. (2002). Natural Guide Journal . Retrieved from http://www.wavecrestdiscoveries.com/articles/salamander.htm...
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Succession and Natural Selection - change is a prime...

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