Branch of biology developed from natural history; scientific study of interactions among organisms and thier environments.
Non - living parts of an organism's environment.
All living organisms of an organism's environment.
The portion of Earth that supports life; high in the atmosphere to the bottom of the oceans.
Group of organisms of one species that interbreed and live in the same place at the same time.
Collection of interacting populations.
Interactins among the populations in a community and the community's physical surroundings (biotic and abiotic factors)
The physical space/place where an organism lives out its life.
Role and position a species has in its environment; when, where and how a species make its living.
Symbiotic relationship in which one species benefits and the other species is neither harmend nor benefited.
Symbiotic relartionship in which both species benefit (ex. ants and a tree)
Symbiotic relationship in which one organism benefits at the expense of the others (ex. dogs and ticks)
Organisms that use energy ( from the sun or from stored chemical compounds) to manufacture their own nutriens (Ex. plants)
Organisms that cannot make thier own food and must feed on other organisms (Ex. mammals)
An organism that uses photysnthesis ( and energy from the sun) to obtain its energy.
An organism that eats producers or other consumers to obtain its energy.
Heterotrophs that feed only on plants (Ex. grasshopers)
Heterotrophs that feed only on other animals (Ex. Lions)
Organisms that break down and absorb nutrients from dead organisms (Ex. fungi)
A simple model that scientists use to show how matter and energy move through and ecosystem.
A feeding step representing the passage of energy and materials in a food chain; more realistic that a food chain as most organisms depend on more than one specied for food.
Shows how energy flows through and ecosystem.
Heterotrophs that eat animals that have already died. (Ex. beetles)
Heterotrophs that eat both plants and animal material (Ex. Humans, Racoons)