Species Interactions and Niches

The video tutorial on community ecology covers the hierarchical levels of ecology, from individual organisms to the biosphere. It explains interspecific interactions, including competition, predation, and symbiosis, and introduces the competitive exclusion principle. The concept of ecological niches is explored, highlighting resource partitioning and the differentiation of niches. The tutorial also discusses character displacement, illustrating how species adapt to coexist in shared environments.

What is the term for a group of individuals of the same species living in a specific area?

• Biome

• Ecosystem

• Population

• Community

Which of the following is NOT a type of interspecific interaction?

• Photosynthesis

• Symbiosis

• Predation

• Competition

In interspecific competition, what is the typical outcome for the species involved?

• Both species benefit

• Neither species is affected

• One species benefits, the other is harmed

• Both species are harmed

What does the competitive exclusion principle state?

• Two species competing for the same resource cannot coexist

• Species always evolve to avoid competition

• Competition leads to mutual benefits

• Two species can coexist if they share the same niche

What is an ecological niche?

• The time a species is active

• The food a species eats

• The role a species plays in its environment

• The physical space a species occupies

How does resource partitioning help similar species coexist?

• By increasing competition

• By reducing competition through niche differentiation

• By sharing resources equally

• By eliminating weaker species

What is the difference between a fundamental niche and a realized niche?

• A realized niche is larger than a fundamental niche

• A realized niche is the potential range of conditions a species can tolerate

• A fundamental niche is smaller than a realized niche

• A fundamental niche is the potential range without competition, while a realized niche is the actual range with competition

What is character displacement?

• The sharing of resources between species

• The extinction of one species due to competition

• The tendency for species to evolve different traits when living together

• The process of species becoming more similar over time

In character displacement, what happens to species that do not evolve different traits?

• They merge into a single species

• They become extinct or are outcompeted

• They thrive and increase in number

• They migrate to a new area

What is the outcome when two species with similar needs live in different areas?

• They become extinct

• They maintain similar traits

• They develop character displacement

• They evolve to become identical