A single, individual living thing.
A group of the same species living together in the same area at the same time.
A collection of different species living together in the same area at the same time.
All of the species in an area, along with all of the abiotic factors.
Living and once living things in an ecosystem.
Non-living and never living things in an ecosystem.
The study of the interactions among living things and their environment.
Make their own food, and their ultimate source of energy is generally the sun.
Cannot make their own food, and must consume to obtain energy.
Eats only plants.
Eats only other animals.
Eats both plants and other animals.
Eats already dead animals.
Breaks down dead organisms.
The path of energy from one trophic level to the next.
An interconnected group of food webs.
A species that is not native to an ecosystem that causes environmental or economic harm.
Population growth unchecked by limiting factors.
Anything that helps keep down the size of a population.
Population growth that is slowed by limiting factors.
The maximum population size that an ecosystem can support.
The act of one organism killing another for food.
A species that plays a critical role in maintaining the structure of an ecological community and whose impact on the community is greater than would be expected based on its relative abundance or total biomass.