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secondary succession - stalked its prey silently of hard...

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For this exercise we all looked at an animation and had to answer if it was primary or secondary succession. This animation was a very good example of secondary succession. This is secondary because there was already soil and plants established in the area before the enterprising beaver flooded the area. That means that any changes in the animal species that may have taken place would have been caused by changes in existing environment. Even the soil and plants already in place in this area but when stream was damned up and the area flooded would have changed drastically. Trees would not have had the support for the root system that supported them, when the trees died off the animals that depended on them for food and shelter would have had to adapt, died off or moved away. Animals in this area would have had to change their diets and possible where they lived and how they hunted for food. For example an animal that normally
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Unformatted text preview: stalked its prey silently of hard ground would have a hard time doing that in soft boggy ground. Also as the area turned from a flooded forest area to the bog any fish inhabiting the area would have had to move upstream or they would have died off. Although most salamanders have four legs, the aquatic salamander shown below resembles an eel. It lacks hind limbs and has very tiny forelimbs. Propose a hypothesis to explain how limbless salamanders evolved according to Darwin's theory of natural selection. Because they live in water the limbless salamander may have come about because they could move faster without their legs. Salamanders with shorter legs would have been faster and gotten more food and better chance at mating. Also in a water environment being able to swim faster meant you could avoid being something else’s dinner....
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