Mutualistic interactions

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October 27

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7 Terms

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Mutualism definition

A reciprocal relationship between two species where both benefit in terms of enhanced survival, growth, or reproduction

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Types of mutualism

Digestive mutualism

  • Trading energy for nutrients (lichens, corals, mycorrhizae, Nitrogen-fixing nodules, etc)

  • Trading food for food (ant-fungus, ruminants, termites)

  • Domestication

Defense mutualism

  • e.g. acacia

Pollination

Seed Dispersal

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Facultative mutualism

  • Each species grows to capacity in the absence of the other

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Lotka-Voltera model of mutualism

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Lotka-Voltera mutualism at equilibrium

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Lotka-Voltera mutualism is stable if:

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Stabilizing mutualistic networks

The positive effect is saturating or emerges from trophic and non-trophic effects.