1. Communities & Biomes

2. Biotic & Abiotic Factors
Living organisms
Abiotic =
Nonliving
Soil,Air,Water
Substrate

3. 1.Community: Biotic factors
All the Plants & Animals
In a given area
? Community of Del Mar

4. Forest Community ………….. Deciduous trees Deer Fox Skunks Insects Shrubs
Grasses

5. Ecosystem: Both biotic and abiotic factors in a large area:

6. 2. Limiting Factor Limits Growth Biotic or Abiotic Too much or
Too little

7. Ranges of Tolerance
Range over which a population or organism can successfully survive & grow
Too much or too little of an environmental factor can be limiting

8. 3. Succession Orderly change Over time Natural Species Replacement
In a community or ecosystem

9. Succession communities:
3. Climax
community
2. Intermediate
species
Pioneer
species

10. Pioneer species: Lichens (algae & fungi) break apart rock to make soil
Grasses
Annual flowers
Mosses

11. Climax Community: final set of organisms suited to that climate

12. Deciduous Climax Forest

13. San Diego Coastal Sage & Chaparral Climax Community

14. Types of Succession Secondary Primary After a “blowout”
Re-establish a community
Already had living organisms
Fire, flood, human disruption
Primary
1st time plants
or animals are
established
New island
Volcanoes
Bare soil, rock

15. New island= Primary Succession

16. Secondary Succession will follow!

17. Primary Or Secondary?

18. BOTH PRIMARY & SECONDARY have these Succession communities:
3. Climax
community
2. Intermediate
species
Pioneer
species

19. Biome biotic community dominant plants and animals unique climate
Biomes of the World

20. BIOMES Tundra Coniferous Forest Deciduous Forest Desert Grassland
Rainforest
See Biome PP for examples