Ecology of Species Interactions 1 — Questions and Answers
Question 1: What is community ecology primarily concerned with?
- The study of energy flow in ecosystems
- The study of individual organism adaptations
- The interactions between different species in a shared environment (Correct answer)
- The genetic diversity within a single species
Correct answer: The interactions between different species in a shared environment
Community ecology primarily focuses on the interactions between different species that coexist in a shared geographical area. This field examines how these interactions, such as predation, competition, mutualism, and commensalism, influence the structure, organization, and diversity of ecological communities. It seeks to understand the complex web of life within an ecosystem.
Question 2: What is the term for a relationship where both species benefit from the interaction?
- Parasitism
- Mutualism (Correct answer)
- Commensalism
- Competition
Correct answer: Mutualism
Mutualism is a type of symbiotic relationship where both interacting species benefit from the association. This reciprocal benefit can involve various resources or services, such as nutrient exchange, protection, or pollination. This interaction is crucial for the survival and ecological success of the involved species, often leading to co-evolutionary adaptations.
Question 3: Which of the following is an example of competitive exclusion?
- Two bird species sharing the same tree but feeding on different insects
- Two species of fish competing for the same food source, leading one to become extinct (Correct answer)
- A predator capturing prey from different species
- Two species of plants living in the same area but in different soil types
Correct answer: Two species of fish competing for the same food source, leading one to become extinct
Competitive exclusion occurs when two species compete for the same resources, and one species outcompetes the other, causing it to be driven to extinction in that environment.
Question 4: What is the role of a keystone species in a community?
- It serves as a primary producer, forming the base of the food web
- It has a disproportionately large effect on its environment relative to its abundance (Correct answer)
- It provides shelter for other species in the community
- It is the most numerous species in the community
Correct answer: It has a disproportionately large effect on its environment relative to its abundance
Keystone species play a critical role in maintaining the structure of an ecosystem or community, despite not always being the most abundant species. Their loss can lead to significant changes in the community structure.
Question 5: What is an example of herbivory in community ecology?
- A lion hunting a zebra
- A cow eating grass (Correct answer)
- A bird cleaning parasites off a buffalo
- Two trees competing for sunlight
Correct answer: A cow eating grass
Herbivory refers to the interaction where an organism feeds on plants. In this case, the cow eating grass is a classic example of herbivory.
Ecology of Species Interactions 1
What is community ecology primarily concerned with?