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35 Cards in this Set
- Front
- Back
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define population
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organicsms of one kind in an ecosystem
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define community
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populations living and interacting with each other
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define competition
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a kind of contest among populations
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define adaptations
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its a trait or characteristic that helps an organism survive
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what do organisms compete for in an ecosystem?
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food,water,shelter and space
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define symbiosis
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a relationship between different kinds of organism
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define three kinds of symbiosis
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mutalism:both organisms benifit
commensalism:one organism benifits one is not affected paritism:one benifits one organism is harmed |
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give examples of three kinds of symbiosis
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mutalism :a rhino and a bird
commensilism: sharks and remora paritism: sea lamprey and eel |
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define predator
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animals that kills other animals
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define prey
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animals that are eaten by a prey
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what is a symbiotic relationship is most like a predator and prey relationship
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paritism
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define succesion
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a gradual change in the kinds of organisms living in an ecosystem
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what happens during primary succession?
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small hardy plants start to grow on bare rock in time they create a layer of soil that supports the larger plants
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What are pioneer plants?
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The first plants to grow, such as lichen.
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What is a climax community?
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It is when an ecosystem stops to change
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What are three causes of succession?
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when a reigion becomes dryer, when herbavors die out, and an organism that takes over.
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How can ecosystems be destroyed?
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fire, hurricanes, tornados, volcanic erruptions, human pollution
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How is secondary succession different than primary succession.
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secondary succession helps rebuild damaged ecosystems and primary succession starts on bare rock.
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Why is secondary succession faster that primary succession?
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because the soil creates a layer of soil underneath the ground
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What is the main result of primary succession and of secondary succession?
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it changes an ecosystem
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Define extinction
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it is when all of an organism dies out.
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What kinds of organisms are most likely to become extinct?
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they will have a few small populations, live only in one place, have problems adapting in a new enviroment, eat only certain foods, have few defenses against predators.
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How can a change in a climate cause extinctions?
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It can cause global warming and an animal will eventually die out.
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Define pollution
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It is any waste product that damages an ecosystem
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What resources can be polluted?
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air, water, and the ground
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What are some of the main sources of pollution?
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fertilizer, and other chemicals used on crops and lawns, decaying organic matter, burning fossil fuels, dumping toxic waste
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Define acid rain
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when fossil fuels mix with water vapor in the air and then it rains down
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Besides polluting ecosystems, in what other ways do people damage them?
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Building fences, cutting down forests, filling in wetlands, introducing new plants or animals.
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Define habitat
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The area where an organism can find everything it needs to survive.
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What are some ways that people damage ecosystems.
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polluting water, air pollution, littering, extinction, and dumping
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Define conservation
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saving resources
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What are three ways that people can conserve resources
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reuse - using resources again instead of throwing them away
reduce - use fewer resources recycle - collect used items so their raw materials can be used again |
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what are six ways that you can help protect ecosystem?
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-use rechargable batteries
-recycle old newspapers -pour juice from a large container into a glass -walk or ride a bike instead of using a car -open windows instead of turning on a/c -use glasses and dishes that can be washed again and again |
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Define reclamation
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ecosystems that can be cleaned and restored
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Why are wetlands important in a reclamation?
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because they help filter polutants out of water
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