A series of events in which one organism eats anotehr and obtains energy.
A group of land ecosystems with similar climates and organisms.
An organism that obtains energy by feeding on ther organisms
the place where a river begins.
An organsim that can make its own food.
An environment that provides the thingsan organism needs to live, grow, and reproduce
A consumer that eats only plants
The place where a river empties into another body of water.
A group of organisms that are physically similar and can mate with other and produce
an interaction in which one oranism kills another for food.
The community of organisms that live in a particular area, along with their nonliving surroundings
A consumer that eats both plants and animals
A carnivore that feeds on the bodies of dead organisms
A non-living part of an organisms habitat
All the members of one species in a particular area
a consumer that eats only animals
The struggle between organisms to survive as they attempt to use the same limited resources
An organism that breaks down wastes and dead organisms
An organism's particular role in an ecosystem
The organism that a parasite lives in or one in a parasitism interaction.
A river or stream that empties into another river or stream
The organism that benefits by living on or in a host in a parasitism interaction
A close relationship between two species that benefits at least one of the species.
A relationship between two species in which one species benefits and the other is neither helped nor harmed
the study of how living things interact with each others and their environment
a living part of an organisms habitat
A relationship in which one organism lives on or in a host and harms it.
All the different population that live together in an area.
A relationship between two species in which both species benefit
the organism that does the killing in a predation interaction.