Ecology Flashcards

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Niche

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The role or function of an organism or species within an ecosystem, including its use of resources and relationships with other organisms.

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Producer

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Organisms, like plants and algae, that produce their own food through photosynthesis and serve as a food source for other organisms in the ecosystem.

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Consumer

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Organisms that obtain energy by feeding on other organisms or organic matter.

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Trophic Level

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The position an organism occupies in a food chain, determined by the number of energy-transfer steps to that level.

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Greenhouse Gas

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Gases in Earth's atmosphere that trap heat, such as carbon dioxide, methane, and water vapor.

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Community Definition

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A community is a group of organisms of different species that live in the same area at the same time.

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Symbiosis: Mutualism

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Mutualism, where both organisms benefit.

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Symbiosis: Commensalism

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Commensalism, where one organism benefits and the other is neither helped nor harmed.

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When not in hibernation, an average grizzly bear in Alaska can eat 30 lbs or more of salmon in a single day. When the salmon are not available, the grizzly can eat 60 lbs of small fruits and other vegetation. Grizzly bears are _______ eating both plants and animals.

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Omnivores

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Commensalism

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A relationship where one organism benefits and the other is neither helped nor harmed.