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Ecology

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