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ecology chapter 1

Ecology and the environment chapter 1

organism A living thing
Habitat An environment that provides the things a specific organism needs to live, grow, and reproduce
biotic factor A living or once living part of an organisms habitat
abiotic factor A nonliving part of an organism's habitat
species A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce
population All members of one species living in the same area
community All the different populations that live together in a particular area
ecosystem The community of organisms that line in a particular area, along with their nonliving environment
ecology The study of how organisms interact with each other and their environment
birth rate number of births per 1,000 individuals for a certain time period
death rate number of deaths per 1,000 individuals for a certain time period
immigration Movement of individuals into a populations area
emigration Movement of individuals out a populations area
population density The number of individuals in an area of a specific size
limiting factor An environmental factor that causes a population to decrease in size
carrying capacity The largest population that a particular environment can support
natural selection The process by which organisms that are best adapted to their environment are most likely to survive and reproduce
adaptation An inherited behavior or physical characteristic that helps and organism survive and reproduce in its enviroment
niche How and organism makes its living and interacts with the biotic and abiotic factors in its habitat
competition The struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time
predation An interaction in which one organism kills another for food and nutrients
predator The organisms that does the killing in a predation interaction
prey An organism that is killed and eaten by another organism in a predation interaction
symbiosis Any relationship in which two species live closely together and that benefits at least one of the species
mutualism Any type of symbiosis in which both species benefit from living together
commensalism Any type of symbiosis between two species in which one species benefits and the other species in neither helped nor harmed
parasitism Any type of symbiosis in which one organism lives with, on, or in a host and harms it
host An organism that a parasite lives with, in or on, and provides a source of energy or a suitable environment for the parasite to live
succession The series of predictable changes that occur in a community over time
primary succession The series of change that occur in an area where no soil or organism exist
pioneer species The first species to populate and area during succession
secondary succession The series of changes that occur in an area where the ecosystem has been disturbed, but where soil and organisms still exist
Created by: monnier