Ecological Niches and Their Roles in Environmental Balance

Mr. Anderson discusses the concept of ecological niches, explaining different pronunciations and definitions. He introduces George Hutchinson's idea of an n-dimensional hypervolume to describe niches. The video covers the difference between fundamental and realized niches, using examples of lichens. It also explains the competitive exclusion principle, illustrated by the interactions between wolves, coyotes, and foxes in Yellowstone Park.

What is the primary role of a niche in an environment?

• To determine the lifespan of a species

• To define the role or job of a species

• To calculate the population of a species

• To measure the size of a species

What is a niche according to George Hutchinson?

• A two-dimensional space

• A specific food source

• An n-dimensional hyper volume

• A single species habitat

What does the term 'n-dimensional hyper volume' refer to?

• A two-dimensional area

• A habitat with no competition

• A complex space defined by multiple factors

• A single factor affecting a species

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

• A realized niche is the potential space a species could occupy

• A fundamental niche is the actual space a species occupies

• A realized niche is where a species could live without competition

• A fundamental niche is larger than a realized niche

What does the competitive exclusion principle state?

• Niches are not affected by competition

• Species can adapt to any niche

• Complete competitors cannot coexist

• Two species can share the same niche indefinitely

How does the competitive exclusion principle apply to factory workers?

• Each worker has a specific role, similar to species in an ecosystem

• Workers can perform any job they choose

• All workers share the same responsibilities

• Workers compete for the same job

What happened to the coyote population when gray wolves were reintroduced to Yellowstone?

• The coyote population decreased

• The coyote population remained stable

• The coyote population increased

• The coyote population was unaffected

What was the impact on the red fox population after the reintroduction of gray wolves?

• The red fox population was eliminated

• The red fox population remained the same

• The red fox population increased

• The red fox population decreased

Why did the gray wolves target coyotes in Yellowstone?

• Coyotes were a threat to wolves

• Coyotes were easier to hunt

• Coyotes were competing for the same food source

• Coyotes were overpopulated

What adaptation have coyotes shown in response to the presence of gray wolves?

• They have started living in packs

• They have become smaller

• They have migrated out of Yellowstone

• They have become larger and stay near roads