Questions and Answers
What is the first component of biodiversity as described?
Why is studying species diversity often preferred in biodiversity research?
Which of the following statements is true regarding biodiversity?
What estimate is considered the realistic number of species on Earth?
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What is a possible consequence of adding or losing a species in an ecosystem?
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What is the main role of genes in determining an organism's characteristics?
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What does biogeography primarily study?
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Which factors are considered in the study of biogeography?
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What aspect of biodiversity does biogeography analyze?
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Which of the following statements about gene diversity is true?
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What is the main function of a vine in its habitat?
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Which term describes organisms that are found in many places around the world?
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What is a characteristic of endemic species?
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What does biogeography primarily study?
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What is one of the key objectives of studying biogeography?
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Study Notes
Biodiversity
- Biodiversity encompasses the variety of life on Earth and the interdependence of organisms.
- Estimated species count ranges from 1.4 million to 30 million, with a realistic estimate of about 8 million.
- The variety of life is supported by complex interactions among organisms, from microorganisms to larger animals.
Components of Biodiversity
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Ecosystem Diversity
- Includes various ecosystems such as freshwater (lakes, ponds, rivers) and marine (rocky coasts, coral reefs, estuaries).
- Example: Coral reef ecosystems hold significant biodiversity.
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Species Diversity
- Focuses on distinct species, which are easier to identify in the field.
- Each species plays a specific role in its ecosystem; inclusion or loss of a species can impact the entire system.
- Examples of species in Fiji:
- Flying fox (Pteropus tonganus)
- Fire ants (Solenopsis mandibularis)
- Fish poison (Barringtonia asiatica)
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Genetic Diversity
- Comprises variations in genes, which dictate organism development and traits.
- Example of genetic variation among birds:
- Collared lory (Phigys solitarious)
- Common myna (Acridotheres tristis)
- Fiji parrotfinch (Erythrura pealii)
Biogeography
- Studies the relationship between ecosystems and lifeforms, influenced by Earth's energy and chemical resources.
- Explores changes in biodiversity distribution over time and the factors affecting these distributions.
- Investigates why specific ecosystems or taxa are located in particular areas, factoring in range limitations and habitat types.
Ecosystem and Species Distribution
- Observes dynamic patterns of distribution and abundance in terrestrial, freshwater, and marine life.
- Differentiates between cosmopolitan species (e.g., ants, pigeons) widely distributed and endemic species (e.g., Fiji tree frog) restricted to specific locations.
Goals of Biogeography
- Aims to understand mechanisms, processes, and factors that lead to dispersal, evolution, and extinction of species.
- Seeks to promote the wise use and protection of biological resources for future generations, focusing on ecosystem services.
Additional Notes
- Important reminders include signing up for tutorials, completing assigned readings on Moodle, and starting personal assignments due on August 2.
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Description
This quiz explores the concept of biodiversity and its significance on Earth. It covers the variety of ecosystems and the complex interactions that sustain life. Test your knowledge on the diversity of species and ecosystems that inhabit our planet.
