Transcript Competition

HOW ORGANISM INTERACT IN COMMUNITIES
WHAT SHAPES A COMMUNITY??
PREDATION & COMPETITION!!
(food, habitat, light, nutrients, water)
Five Basic Interactions Between Species
1) Interspecific competition – between two or more species
2) Intraspecific competition – between members of same species
3) Predation
4) Parasitism
5) Mutualism
6) Commensalism
Fundamental Niche - the full potential range of
conditions and resources it could theoretically use if
there were no competition from other species. niches
of a species overlap with those of other species.
Realized Niche - that part of a fundamental niche that
an organism occupies.
INTERSPECIFIC COMPETITION = niches of two different species
overlaps
Migrate
Shifts its feeding habits
One of the species suffers population
decline (even to extinction)
If the niches of two species overlap
completely or significantly – how
long can they both last?
What’s an organism to do?
Remember: Move, adapt, or die?
Avoid or weaken competition by:
Symbiosis
Resource partitioning
 Have broad ranges
 Live in a variety of places, eat a spectrum of foods, &
tolerate a wide range of environmental conditions
 Have narrow ranges
 Live in one type of habitat, rely on one type of food
source, or have limited range of environmental
tolerance
 Are typically endangered species