and Population Control
Chapter 5
,Core Case Study: Southern Sea Otters: Are
They Back from the Brink of Extinction?
Habitat
Hunted: early 1900s
Partial recovery
Why care about sea otters?
• Ethics
• Keystone species
• Tourism dollars
,5-1 How Do Species Interact?
Concept 5-1 Five types of species
interactions—competition, predation, parasitism,
mutualism, and commensalism—affect the
resource use and population sizes of the
species in an ecosystem.
, Species Interact in Five Major Ways
Interspecific Competition
Predation
Parasitism
Mutualism
Commensalism