Living Environment Topic 6 Ecology

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abiotic
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any nonliving component of an environment
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autotroph
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an organism that makes its own food
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biodiversity
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the number of different species in a given area
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biosphere
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The entire portion of Earth inhabited by life; the sum of all the planet’s ecosystems.
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biotic
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the living organisms in an ecosystem
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carnivore
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a consumer that eats only animals
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carrying capacity
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The largest population that an area can support
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community
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combination of all of the different populations that live and interact in the same environment
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competition
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the struggle between organisms to survive in a habitat with limited resources
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consumer
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organism that obtains food by eating other organisms
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decomposer
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organisms, such as fungi and bacteria, that break down and absorb nutrients from dead organisms
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ecological niche
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A specific role of a species within an ecosystem, including its use of resources, and relationships with other species
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ecological succession
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series of changes by which one habitat changes into another
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ecology
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study of how organisms interact with the living and noliving things that surround them
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ecosytem
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all the living and non-living things in an enviroment, including their interactions with each other
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energy pyramid
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diagram that shows the how food energy moves through the ecosystem
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environment
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every living and non-living thing that surrounds an organism
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finite
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limited, able to be used up
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food chain
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identifies specific feeding relationships among organisms
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food web
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representation of many interconnected food chains that shows the feeding realtionships among producers, consumers and decomposers
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habitat
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where an animal or plant lives
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herbivore
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organism that eats only plants
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heterotroph
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organism that can’t make its own food, a consumer
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host
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organism in a parasitic relationship that provides the home and/or food for a parasite
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limiting factors
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environmental factors that restrict population growth
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parasite
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an organism that lives and feeds on other organisms.
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population
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all the individuals of the same species that live ina specific area
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predator
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an animal that hunts and kills other animals for food
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prey
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an animla that is hunted and killed by predators
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producer
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an organism that makes its own food
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scavenger
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A carnivore that feeds on the bodies of dead organisms

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