Multiple Choice
Which of the following best describes the types of soil water, and which type is considered 'available soil water' for plants?
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48. Ecology
Introduction to Ecology
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Which of the following events would decrease competition for resources in an ecosystem?
A
A drought reduces the availability of water.
B
An invasive plant species spreads rapidly.
C
A population of herbivores migrates out of the area.
D
A new predator is introduced, increasing predation pressure.
Verified step by step guidance1
Understand the concept of competition in an ecosystem: Competition occurs when organisms vie for the same limited resources, such as food, water, or shelter. A decrease in competition means fewer organisms are competing for these resources.
Analyze the first event: 'A drought reduces the availability of water.' A drought would decrease the availability of water, a critical resource, which would likely increase competition among organisms for the remaining water.
Analyze the second event: 'An invasive plant species spreads rapidly.' An invasive species often competes with native species for resources, which could increase competition rather than decrease it.
Analyze the third event: 'A population of herbivores migrates out of the area.' If herbivores leave the area, there will be fewer organisms competing for the same food resources (e.g., plants), which would decrease competition for those resources.
Analyze the fourth event: 'A new predator is introduced, increasing predation pressure.' Increased predation pressure could reduce the population of prey species, but it does not directly reduce competition for resources among the remaining organisms. Instead, it alters predator-prey dynamics.
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