1. or How Do We Live Together?
Interactions of Life or
How Do We Live Together?
Martin 2009

2. Ecology
Ecology: The study of the interactions of organisms with each other and with their environment
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3. The Biosphere
The part of the earth that supports life is called the Biosphere
The top portion of the earth’s crust
All waters
The atmosphere
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4. Ecosystems Ecosystem includes
Biotic factors: All the living organisms in an area
Abiotic Factors: All the nonliving features of the environment (water, temperature, sunlight, soil)
“Bio” means _____________?
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5. Review: Community: all the populations in an area
Population: all the organisms of a single species that live share a gene pool (live close enough to interbreed)
Species: organisms with similar characteristics that can interbreed to produce fertile offspring
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6. Putting it Together
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7. A Pond Community: What populations live in this community?
What abiotic factors could impact this community?
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8. Habitat The place where an organism lives is its habitat.
This howler monkey lives in a rainforest ecosystem. Its habitat is the forest canopy
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9. Habitat
This capybara also lives in the rainforest ecosystem, but its habitat is the forest floor
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10. Limits on Population Size
Competition
Food
Space
Limiting factors
Anything that restricts the number of individuals (food, nesting sites)
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11. Carrying Capacity
The largest number of individuals of one species that an ecosystem can support is called the
Carrying Capacity
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12. Feeding Interactions
Producers: use outside energy (sun) to make energy-rich molecules (glucose)
Primary Consumers: eat producers
Secondary Consumers: eat primary consumers
Tertiary Consumers: eat secondary consumers
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13. A Food Web
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14. Another Food Web
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15. One Biosphere, One Chance
Tundra
Taiga
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16. One Biosphere, One Chance
Grasslands
Temperate Deciduous
Forest
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17. One Biosphere, One chance
Tropical Rainforest
Desert
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18. One Biosphere, One Chance
Freshwater
Marine
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19. Our Responsibility
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