Biodiversity and Solar Energy Effects

The video explores why species diversity is highest near the equator and decreases towards the poles. It introduces climatic zones and explains the latitudinal gradient in diversity. The video discusses three main hypotheses for high biodiversity in the tropics: the age and stability of the tropics, niche specialization, and higher solar energy leading to increased productivity. Examples from different regions illustrate these concepts.

What is the general trend of species diversity as one moves from the equator towards the poles?

• It fluctuates randomly.

• It remains constant.

• It decreases.

• It increases.

Why might the large area of the tropics contribute to higher biodiversity?

• Larger areas have fewer predators.

• Larger areas have more rainfall.

• Tropical areas have more sunlight.

• More area means more resources and habitats.

Which country has the highest number of bird species according to the video?

• New York

• Colombia

• Greenland

• India

What is the term used to describe the decrease in species diversity from the equator to the poles?

• Longitudinal gradient

• Equatorial gradient

• Latitudinal gradient

• Polar gradient

What is one reason the tropics are considered 'older' than temperate areas?

• They have more sunlight.

• They have been more stable over time.

• They have more rainfall.

• They have more ancient species.

How does niche specialization contribute to biodiversity in the tropics?

• It allows species to adapt to changing environments.

• It enables species to specialize in stable conditions.

• It increases the number of predators.

• It reduces competition among species.

Why is niche specialization less common in polar regions?

• The environment is too stable.

• There is too much competition.

• The environment is constantly changing.

• There is too much sunlight.

How does higher solar energy in the tropics affect biodiversity?

• It increases productivity and speciation.

• It has no effect on biodiversity.

• It decreases the growth rate of species.

• It reduces the number of species.

What is one effect of higher productivity in the tropics?

• Slower growth of plants and animals.

• Faster growth and more generations.

• Decreased speciation.

• Fewer generations of species.

Which hypothesis suggests that the position of the Earth and Sun affects biodiversity?

• Niche specialization hypothesis

• Solar energy hypothesis

• Age hypothesis

• Stability hypothesis