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25 Cards in this Set

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community



A group of various species that live in the same habitat

ecosystem

A community of organisms and their abiotic enviroment

habitat

A place were an organism lives

biodiversity

The variety of organisms in a given area the genetic variation within a population the variety of species in a community or the variety of communities in an ecosystem

succession

The replacement of one type of community by another at a single location over a period of time

climate

The average weather conditions in a area over a long period of time

biome

A large region characterized by a specific type of climate and certain types of plant and animal communities

producer

A photosynthetic or chemosynthetic autotroph that serves as the basic food source in an ecosystem

consumer

An organism that eats other organisms or organic matter instead of producing its own materials or obtaining other nutrients from inorganic sources

decomposer

An organism that feeds by breaking down organic matter from dead organisms.

trophic levels

One of the steps in a food chain or food pyramid

energy pyramid

A triangular diagram that shows an ecosystems loss of energy, which results as energy passes through the ecosystem's food chain

popultation

A group of organisms of the same species that live in a specific geographical area and interbreed

carrying capacity

The largest population that an environment can support at any given time

predation

An interaction between two organisms in which one organism, the predator, kills and feed on the other organism, the prey

coevolution

The evolution of two or more species that is due to mutual influence

parasitism

A relationship between two species, in which one species, the parasite, benefits from the other species, the host, which is harmed

symbiosis

A relationship in which two different organisms live close association with each other

mutualism

A relationship in which both of the species benefit from each other

commensalism

A relationship between two organisms in which one organism benefits and the other is unaffected

niche

The unique position occupied by a species, both in terms of it's physical use of it habitat, and it's function within an ecological community

fundamental niche

The largest ecological niche where an organism or species can live without competition

realized niche

The range of resources that a species uses, the conditions that the species can tolerate, and the function roles that the species plays as a result of competition in the species' fundamental niche

competitive exclusion

The exclusion of one species by another due to competition

keystone species

A species that is critical to the functioning of the ecosystem in which it lives because it affects the survival and abundance of many species in it's community