SFR 100 - Topic #22: Biomes and Cycles page
Topic #22
Biomes and Cycles of Matter
(Campbell and Reece p. 1144-1156, 1227-1231)
I.
II.
Objectives
A.
Review what defines a forest.
B.
Forests in the context of the global scale.
C.
Summarize basic cycles of water and carbon.
What is a Forest?
A.
B.
An ecosystem (biotic + abiotic components) dominated by trees
1.
Biotic component:
2.
Abiotic, physical environment in area - “site”.
3.
Size of interacting area varies.
a)
Stand.
b)
Population.
c)
Community.
d)
Landscape.
A living system
1.
Utilizes energy
2.
Evolves over time
1
SFR 100 - Topic #22: Biomes and Cycles page
III.
IV.
Biotic factors affecting population distributions
A.
Dispersal: How far can it physically move and survive?
B.
Other species:
Abiotic factors affecting population distributions.
A.
Temperature
B.
Water
C.
Sunlight -
D.
Soil
E.
Climate
1.
Sunlight generates wind and currents
2.
Macroclimate – regional level
a)
Bodies of water
2
SFR 100 - Topic #22: Biomes and Cycles page
3.
V.
b)
Mountains
c)
Seasons affect temperatures and precipitation
d)
Latitude
Microclimate
Terrestrial Biomes
A.
Introduction.
1.
Definition.
2.
What determines distribution biomes?
B.
Tropical Rain Forests.
C.
Deserts.
3
SFR 100 - Topic #22: Biomes and Cycles page
VI.
D.
Temperate Grasslands.
E.
Temperate Broadleaf Forests
F.
Northern coniferous forest (Taiga or Boreal Forests).
G.
Tundra.
Cycles of matter
A.
Water cycle
B.
Carbon cycle
1.
Assimilation -
2.
Flow through web balances respiration with photosynthesis
4
SFR 100 - Topic #22: Biomes and Cycles page
VII.
3.
Dead organic matter fossilizes
4.
Greenhouse effect
Key Terms.
stand
population
community
landscape
living system
biotic factos
dispersal
behavior
mutualism
predation
disease
competition
abiotic factors
temperature
water
sunlight
climate
macroclimate
microclimate
biome
tropical rain forest
desert
grassland
temperate broadleaf forest
northern coniferous forest
taiga
boreal forest
tundra
water cycle
carbon cycle
greenhouse effect
5