A relationship between two different species.
symbiotic relationship in which both species benefit from the relationship
symbiotic relationship in which one member of the association benefits and the other is neither helped nor harmed
the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it (usually not fatal damage)
scientific study of interactions among organisms and between organisms and their environment
organism's role, or job, in its habitat
any animal that lives by preying on other animals
animal hunted or caught for food
an organism that makes its own food
an organism that obtains energy by feeding on other organisms
group of ecosystems that have the same climate and dominant communities
a vast treeless plain in the arctic regions between the ice cap and the tree line
the largest terrestrial biome dominated by evergreen trees.
mild tempatured forest that are dominated by non-evergreen trees
tropical rain forest
biome near the equator with warm temperatures, wet weather, and lush plant growth
an arid region with little or no vegetation
a system formed by the interaction of a community of organisms with their physical environment
the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist
largest number of individuals of a population that a environment can support
physical, or nonliving, factor that shapes an ecosystem
biological influence on organisms within an ecosystem, a living part of an ecosystem
Organisms that break down the dead remains of other organisms
an organism that eats both plants and animals.
the type of environment in which an organism or group normally lives or occurs
any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms.
series of steps in an ecosystem in which organisms transfer energy by eating and being eaten
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