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CH 53

species richness number of species in a community
relative abundance how many of a species vs how many of another
species diversity considers species richness and relative abundance
individualistic hypothesis species live together because of similar abiotic requirements
interactive hypothesis species live together because of positive biotic interactions
coevolution a change in one species forces a change in another species
predation a predator eats its prey
parasitism predators live off their prey without killing them outright
parasitoidism insects lay eggs inside a host
herbivory animals eat plants
cryptic coloration camouflage
aposematic coloration warning colors to defend from predators
mimicry superficial resemblance to another species
Batesian mimicry harmless species mimics a harmful one
Mullerian mimicry two or more harmless species resemble each other
parasite predator who feeds off of a host
host organism fed on by a parasite
endoparasite live inside a host
ectoparasite feeds on the external surface of a host
competitive exclusion principle two species with similar needs cannot exist in the same place
ecological niche sum of an organisms use of biotic and abiotic resources in its environment
realized niche resources a population uses collectively
fundamental niche set of resources an organism theoretically could use
resource partitioning use resources in different ways
symbiosis species living together
parasitism one benefits, one is harmed (+/-)
commensalism one benefits, one unaffected (+/0)
mutualism both parties benefit (+/+)
keystone species species that have a very strong impact on the community structure
exotic species an introduced species
stability maintaining an equilibrium
disturbances events that damage communities
ecological succession transition in species over time
primary succession first transitions
secondary transitions established communities change
dynamic equilibrium hypothesis species diversity depends on disturbances
recruitment change in community structure due to disturbances
intermediate disturbance hypothesis diversity is greatest where disturbances are moderate in both frequency and severity
Created by: Fox Science