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ecosystem all the living and nonliving things that interact in an area
habitat the place where an organism lives and that provides the things the organism needs
biotic factor a living part of an ecosystem
abiotic factor a nonliving part of an ecosystem
population all the members of one species in a particular area
community all the different populations that live together in an area
ecology the study of how living things interact with each other and their environment
population density the number of individuals in a specific area
immigration moving into a population
estimate an approximation of a number based on reasonable assumptions
emigration leaving a population
birth rate the number of births in a population in a certain amount of time
limiting factor an environmental factor that prevents a population from increasing
death rate the number of deaths in a certain amount of time
carrying capacity the largest population that an area can support
niche an organism's particular role in an ecosystem, or how it makes its living
competition the struggle between organisms for the limited resources in a habitat
predation an interaction in which one organism hunts and kills another animal for food
predator a carnivore that hunts and kills other animals for food and has adaptations that help it capture the animals it preys upon
prey an animal that a predator feeds upon
symbiosis a close relationship between 2 organisms in which at least one of the organisms benefits
mutualism a type of symbiosis in which both partners benefit from living together
commensalism a relationship between 2 species in which one species benefits and the other is neither helped nor harmed
parasitism a relationship in which one organism lives on or inside another and harms it
parasite an organism that lives on or in a host and causes harm to the host
host an organism that provides a source of energy or a suitable environment for a virus or for another organism to live
primary succession the changes that occur in an area where no ecosystem had existed
secondary succession the changes that occur after a disturbance in an ecosystem
pioneer species the first species to populate an area
Created by: leannezecco