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Warm Up. Shown here is some lichen on a rock . . A. What is lichen? B. What type of biotic interaction would it be classified as? Why? C. What role does it serve in ecological succession?

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warm up
Warm Up

Shown here is some lichen on a rock . .

  • A. What is lichen?
  • B. What type of biotic interaction would it be classified as? Why?
  • C. What role does it serve in ecological succession?

Once you’ve answered the questions above, sign up for a biome to do your homework on – the sign up is on the front board on the clipboard

niche vs habitat
Niche vs. habitat

Habitat

the address

Niche

the role

biotic interactions
Biotic Interactions

Competition & the Competitive Exclusion Principle

biotic interactions1
Biotic Interactions

Predation (+/-)

symbiotic biotic interactions
Symbiotic Biotic Interactions

Mutualism (+/+)ant/catepillar

Commensalism (+/0)

Parasitism (+/-) (how’s this different from predation?)

succession
Succession
  • Orderly change over time of natural species replacement in a community or ecosystem
succession communities
Succession communities:

3. Climax

community

2. Intermediate

species

  • Pioneer
  • species
pioneer species
Pioneer species:
  • Lichens (algae & fungi) break apart rock to make soil
  • Grasses
  • Annual flowers
  • Mosses
types of succession
Primary

1st time plants

or animals are

established

New island

Volcanoes

Glaciers

Bare soil, rock

Secondary

After a “blowout”

Re-establish a community

Already had living organisms

Fire, flood, human disruption

Types of Succession
both primary secondary have these succession communities
BOTH PRIMARY & SECONDARY have these Succession communities:

3. Climax

community

2. Intermediate

species

  • Pioneer
  • species