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30 Cards in this Set

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  • Back
Abiotic
nonliving parts of the environment
Autotroph
An organism that produces its own food; the source of energy for all other living things on earth
Biodiversity
The variety of species in an area
Biosphere
All of Earth's ecosystems, collectively; the biologically inhabited portions of Earth, including all of the water, land, and air in which organisms survive
Biotic
The living parts of the environment
Carnivore
An organsim that survives only by eating animals
Carrying capacity
the largest population of any single species that an area can support
Community
a combination of all different populations that live and interact in the same environment
Competition
the struggle between organisms for the same limited resources in a particular area
Consumer
an organism that obtains its energy from producers
Decomposer
an organism, generally a bacterium or fungus, that ocnsumes dead organisms and organic waste
Ecology
The study of how living things interact with one another and with their environment
Ecological niche
the specific role played by an organism or a population of organisms in the ecosystem
Ecological succession
The process by which an existing community is replaced by another community
Ecosystem
all living and nonliving things that interact in a specific area; a subdivision of the environment
Energy pyramid
a diagram showing how food energy moves through the ecosystem
Environment
Every living and nonliving thing that surrounds an organism
Food Chain
a representation that identifies the specific feeding relationships among organisms
Food web
a representation of many interconnected food chain that shows the feeding relationships among producers, consumers, and decomposers
Habitat
the place where an animal or plant lives
Herbivore
an organism that eats only plants
Heterotroph
an organism that cannot make its own food; a consumer
Host
the organism in a parsasitic relationship that provides a home and/or food for the parasite
Limiting factors
any factor in the environment that limits the size of a population
Parasite
an organism that survives by living and feeding on other organisms
Population
all the individuals of a single species that live in a specific area
Predator
an animal that hunts and kills other animals for food
Prey
an animal that is hunted and killed by predators
Producer
an organism that makes its own food from light energy and inorganic materials
Scavenger
a carnivore that fees on the bodies of dead organisms