Sustaining Terrestrial Biodiversity:
The Ecosystem Approach
Chapter 10
,Core Case Study: Reintroducing
Gray Wolves to Yellowstone
Around 1800
1850–1900: decline due to human activity
U.S. Endangered Species Act: 1973
1995–1996: relocation of gray wolves to
Yellowstone Park
2008: Gray wolf no longer protected
,10-1 What Are the Major Threats
to Forest Ecosystems? (1)
Concept 10-1A Forest ecosystems provide
ecological services far greater in value than the
value of raw materials obtained from forests.
Concept 10-1B Unsustainable cutting and
burning of forests, along with diseases and
insects, are the chief threats to forest
ecosystems.
, 10-1 What Are the Major Threats
to Forest Ecosystems? (2)
Concept 10-1C Tropical deforestation is a
potentially catastrophic problem because of the
vital ecological services at risk, the high rate of
tropical deforestation, and its growing
contribution to global warming.
The Ecosystem Approach
Chapter 10
,Core Case Study: Reintroducing
Gray Wolves to Yellowstone
Around 1800
1850–1900: decline due to human activity
U.S. Endangered Species Act: 1973
1995–1996: relocation of gray wolves to
Yellowstone Park
2008: Gray wolf no longer protected
,10-1 What Are the Major Threats
to Forest Ecosystems? (1)
Concept 10-1A Forest ecosystems provide
ecological services far greater in value than the
value of raw materials obtained from forests.
Concept 10-1B Unsustainable cutting and
burning of forests, along with diseases and
insects, are the chief threats to forest
ecosystems.
, 10-1 What Are the Major Threats
to Forest Ecosystems? (2)
Concept 10-1C Tropical deforestation is a
potentially catastrophic problem because of the
vital ecological services at risk, the high rate of
tropical deforestation, and its growing
contribution to global warming.
