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Ecology Vocab.

Biosphere The part of Earth where life exists
Biome A large region characterized by a specific type of climate and certain types of plant and animal communities
Ecosystem A community of organisms and their abiotic environment
Community A group of various species that live in the same habitat and interact with each other
Population A group of organisms of the same species that live in a specific geographical area and interbreed
Species A group of orgaisms that are closely related and can mate to produce fertile offspring
Habitat The place where an organism usually lives
Niche The unique position occupied by a species
Biotic factor An environmental factor that's associated with or results from the activities of living organisms (living factor)
Abiotic factor An environmental factor that's not associated with the activities of living organisms (nonliving factor)
Food Chain The pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms
Food Web A diagram that shows the feeding relationships among organisms in an ecosystem
Parasitism A relationship in which one individual is harmed while the other individual benefits. Ex: Lice on humans
Mutualism A relationship in which both organisms derive some benefit. Ex: Oxpecker and zebra
Commensalism A relationship in which one organism benefits, but the other organism in neither helped nor harmed. Ex: Barnacles on whales
Competition A close, long-term relationship between two organisms. Ex: Polar bears fighting for food
Exponential Growth Under ideal conditions, a population will grow exponentially
Logistic Growth When a population's growth slows/stops following a period of exponential growth
Carrying Capacity The maximum population size that an environment can support over a long period of time
Ecological Succession A gradual process of change and replacement in a community
Primary Succession Has not supported life before
Secondary Succession Has supported life beofore
Density Dependent Factor A variable affected by the number of organisms present in a given day
Density Independent Factor A variable that affects a population regardless of the population density, such as climate
Climax Community A community after ecological succession that has reached a generally stable state
Mimicry A defense in which one organism resembles another that is dangerous or poisonous
Created by: archergirl