Biology

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community

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A group of various species that live in the same habitat

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ecosystem

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A community of organisms and their abiotic enviroment

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habitat

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A place were an organism lives

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biodiversity

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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

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succession

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

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climate

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

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biome

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

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producer

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

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consumer

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

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decomposer

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

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trophic levels

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One of the steps in a food chain or food pyramid

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energy pyramid

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

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popultation

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

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carrying capacity

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

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predation

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

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coevolution

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

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parasitism

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

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symbiosis

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

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mutualism

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

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commensalism

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

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niche

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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

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fundamental niche

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

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realized niche

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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

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competitive exclusion

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The exclusion of one species by another due to competition

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keystone species

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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