Transcript 2010: Ecology notes from Tuesday 3-9

Ecology
Overview!
Bioaccumulation and
Biomagnification
• Bioaccumulation- how
pollutants enter a food chain
• Biomagnification- pollutants
tend to concentrate as they
move from one trophic level to
the next.
You’ve found your niche!
•
Ecological niche-
the role and position
a species has in its environment
– Habitat- where an organism lives
•
No two species can occupy the same
ecological niche at the same time if resources
are limiting…
Relationships
• Symbiosis: is a close ecological
relationship between the individuals of two
(or more) different species
• Mutalism: both species benefit
• Commensalism: one benefits, one
unaffected
• Parasitism: one benefits, one harmed
• Competition: no one benefits