Chapter 17 Section 1 How Organisms Interact in Communities.

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Presentation transcript:

Chapter 17 Section 1 How Organisms Interact in Communities

Evolution No organism in the environment is more important than another. Coevolution  organisms evolve together Symbiosis is 2 or more species in a relationship

Symbiosis 5 types: 1. Predation 2. Parasitism 3. Mutualism 4. Commensalism 5. Competition

Predation (+,-)

Predation One species hunts and kills another for food PredatorsPrey LionZebra WhaleFish HumanCow

Predators Evolution favors faster, stronger, quieter… individuals

Prey Evolution favors… Mimicry Secondary Compounds Defensive chemicals, smells, tastes

Parasitism (+,-)

Parasitism One species feeds on another Can live on or in another species Examples Ticks, lice, leeches, tapeworms, hookworms

Parasites Eater Do not want to kill their host

Host Eaten

Mutualism (+,+)

Mutualism Both species benefit from the relationship Examples Bees and flowers Sucker fish and Sea turtles

Commensalism (+,0)

Commensalism One species benefits and the other is neither helped nor harmed. Examples Clownfish and Sea anemone Epiphytes—plants growing on tree branches

Competition (+,-)

When 2 species use the same limited resource Resources can include: Nesting space, water, food, living space, light, minerals… Most of these interactions do not involve fighting or anything physical Competition