Download Species Relationship Notes

Why is there an annual flux in
the graph?
Agenda for
1.Species
relationships
Symbiotic relationships
• Symbiosis
– Mutualism (+ +)
– Commensalism (+ 0)
– Antagonism (+ -)
• Parasitism
• Predation
• Competition
– Amensalism (- 0)
Predation
• One individual (predator) captures, kills,
and consumes another individual (prey)
Common Defenses Against Predation
• Flight
• Mimicry
• Camouflage
• Chemicals/Physical Structures
• Bright Colors
Competition
• Niche Overlap - use of same limited resources
by two species
– Too many organisms in an area
– Water during a drought
– Overpopulation
• One organism better uses a resource leaving
less for other species
Mutualism
• Both species benefit
– Pollination
Parasitism
• One individual is
harmed and one
benefits
• Parasite feeds on the
host
– No immediate death
Commensalism
• One species benefits and the other is not
affected
Ammensalism
• one species is harmed or inhibited and the
other species is unaffected
– shading out of one plant by a taller and wider one
– the inhibition of one plant by the secretions of
another
Species Interactions
Symbiotic Relationship Species 1
+
Mutualism
Benefits
+
Commensalism
Benefits
Species 2
+
Benefits
0
Neutral
Antagonism (Parasitism
+
& predations)
Benefits
Harmed
Harmed
0
Neutral
Ammensalism
What is happening in the graph?
Agenda for Thursday Oct 4th
1. Finish lab
2. Review Stuff
TEST TOMORROW