Terms in this set (37)
organisms that make their own food(self nourishing)
capture of usable energy from the environment to produce organic matter
total amount of organic matter in any ecosystem
open body of water with surface inlets but no surface outlet
animals that eat other animals
Organisms that use hydrogen sulfide or other chemicals as energy source instead of light.
when no species interact through succession
Species directly affecting one another.
organisms that break down wastes and dead organisms and return raw materials to the environment
species that occur only or primarily during early stages of succession
group of species that live together and interact with each other
gradual change in living communities that follows a disturbance
A biological community of interacting organisms and their physical environment.
ecosystem energy flow
sun-->producer-->primary consumer--> secondary consumer--> tertiary consumer
The percentage of energy put into a system that does useful work
measure of disorder
first law of thermodynamics
Law of conservation of energy
A series of steps in which organisms transfer energy by eating and being eaten
A community of organisms where there are several interrelated food chains
the total amount of organic matter produced by plants in an ecosystem
A consumer that eats only plants.
Organisms not in the first trophic level, needs other organisms to survive
organism that has a large effect on its community so it's removal will lead to major changes
species that occur only or primarily in, or are dominant in, late stages in succession
Species that occur in between early or late-successional species
The gross primary production of an ecosystem minus the energy used by the producers for respiration.
Consumers that eat both plants and animals.
Conversion of light energy from the sun into chemical energy.
Amount of light energy converted to chemical energy by autotrophs.
An ecological succession that begins in an area where no biotic community previously existed
Amount of chemical energy in consumers' food that is converted to new biomass.
Succession following a disturbance that destroys a community without destroying the soil
second law of thermodynamics
Every energy transfer or transformation increases the entropy of the universe.
A series of predictable and orderly changes within an ecosystem over time.
each step in a food chain or food web
An ecosystem where all water runoff drains into a single body of water