Lesson 6: Sustaining Biodiversity

Question 1

Biodiversity Defined is

Answer 1

Speciation - Extinction

Question 2

When does Highest Biodiversity occur?

Answer 2

When there is enough
disturbance to prevent the dominant
competitors from taking over, but not so much
that the community is unable to develop.

Question 3

Greatest Threat to Species is HIPPO which means?

Answer 3

Habitat destruction
Invasive species
Population (humans) growth
Pollution
Over-harvesting

Question 4

How many percent of our Virgin forests are intact?

Answer 4

5%

Question 5

How many grasslands are native?

Answer 5

2%

Question 6

How many percent of redwood trees are old growth?

Answer 6

15%

Question 7

How many percent of wetlands remain?

Answer 7

<50%

Question 8

The Importance of Biodiversity

Answer 8

Intrinsic Value
Existence Value
Aesthetic Value
Bequest Value

Question 9

What is intrinsic value?

Answer 9

right to exist, to have evolved means they have important roles

Question 10

What is instrumental value?

Answer 10

because of their use to humans

Question 11

What is existence value?

Answer 11

knowing it exists

Question 12

What is aesthetic value?

Answer 12

wildlife viewing

Question 13

What is bequest value?

Answer 13

value of biodiversity for the future generations

Question 14

What is the species approach to protecting biodiversity

Answer 14

Identify endangered species and protect their habitats, this is through legal protection, habitat management, propagation of endangered species in captivity, reintroduction of species into habitat

Question 15

What is the ecosystems approach to protecting biodiversity?

Answer 15

Preserve sufficient areas of the habitats in different biomes and aquatic systems. this can be done through the protection of areas through government purchases, eliminate or reduce nonnative species, management of protected areas and the restoration of degraded areas

Question 16

Types of US Public Lands

Answer 16

Multiple-Use Lands
Moderately Restricted Lands
Restricted-Use Lands

Question 17

Sustainable forestry

Answer 17

Longer Rotations in between Logging
Selective Logging
Crop Harvesting
Leave snags and logs for resting animals

Question 18

Causes of Deforestation

Answer 18

• Population growth
• Poverty
• Environmentally harmful government
  subsidies (encourage poor to colonize
  tropical forests)
• Debts owed to developed countries
• Low value of ecological services

Question 19

National Parks Management

Answer 19

• Inadequate protection
• Often too small to sustain biodiversity
• Invasions by nonnative species
• Too many human visitors
• Traffic jams and air pollution
• Better pay for park staff

Question 20

Establishment of National Parks

Answer 20

• Include moderate to large tracts of land
• Involve government, private sector and
  citizens
• Biosphere reserves
• Adaptive ecosystem management
• Protect most important areas “hot spots”
• Wilderness areas