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Questions and Answers
What is a possible ecological role of species A in its environment?
What is a possible ecological role of species A in its environment?
- It competes with species B for temperature regulation.
- It creates a habitat that allows for diverse species interactions.
- It contributes to the oxygen levels in its habitat.
- It potentially influences the cell wall temperature of woody tissues. (correct)
What does the temperature range signify for species B?
What does the temperature range signify for species B?
- It limits its ability to utilize available resources.
- It shows a narrow adaptation to specific environmental conditions. (correct)
- It allows for wider competition with other species.
- It indicates the species can thrive in colder environments.
How does the presence of species B affect the competition dynamics in its habitat?
How does the presence of species B affect the competition dynamics in its habitat?
- It suggests species B has developed traits to avoid competition. (correct)
- It decreases the available habitat for species A.
- It leads to the extinction of weaker species in the area.
- It increases competition for food resources.
What does the statement regarding environmental conditions imply about species A?
What does the statement regarding environmental conditions imply about species A?
What conclusion can be made regarding the resource utilization of species A and B?
What conclusion can be made regarding the resource utilization of species A and B?
In what environment does species B prefer to exist?
In what environment does species B prefer to exist?
What is indicated about the habitat of species A?
What is indicated about the habitat of species A?
What trait has species B developed that aids in its survival?
What trait has species B developed that aids in its survival?
What are the names of the two species of gastric-brooding frogs mentioned?
What are the names of the two species of gastric-brooding frogs mentioned?
In what year did the Pyrenean ibex become extinct?
In what year did the Pyrenean ibex become extinct?
What is the primary cause hypothesized for the Big Five mass extinctions?
What is the primary cause hypothesized for the Big Five mass extinctions?
What percentage of species is thought to have been killed by the Big Five mass extinctions?
What percentage of species is thought to have been killed by the Big Five mass extinctions?
What has been observed about modern extinction rates?
What has been observed about modern extinction rates?
Which factor does NOT contribute to the characterization of mass extinctions?
Which factor does NOT contribute to the characterization of mass extinctions?
When were the gastric-brooding frogs discovered?
When were the gastric-brooding frogs discovered?
What role did hunting and competition from domestic animals play in the extinction of the Pyrenean ibex?
What role did hunting and competition from domestic animals play in the extinction of the Pyrenean ibex?
What percentage of the decreasing species are still classified as 'low concern'?
What percentage of the decreasing species are still classified as 'low concern'?
Which of the following species is mentioned as decreasing in the content?
Which of the following species is mentioned as decreasing in the content?
Loss of biodiversity primarily affects what aspect of species?
Loss of biodiversity primarily affects what aspect of species?
What common outcome is expected due to biodiversity loss?
What common outcome is expected due to biodiversity loss?
How many kilometers of birds are referenced in the content?
How many kilometers of birds are referenced in the content?
Which of the following gibbons is specifically mentioned as being endangered?
Which of the following gibbons is specifically mentioned as being endangered?
What best describes 'decreasing common species' in the content?
What best describes 'decreasing common species' in the content?
Which of the following statements is false regarding biodiversity loss?
Which of the following statements is false regarding biodiversity loss?
What concept helps explain why different species can coexist without competing for the same resources?
What concept helps explain why different species can coexist without competing for the same resources?
In what way do hawks and owls demonstrate resource differentiation?
In what way do hawks and owls demonstrate resource differentiation?
Which of the following statements about symbiotic relationships is true?
Which of the following statements about symbiotic relationships is true?
What is a primary benefit of having all necessary resources in a habitat?
What is a primary benefit of having all necessary resources in a habitat?
What ecological strategy allows hawks and owls to exist without direct competition?
What ecological strategy allows hawks and owls to exist without direct competition?
What happens to a species that faces intense competition for its specific role in an ecosystem?
What happens to a species that faces intense competition for its specific role in an ecosystem?
Which of the following statements is true regarding a species' role within its ecosystem?
Which of the following statements is true regarding a species' role within its ecosystem?
What can occur to a species if it cannot adapt to competition?
What can occur to a species if it cannot adapt to competition?
How does natural selection influence a species competing for its ecosystem role?
How does natural selection influence a species competing for its ecosystem role?
What role does migration play for a species in an ecosystem?
What role does migration play for a species in an ecosystem?
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Study Notes
Ecological Niche
- A species' role in its ecosystem
- Not to be confused with its habitat
- Species with similar requirements compete for resources
- Through evolution, species develop traits to avoid competition
- Examples: Hawks & owls have different hunting times; flatworms have different temperature ranges
Habitat Complexity
- Enables species coexistence
- Allows for complete resource use
- Example: Gastric-brooding frogs lived in a small area in Australia
- Extinct due to habitat loss
Mass Extinctions
- Characterized by high extinction rates and long-lasting ecosystem change
- The "Big Five" mass extinctions killed over 75% of species
- Triggers include glaciation, volcanism and asteroid impact
Sixth Mass Extinction?
- Modern extinction rates are exceptionally high and unprecedented
- Suggest a mass extinction underway
- This is exacerbated by the loss of biodiversity
- Example: The Hainan gibbon is critically endangered, the barn swallow is decreasing due to habitat loss
- Ranges of species are shrinking, leading to a loss of individuals and biodiversity
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