Dispersion Patterns and Species Range

The video discusses the range and distribution patterns of species, emphasizing that species range is dynamic and influenced by various factors such as environmental changes and interactions with other species. The grizzly bear's range in North America is used as an example of how human activity has altered species distribution. The video also explains three dispersion patterns: uniform, clumped, and random, with examples like penguins, wolves, and dandelions, highlighting how resource availability and competition affect these patterns.

What is a species range?

• The lifespan of a species

• The genetic diversity within a species

• The number of species in a given area

• The area where a species can be found

Which factor is NOT mentioned as influencing species range?

• Genetic mutations

• Abundance of food

• Interactions with other species

• Climate change

Where were grizzly bears historically found before European settlers arrived?

• Only in the Rockies

• From Mexico to the Mississippi

• Only in Canada

• Only in Yellowstone National Park

What is the current status of grizzly bears in Mexico?

• Extinct

• Thriving

• Protected

• Endangered

Which of the following is a factor that affects dispersion patterns?

• Species' lifespan

• Species' size

• Distribution of resources

• Color of the species

What is a characteristic of uniform dispersion patterns?

• Organisms are randomly distributed

• Organisms are evenly spaced

• Organisms are found only in specific areas

• Organisms form large groups

Which animal is used as an example of uniform dispersion?

• Wolves

• Dandelions

• Penguins

• Bats

What is a common reason for clumped dispersion?

• Safety in numbers

• Lack of predators

• Territorial behavior

• Even distribution of resources

Which plant is mentioned as an example of random dispersion?

• Roses

• Dandelions

• Sunflowers

• Cacti

What condition is necessary for random dispersion to occur?

• High competition for resources

• Abundant and evenly distributed resources

• Presence of many predators

• Limited space