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Ch 52 Intro to Eco

Terms in ecology that you should already know

abiotic the non-living component of an ecosystem
adaptation The adjustment or changes in behavior, physiology, and structure of an organism to become more suited to an environment.
alleles One of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
biodiversity The variety of life in the world or in a particular habitat or ecosystem.
biotic the living component of an ecosystem.
carrying capacity The maximum population size that can be supported by the available resources, symbolized as K.
commensalism A symbiotic relationship in which one organism benefits but the other is neither helped nor harmed.
community All the organisms that inhabit a particular area; an assemblage of populations of different species living close enough together for potential interaction.
competition A symbiotic relationship between or among living things for resources, such as food, space, shelter, mate, ecological status, etc.
ecological niche The sum of a species’ use of the biotic and abiotic resources in its environment.
ecosystem All the organisms in a given area as well as the abiotic factors with which they interact; one or more communities and the physical environment around them.
exponential growth Growth of a population in an ideal, unlimited environment, represented by a J-shaped curve when population size is plotted over time.
extinction The state or process of ceasing or causing something to cease to exist.
habitat The natural home or environment of an animal, plant, or other organism.
invasive species A species, often introduced by humans, that takes hold outside its native range.
keystone species A species that is not necessarily abundant in a community yet exerts strong control on community structure by the nature of its ecological role or niche.
logistic growth Population growth in which the growth rate decreases with increasing number of individuals until the population reaches the carrying capacity of the environment.
mimicry the resemblance of one organism to another but both are different species.
mutualism a symbiotic relationship between two organisms of different species in which both individuals benefit
natural selection The process whereby organisms better adapted to their environment tend to survive and produce more offspring.
over exploitation refers to harvesting a renewable resource to the point of diminishing returns. The stock is drawn down below the size that is self sustaining.
parasitism A symbiotic relationship in which one organism, the parasite, benefits at the expense of another, the host, by living either within or on the host.
population all the members of a particular species living in the same area.
predation An interaction between species in which one species, the predator, eats the other, the prey.
symbiosis An ecological relationship between organisms of two different species that live together in direct and intimate contact.
variation differences between two organisms in the same species.
Created by: marsenault