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Ecology Unit
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Science Content Guiding Questions |
What is the difference between a population, community and ecosystem?
Organisms find these needs in their habitat
- Food
- Water
- Space
- A place to reproduce
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Description |
Example |
| Population |
One type of organism living in the same habitat |
A herd of deer |
| Community |
More then one type of organism living in the same habitat |
Deer, trees, insects, bacteria, mushrooms, wolves , flowers |
| Ecosystem |
The living and nonliving things in a habitat |
Deer, trees, insects, bacteria, mushrooms, wolves , flowers, sun, lake, soil, rocks, rain, snow, heat |
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| Fill In Venn Diagram that compares and contrasts Population, Community, and Ecosystem |
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What are the roles of producer, consumer, and decomposer?
Every organism also has a niche in its habitat. A niche is an organisms job or what the organism does in the habitat. No two organisms have the same niche.
Some niche's include
Predator: An animal that eats another animal.
Prey: The animal that gets eaten
Producer: An orgainsm that gets its energy from the sun, such as a plant.
Consumer: An animal that eats another animal for energy and nutrients, they are at 3 levels.
Primary Consumer: An animal that eats a producer (plant).
Secondary Consumer: An animal that eats a primary consumer.
Tirtiary Consumer: An animal that eats a secondary consumer.
Decomposer: An organism that gets its energy and nutrients from dead organisms and turns them into soil, such as fungi and bacteria.
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How does energy move through a food web?
All the food chains in a habitat are put together in a food web to show how the food chains overlap. Energy starts with the sun, then goes to plants and then consumers. |
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What is the relationship between a good chain and a food web?
Food Chains and Food Web Video password required |
The energy pyramid tell us two things about how energy moves in an ecosystem:
1. In an ecosystem the producers have the most energy and the amount of energy goes down as you move up the pyramid, the tertiary consumers have the least amount of energy in an ecosystem.
2. The producers in an ecosystem have the largest population and the size of the population goes down as you move up the pyramid, the tertiary consumers have the smallest population in an ecosystem.
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7. What is the relationship between Predator and Prey?
A predator is an animal that eats another animal. The animal getting eaten is the prey.
The graph above shows that as the population of the predator (fox) gets too high then the prey population (rabbit) goes down. When the prey population goes down then the predator doesn't have enough food and the prey population goes down. Because there are less predators then the prey population goes back up. This goes on and on and on.... |
How do animal interact in your ecosystem?
Minnesota DNR Ecosystems: Facts about ecosystems
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