10 (3).ppt - Interactions Can be classified as 1 Interspecific 2 Predation 3 Symbiosis It is competition between members of different species The weaker

10 (3).ppt - Interactions Can be classified as 1...

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Interactions
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Can be classified as: 1. Interspecific 2. Predation 3. Symbiosis
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It is competition between members of different species
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The weaker competitor declines Some organisms may migrate to another habitat
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It is a (+/−) interaction between species one organism, directly feeds upon another E.g. weevils eating seeds
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It results in the population density of one species (predator) increasing while the other (prey) decreases.
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Some predator- prey relationships are steady and show a cyclical pattern. The graph is called a sinusoidal curve.
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Are used by insects, plants & animals It protects them from predators
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Some plants: have spines, hooks or needles or use chemicals they can make themselves distasteful Or mimic the growth hormone of an insect…killing it
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Some animals: have horns
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Use camouflage
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  • Winter '17
  • John Travis
  • A. Mutualism, mimic species, harmless species

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