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General Biology

Chapter 4 - Ecosystems and Communites

QuestionAnswer
The ability of a species to survive and reproduce under a range of environmental circumstances Tolerance
The general area an organism lives habitat
an organism's occupation or role in an ecosystem and also how it interacts with biotic and abiotic factors Niche
any necessity of life resource
when organisms compete for the same resource competition
States that no two species can occupy the same niche in the same habitat at the same time Competitve exclusion principal
when one organism captures and feed on another animal predation
the organism that is captured and fed upon prey
interaction in which one animal feeds on producers herbivory
species whose sudden absence inthe community can cause drastic changes Keystone species
any relationship in which two species live closely together Symbioses
relationship in which both species benefit ex. hippo/bird or protists/termites or lichens/trees mutualism
relationship in which one organism lives inside or on another organism and harms it. ex tapeworm parasitism
relationship in which one organism benefits and the other is neither helped or harmed ex. bird nest in trees commensalism
setries of more-or-less predictable changes that occur in a community over time Ecological Succession
succession that begins in an area with no remnants of an older community (one that lacks topsoil_ primary succession
first species to colonize a barren area ex. lichens pioneer species
succession that occurs where a disturbance affects an already existing community (one with topsoil) secondary succession
Aqutic succession in fresh water Euptrophication
a mature, stable commumnity that does not undergo further succession Climax communities
large areas that are characterized by a certain climax community (certain plants, animals, and climate) Biome
climate in a small area that differs from the area arount it Mictroclimate
The maximum number of individuals of a particular species that a particula r environment cona support carrying capacity
factor that controls the growth of a population Limiting facotrs
the limiting factor that depends on a population's size, or in other words a factor that has a greater impace the larger the population density size Density-dependent limiting factors
competition between differnet species interspecific competition
competition within the same species intraspecific competition
limiting factors that affect allpopulation in similar ways, regardless of population size. EX weather, seasons, natural disasters Density-independant limiting factors
Created by: bearsont
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