Ecological Concepts and Environmental Impact

The video provides a comprehensive review of key topics for the APES 2022 exam, including the carbon and nitrogen cycles, biodiversity, ecosystem services, population dynamics, soil properties, agricultural practices, and the El Nino and La Nina phenomena. It also discusses the environmental impact of meat production. The video emphasizes the importance of understanding these concepts for the exam and offers resources and strategies for effective study.

What is the primary purpose of the live stream mentioned in the introduction?

• To promote a streaming service

• To review APES Units 6-9

• To prepare students for the APES 2022 exam

• To discuss the history of APES exams

In the carbon cycle, what is a carbon sink?

• A reservoir that stores carbon for long periods

• A type of plant that absorbs carbon dioxide

• A process that releases carbon dioxide into the atmosphere

• A method of converting carbon dioxide into oxygen

What is the role of nitrogen-fixing bacteria in the nitrogen cycle?

• They store nitrogen in plant roots

• They decompose organic matter into nitrogen

• They release nitrogen gas back into the atmosphere

• They convert nitrogen gas into a form usable by plants

Why is genetic diversity important for a population's survival?

• It prevents any form of mutation

• It increases the population's ability to adapt to environmental changes

• It ensures that all individuals are identical

• It reduces the need for natural selection

What is a characteristic of a generalist species?

• Has a narrow ecological niche

• Less adaptable to new environments

• Requires a specific food resource

• More likely to become invasive

Which type of survivorship curve is associated with k-selected species?

• Type IV

• Type III

• Type II

• Type I

What does a wide base in a population pyramid indicate?

• High death rate

• Declining population

• High birth rate

• Stable population

What causes the counterclockwise rotation of hurricanes in the Southern Hemisphere?

• The Coriolis effect

• The Walker circulation

• The trade winds

• The thermocline

During an El Nino year, what happens to the eastern trade winds?

• They remain the same

• They blow from west to east

• They weaken or reverse

• They become stronger

What is one major environmental impact of clear-cutting?

• Increased biodiversity

• Soil erosion

• Improved air quality

• Increased water retention