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Unit 5 Ecosystems

QuestionAnswer
Habitat An environment that provides the resources a specific organism needs to survive.
biotic factor a living or once living part of an organism' habitat Ex: plants, animals, organism's waste products, etc.
abiotic factor a nonliving part of an organism's habitat Ex: water, oxygen, rocks, weather, etc.
Population all members of one species living in the same area.
Community all different populations that live together in the same area.
Ecosystem the community of organisms that live in a particular area, along with their nonliving environment.
immigration moving into a population
emigration moving out of a population
Limiting Factor an environmental factor that causes a population to decrease in size Ex: access to food and water, changes in climate and weather, availability of space and shelter
Producer an organism that can make its own food Ex: plants, bacteria, alge, etc.
Consumers an organism that cannot make its own food.
Carnivores consumers that only eat animals (meat) Ex: sharks, owls, tigers, etc.
Scavengers consumers that are carnivores that feed on the bodies of dead organisms Ex: hagfish, condors, etc.
herbivores consumers that only eat plants and other photosynthetic organisms. Ex: grasshoppers, rabbits, cows, etc.
omnivores consumers that eat both animals and plants Ex: humans, raccoons, pigs, etc.
Decomposer an organism that gets energy by breaking down biotic wastes and dead organisms and returns the raw materials to the soil and water. Ex: mushrooms, bacteria, worms, etc.
Food Chain A model used to show a series of events in which one organism eats another organism to obtain energy and matter.
Food Web A model used to show overlapping food chains within an ecosystem
Energy Pyramid A diagram that shows the amount of energy that moves from one organism to another in a food web.
Created by: staylor19
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