What Shapes an Ecosystem?

1
What Shapes an Ecosystem?

• Environmental Interactions

2
Biotic factors

• The biological (living) influences on organisms
  within an ecosystem.

3
Abiotic factors

• Physical or non living factors that shape
  ecosystems.

4
Habitat

• That area in which an organism lives.

5
Niche

• The full range of physical and biological
  conditions in which an organism lives and the way
  in which it uses those conditions.
• A niche is basically an organisms JOB!!

6
Predation

• When one organism captures and feeds on another
  organism.

7
Symbiosis

• When two species live closely together.
• Example humans and dogs!!

8
Types of symbiosis

• 1. Mutualism Both species benefit from the
  relationship.
• Ex Flowers and bees
• 2. Commensalism One member benefits and the
  other is neither helped nor harmed.
• Ex Barnacles on whales
• 3. Parasitism One organism lives on or inside
  another organism and harms it.
• Ex Tapeworms in humans intestines

9
Ecological Succession

• Predictable changes that occur in an ecosystem
  over time.
• Example When human clear a forest and put up a
  shopping mall.

10
Types of Succession

• 1. Primary Succession Succession that occurs
  where no soil previously existed.
• Example Volcanic rock changes to a tropical
  island forest over time.
• 2. Secondary Succession When a disturbance of
  some kind changes an existing community without
  removing the soil.
• Example When a wild fire burs all the forest but
  leaves the soil.

11
Pioneer Species

• The first species to populate an area.