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Chapter 4 Ecology
N/A
16
Biology
9th Grade
09/24/2012

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Term
community
Definition
a group of various species that live in the same habitat and interact with each other
Term
ecosystem
Definition
a community of organisms and their abiotic environment
Term
habitat
Definition
the place where an organism usually lives
Term
biodiversity
Definition
the variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem
Term
succession
Definition
the replacement of one type of community by another at a single location over a period of time
Term
climate
Definition
the average weather conditions in an area over a long period of time
Term
biome
Definition
a large region characterized by a specific type of climate and certain types of plant and animal communities
Term
producer
Definition
an organism that can make organic molecules from inorganic molecules; a photosynthetic or chemosynthetic autotroph that serves as the basic food source in an ecosystem
Term
consumer
Definition
an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources
Term
decomposer
Definition
an organism that feeds by breaking down organic matter from dead organisms; examples include bacteria and fungi
Term
trophic level
Definition
one of the steps in a food chain or food pyramid; examples include producers and primary, secondary, and tertiary consumers
Term
energy pyramid
Definition
a triangular diagram that shows an ecosystem's loss of energy, which results as energy passes through the ecosystem's food chain; each row in the pyramid represents a trophic (feeding) level in an ecosystem, and the area of a row represents the energy stored in that trophic level
Term
carbon cycle
Definition
the movement of carbon from the nonliving environment into living things and back
Term
respiration (in biology)
Definition
in biology, the exchange of oxygen and carbon dioxide between living cells and their environment; includes breathing and cellular respiration
Term
nitrogen cycle
Definition
the cycling of nitrogen between organisms, soil, water, and the atmosphere
Term
phosphorus cycle
Definition
the cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment
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