communities & biomes biotic & abiotic factors biotic = living organisms abiotic = nonliving...
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Communities & Biomes
Biotic & Abiotic FactorsBiotic = Living organisms
Abiotic = Nonliving Soil,Air,Water Substrate
1.Community: Biotic factors
All the Plants & Animals
In a given area? Community
of Del Mar
Forest Community …………..
•Deciduous trees•Deer•Fox•Skunks•Insects•Shrubs•Grasses
Ecosystem: Both biotic and abiotic factors in a large area:
2. Limiting FactorLimits GrowthBiotic or AbioticToo much orToo little
Ranges of Tolerance
0
20
40
60
80
100
10 15 20 25 30snail
Range over which a population or organism can successfully survive & grow
Too much or too little of an environmental factor can be limiting
3. Succession Orderly
change Over time Natural Species
Replacement In a
community or ecosystem
Succession communities:
1. Pioneer species
2. Intermediate species
3. Climax community
Pioneer species:
Lichens (algae & fungi) break apart rock to make soil
Grasses Annual flowers Mosses
Climax Community: final set of organisms suited to that climate
Deciduous Climax Forest
San Diego Coastal Sage & Chaparral Climax Community
Types of SuccessionPrimary 1st time plants
or animals are
established New island Volcanoes Bare soil, rock
Secondary After a “blowout” Re-establish a
community Already had
living organisms Fire, flood,
human disruption
New island= Primary Succession
Secondary Succession will follow!
Primary Or Secondary?
BOTH PRIMARY & SECONDARY have
these Succession communities:
1. Pioneer species
2. Intermediate species
3. Climax community
Biome biotic
community
dominant plants and animals
unique climateBiomes of the World
BIOMESTundraConiferous ForestDeciduous ForestDesertGrasslandRainforestSee Biome PP for examples
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