Biodiversity and Ecosystem Concepts

This video introduces biodiversity, explaining its types: genetic, species, and habitat diversity. It highlights the importance of genetic diversity in species survival, species richness and evenness, and the role of habitat diversity in ecosystem stability. The video also discusses global biodiversity hotspots, emphasizing the need to conserve areas with high endemic species due to their vulnerability to human activities.

Why is genetic diversity important for species like gray squirrels?

• It makes them more visible to predators.

• It helps them adapt to environmental changes.

• It reduces their need for food.

• It increases their population size.

What is the primary benefit of genetic diversity in agriculture?

• It reduces the need for water.

• It helps in developing disease-resistant varieties.

• It speeds up the growth of plants.

• It increases the size of fruits.

How is species richness defined?

• The number of different species in an area.

• The number of individuals in a species.

• The genetic variation within a species.

• The variety of habitats in an ecosystem.

What does species evenness refer to?

• The number of habitats in an ecosystem.

• The total number of species in an ecosystem.

• The equal distribution of individuals among species.

• The genetic diversity within a species.

Why are complex ecosystems more stable?

• They have fewer species.

• They are isolated from human activities.

• They rely on a single food source.

• They have multiple pathways for energy flow.

What is a characteristic of a tundra ecosystem?

• High species diversity.

• Complex food webs.

• Large niches for species.

• Abundant plant life.

Where is biodiversity most commonly found on Earth?

• Polar regions

• Mountain tops

• Deserts

• Tropical regions

What is an endemic species?

• A species that is extinct.

• A species that only exists in one specific area.

• A species that migrates seasonally.

• A species found worldwide.

Why are biodiversity hotspots important to preserve?

• They have a high number of endemic species.

• They are easy to access.

• They have low genetic diversity.

• They are located in urban areas.

What factor contributes to high biodiversity in tropical regions?

• Low temperatures

• High levels of insulation

• Sparse vegetation

• Limited water supply