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Published byRalph Goodwin Modified over 9 years ago
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1. What is the difference between a biotic factor and an abiotic factor?
Biotic = living, abiotic = non-living. Biotic: animals, plants, people, etc. Abiotic: weather, temperature, rainfall, soil, etc.
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Community = All living things in an area.
2. Name three types of community interactions that can affect an ecosystem. Community = All living things in an area. Competition: organisms of same or diff. species compete for resources. Predation: one animal hunts & feeds on another. Who is competing? Who are the predators?
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2. Name three types of community interactions that can affect an ecosystem.
Symbiosis: two species living closely together.
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3. What is the difference between primary succession and secondary succession?
Primary succession = changes in ecosystem where no plants or animals to start with.
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3. What is the difference between primary succession and secondary succession?
Secondary = changes after an existing community is disturbed, e.g. by forest fire, human impact.
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4. How is an organism’s niche determined?
Niche = an organism’s role in an ecosystem, what it does. Determined by what it eats, who eats it, where it lives (habitat).
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4. How is an organism’s niche determined?
Niche = an organism’s role in an ecosystem, what it does. Determined by what it eats, who eats it, where it lives.
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All involve two species of organisms living close together.
5. How are the three types of symbiotic relationships different? Similar? Mutualism = both species benefit, e.g. flowers and bees. Commensalism = one benefits; other is not helped or hurt, e.g. whales and barnacles. Parasitism = one lives on or in the other and hurts it, e.g. tapeworms and cats. All involve two species of organisms living close together.
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Sharks, hagfish, amphipods, etc. eat decaying flesh.
6. Summarize the role of organisms, including microorganisms, in maintaining the equilibrium of a marine ecosystem while a dead whale decays on the ocean floor. Sharks, hagfish, amphipods, etc. eat decaying flesh. Crabs, snails, worms eat leftovers and nutrients in sediment.
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6. Summarize the role of organisms, including microorganisms, in maintaining the equilibrium of a marine ecosystem while a dead whale decays on the ocean floor. 3. Bacteria decompose bones. Mussels, clams, snails, crabs, worms feed on bacteria.
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Equilibrium = Everything in balance
Balance applet:
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Equilibrium = Everything in balance What happens if there are too many frogs….?
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Equilibrium = Everything in balance What happens if there are too many grasshoppers….?
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Equilibrium = Everything in balance
Balance applet:
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Equilibrium = Everything in balance
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