BIO FINAL: pt. 3

• occurs when resources need to overlap
• when fundamental niche spaces overlap

competition between individuals of different species (or between species)

competition between individuals of the same species

• interference competition
• exploitative competition

• direct attack on a competitor
• ex. corals fight each other

preventing competitor from accessing resources without attacking

• -whenever 2 species are competing for the same resource it will deplete faster
• -the resource will not be enough for pop.
• -the individual who can best use it will survive
• -two species with identical or very similiar niche spaces can't live together indefinitely
• -resource partitioning

only way for species with similiar niche places to coexist

• 1. evolve or acclimate to use different resources
• 2. use similiar resources but at different times
• 3. use resources in different microhabitats

Joe Connel switched barnacle species from upper and lower intertidal and found that competition with B prevents C from living in the lower intertidal

found that enviromental stress (temp. and dessication) prevents B from living in a higher intertidal

+/-

facilitation; presence of one species benefits aother

close associations between species that have evolved

parasite benefits and host is hurt (+/-)

one organism benefits while the other isn't hurt or helped (+/-)

when both organisms benefit (+/+)

species that have a disproportionitely large impact on their community

monoculture of climax species

only bare rock

patches at all different stages, maximizes the number of species