Community Interactions

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Community Interactions

• EQ What are the different types of relationships
  among organisms?

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• Habitat where an organism lives
• Niche an organisms specific role in its
  environment
• Ex. Place in food web

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Types of Community Interactions

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

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Competition

• Occurs when members of the same or different
  species compete for the same resource (Food,
  water, shelter, space, mates)

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Predation

• An interaction when one organism captures feeds
  on another (Predator/Prey)

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Symbiosis

• Any relationship where 2 sp. Live closely
  together
• Types of Symbiosis
• Mutualism
• Commensalism
• Parasitism

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Commensalisms
Mutualism
Parasitism
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Mutualism

• Both sp. Benefit
• EX Flowers Insects
• Gobi shrimp

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Commensalism

• One sp. Benefits, and the other is unaffected
• EX barnacles on a whale

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Parasitism

• One organism lives on or inside another and harms
  it
• EX Fleas on pets, tape worm

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Ecological Succession

• Ecosystems are constantly changing in response to
  natural and human disturbances

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• As an ecosystem changes, older inhabitants
  gradually die out and new organisms move in,
  causing further changes in the ecosystem

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Primary Succession

• Occurs on surfaces where no soil exists such as
  after volcanic eruptions, or on bare rock when
  glaciers melt.
• The first species to populate the area are called
  pioneer species such as lichen

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Secondary Succession

• Occurs after a disturbance changes the existing
  community without destroying the soil.

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Occurs when land cleared and plowed for farming
is abandoned
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Occurs when there are wildfires that burn
woodlands