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Defence and Succession

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Hillary Ames

on 2 November 2012

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Transcript of Defence and Succession

DEFENSE MECHANISMS & SUCCESSION Protective colouration is protective colour, pattern, and sometines texture of an animal that allows it to stay hidden among its surroundings. An animals behaviour can be used as a defence mechanism. They may use passivce defence such as hiding, or active defence such as fleeing from their predator. One animal copies the appearance, actions or sounds of another animal, like a copycat. If an animal can trick its predator into thinking it is something less tasty or more dangerous, the animal will survive Some animals give off poisonous chemicals to ward off their predators. Some animals change colour with the seasons, while others blend in with their surroundings like the lion to allow it to hunt other animals easier. Some have a scent so that the predators know the animal is dangerous. http://devpolicy.org/confronting-capability-traps/mimicry/
http://content.lib.washington.edu/cdm4/item_viewer.php?CISOROOT=/mtsthelens&CISOPTR=154 Active defences can be more costly to the prey because they can use much more energy. Primary succession occurs when there was no previously existed community, such as when a volcanic eruption occurs and there is bare rock. Secondary succession is when there was a previously existing community. Examples could be a fire, severe flooding, or even human disturbance. Soil is already present unlike primary succession.
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