Concepts | Questions | Media Resources |
50.1 Conservation Biology and Biodiversity
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- Conservation biology addresses a crisis - the loss of biodiversity.
- Conservation biology is an applied, goal-orientated, multidisciplinary field.
- Extinction rates have risen to many times their natural levels and many types of ecosystems are disappearing.
- Biodiversity includes species diversity, genetic diversity, community diversity and landscape diversity in marine, freshwater, and terrestrial habitats.
| - What is a primary goal of conservation biology?
Answer - What are four types of diversity on earth and what is the description of each?
Answer - Areas with very large concentrations of species are called ___________________.
Answer
| Essential Study Partner
Summaries of major points- Conservation biology
- Biodiversity
- Distribution of diversity
Art Review
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50.2 Value of biodiversity
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- Biodiversity has both direct and indirect value.
| - In what ways can biodiversity be of direct value to humans?
Answer - What are the indirect functions of ecosystems that are beneficial to humans?
Answer
| Summaries of major points- To reverse trend toward species extinction...
- Medicinal value
- Agricultural value
- Consumptive use value
- Indirect value
- Biodiversity and natural ecosystems
Art Review
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50.3 Causes of extinction
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- Habitat loss, introduction of alien species, pollution, overexploitation and disease are now largely responsible for the loss of biodiversity.
- Global warming will shift the optimal range of many species northward and disrupt many coastal ecosystems.
| - What is the greatest cause of extinction in the United States?
Answer - What are alien (exotic) species?
Answer - What are the major pollutions that are contributing to extinction?
Answer
| Essential Study Partner
Summaries of major points- Identifying causes
- Habitat loss
- Alien species
- Pollution
- Global warming
- Overexploitation
Art Review
Art Quizzes
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50.4 Conservation techniques
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- Because of fragmented habitats, it is often necessary to conserve subdivided populations today.
- Identifying and conserving biodiversity hotspots and/or keystone species can save many other species.
- Computer analyses can be done to select areas for preservation and to determine the minimal population size needed for survival.
- Landscape preservation often involves restoration of habitats today.
| - A large population that has been subdivided into several small, isolated populations by habitat fragmentation is called a __________________.
Answer - What is gap analysis?
Answer
| Summaries of major points- Habitat preservation
- Metapopulations
- Landscape dynamics
- The edge effect
- Computer analyses
- Habitat restoration
Art Review
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