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Key Terms Chapter 5.1 - Energy Flow in Ecosystems

Across
The movement of phosphorous from the environment to organisms and then back to the environment.
A consumer that eats only producers.
The cellular process of breaking down food to yield energy.
Occurs when farmland is abandoned.
The organisms that can fix atmospheric nitrogen into a form usable by plants.
The process by which a plant uses sunlight to make sugar molecules.
A process by which carbon is cycled between the atmosphere, land, water and organisms.
The first organisms to colonize any newly available area.
An organism that makes its own food.
A sequence in which energy is transferred from one organism to the next as each organism eats another organism.
A consumer that eats producers and other consumers.
An organism that gets its energy by breaking down dead organisms.
Down
A gradual process of change and replacement of the types of species in a community.
Is a type of succession that occurs on a surface where no ecosystem existed before.
A consumer that eats other consumers.
A final and stable community (the result of succession).
Each step in the transfer of energy through a food chain or food web in an ecosystem.
An organism that gets its energy by eating other organisms.
Illustrates the many feeding relationships that are possible in an ecosystem.