Download Symbiosis

SNC1D:
Populations & Community Interactions:
name: ______ date ________
Read p52 to p55. After reading all 4 pages - complete the following:
Limiting factor: Any factor that __________________________________________________________________
Examples:
1. Abiotic ___________________________________________________________________________
2. Biotic _____________________________________________________________________________
Tolerance range: The _____________ conditions within which a species can _____________
Name one species with a low range of tolerance and one with a high range of tolerance.
Give reasons for your choices.
1. Low tolerance range:
2. High tolerance range:
Symbiosis: (from Ancient Greek σύν "together" and βίωσις "living")
A close and often long-term interaction between different biological species.
Generally 2 organisms living in close contact.
Types of Symbiotic relationships:
1. Mutualism:
Both organisms benefit from the relationship.
Examples:
2. Commensalism:
Examples:
One organism benefits - the other is unaffected.
3. Parasitism:
Examples:
One organism benefits (parasite) – the other is harmed (host)
Other community interactions:
Competition: Organisms depend on the same ___________________________.

Interspecies competition: Competition between individuals of _______________ species.

Intraspecies competition: Competition between individuals of the ________________ species.
(Intra - within)
Predation: One organism (predator) eats the other (_________). Give an example of predation:
Do the following: p55 #1,2,3,8
Expectations B3
SNC1D:
Expectations B3
Populations & Community Interactions:
name: ______ date ________