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19 terms

AP Biology Review - Ecology part 2

This is a study guide under the subject of (Community) Ecology for the AP Biology Test. Good luck! Pt. 2 Pt. 1 is located here: http://quizlet.com/863177/ap-biology-review-ecology-part-1-flash-cards/ ------ Pt. 3 is located here: http://quizlet.com/864839/ap-biology-review-ecology-part-3-flash-cards/
STUDY
PLAY
Community Ecology
Study of the interaction of populations
Interspecific Competition
Form of interaction; is the competition between different species.
Competitive Exclusion Principle (Gause's principle)
When two species compete for exactly the same resources (or occupy the same niche), one is likely to be more successful. One species lives, the other is eliminated.
Resource Partitioning
Some species coexist in spite of apparent competition for the same resources.
Character displacement (niche shift)
Result of resource partitioning, certain characteristics may enable individuals to obtain resources in their partitions more successfully.
Realized/Fundamental niche
Niche that an organism occupies in the absence of competing species.
Niche Overlap
When species must compete with others for the same resources
Predation
Form of community interaction where an animal feeds on a plant or other animal
True predator
Animal that kills and eats other animals
Parasite
Animal that spends most or all of its life living on another organism, obtaining nourishment from the host by feeding on tissues
Parasitoid
Insect that lays its eggs on a host. After hatching, the eggs feed off the tissues of the host
Herbivore
Animal that eats plants.
Granivores
Seed eaters that act like predators by totally consuming organisms
Grazers
Animals that eat grasses or leaves of other plants
Browsers
Animals that may eat only part of a plant but may weaken it in the process
Symbiosis
Two species that live together in close contact during a portion of their lives
Mutualism
Form of symbiosis that is a relationship in which both species benefit.
Commensalismm
Form of symbiosis where one species benefits while the second is neither helped nor harmed
Parasitism
Form of symbiosis where the parasite benefits while the host is harmed.