Ecosystem Dynamics and Energy Flow

The video tutorial on GED Mastery covers ecosystems, focusing on key concepts like carrying capacity, energy transfer, and trophic levels. It explains population growth, energy pyramids, and the impact of environmental changes on ecosystems. The tutorial also includes practical examples and questions to help understand these concepts, such as calculating energy transfer between trophic levels and identifying roles in food webs.

What is the maximum number of organisms that an ecosystem can support called?

• Population limit

• Energy pyramid

• Trophic level

• Carrying capacity

At what point in a population growth graph is the growth rate the fastest?

• At the end

• At the point of maximum growth

• At the carrying capacity

• At the beginning

Which trophic level contains the most energy?

• Tertiary consumers

• Secondary consumers

• Producers

• Primary consumers

What is the role of producers in an ecosystem?

• They produce their own food

• They consume primary consumers

• They decompose organic matter

• They are at the top of the food chain

How much energy is typically transferred from one trophic level to the next?

• 100%

• 10%

• 50%

• 25%

In a food chain, which organism is the primary consumer if algae is the producer?

• Fox

• Bald eagle

• Mayfly

• Salmon

If there are 10,000 joules in the producer level, how many joules are available to the secondary consumer?

• 10,000 joules

• 1,000 joules

• 10 joules

• 100 joules

What event would cause the greatest change in an ecosystem?

• Decreased hunting of foxes

• Increased hunting of foxes

• Spraying of insecticide

• Long-term drought affecting grasses

Which factor could increase the carrying capacity of an ecosystem?

• Food scarcity

• Increased predators

• Increased habitat space

• More severe winters

In a food web, which organism is a tertiary consumer?

• Grass

• Hawk

• Beetle

• Mouse