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ES Ch 1 Vocab

Ecosystem All the living and nonliving things that interact in an area
habitats the place where an organism lives and that provides the things it needs
biotic factor a living part of an ecosystem
abiotic factor the nonliving part of an ecosystem
species a group of organisms that are similar and reproduce to produce fertile offspring
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
immigration moving into a populatioin
emigration moving out of a population
limiting factors an environmental factor that prevents a population from increasing
carrying capacity the largest population that an area can support
natural selection Process by which individuals that are better adapted to the environment are more likely to survive and reproduce than others.
adaptations the behaviors and physical characteristics of species that allow them to live successfully in their environment.
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
Predator The organism that does the killing in predation
Prey An organism that is killed in predation
Symbiosis A close relationship between species that benefits at least one of the species
Mutualism A relationship between two species in which both species benefit
Commensalism A relationship between two species in which one species benefits and the other i neither helped or harmed
Parasitism A relationship in which one organism lives on or inside another and harms it
Parasite The organism that benefits by living on or in a host in parasitism
Host The organism that a parasite lives in or on in parasitism
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