1. Ecology

2. Levels of Organization
Figure 3-2 Ecological Levels of Organization
Levels of Organization
Section 3-1
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3. Percent of Living Organisms
Species Diversity
Percent of Living Organisms
Section 6-3
Insects
54.4%
Protists
Other Animals
4.2%
19.7%
Plants
18%
Bacteria
Fungi
0.3%
3.4%
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4. Interest Grabber
Fitting In
Section 4-2
Organisms not only live together in ecological communities, but they also constantly interact with one another. These interactions, which include predation and competition, help shape the ecosystem in which they live.
1. Based on your own experiences, define predation. Give one example of predation.
2. Based on your own experiences, define competition. Give one example of competition.
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5. Abiotic and Biotic Factors
Section 4-2
Abiotic Factors
Biotic Factors
ECOSYSTEM
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6. Habitat vs. Niche Habitat- place where an organism lives
Niche- the use of its habitat and its function/ role in the community

7. Niche
Fundamental niche- the entire range where an organism could survive.
Realized niche- actual area in a community that an organism occupies due to competition.

8. Figure 4-5 Three Species of Warblers and Their Niches
Section 4-2
Cape May Warbler
Feeds at the tips of branches
near the top of the tree
Bay-Breasted Warbler
Feeds in the middle
part of the tree
Yellow-Rumped Warbler
Feeds in the lower part of the tree and
at the bases of the middle branches
Spruce tree
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9. Food Web
Section 3-2
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10. Ecological Pyramids Section 3-2 Energy Pyramid
Shows the relative amount of
energy available at each trophic
level. Organisms use about 10
percent of this
energy for
life processes.
The rest is lost
as heat.
Pyramid of Numbers
Shows the relative
number of individual
organisms at each
trophic level.
Biomass Pyramid
Represents the amount of
living organic matter at each
trophic level. Typically, the
greatest biomass is at the
base of the pyramid.
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11. Movement of toxin through a food chain. Increases 10x/level
Biomagnification
Movement of toxin through a food chain.
Increases 10x/level

12. Figure 6-16 Biological Magnification of DDT
Section 6-3
Magnification of
DDT Concentration
Fish-Eating Birds
10,000,000
Large
Fish
1,000,000
100,000
Small Fish
10,000
Zooplankton
1000
Producers
Water 1
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13. Water Cycle

14. Carbon Cycle Figure 3-13 The Carbon Cycle Section 3-3 CO2 in
Atmosphere
CO2 in Ocean
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15. Nitrogen Cycle NO3- and NO2- NH4+ Section 3-3 Go to Section:
N2 in Atmosphere
NO3-
and NO2-
NH4+
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16. Nitrogen Cycle

17. Phosphorus Cycle