Ecosystem Dynamics: Interactions of Biotic and Abiotic Factors

The video explores the components of ecosystems, focusing on abiotic and biotic factors. Biotic factors include living organisms and their interactions, while abiotic factors encompass physical and chemical elements like sunlight and water. The video explains how these factors interact to define ecosystems, using examples like algae blooms and oak trees to illustrate these concepts.

What are the two main components that make up an ecosystem?

• Rocks and soil

• Water and sunlight

• Plants and animals

• Biotic and abiotic factors

Which of the following is considered a biotic factor?

• A rabbit

• Temperature

• pH of soil

• Sunlight

What is an example of a product of a biotic factor?

• Wind

• Rain

• Sunlight

• Honey

Which of the following is NOT an abiotic factor?

• Fish

• Sunlight

• pH of water

• Temperature

How can abiotic factors influence an ecosystem?

• By providing food for animals

• By changing the color of plants

• By limiting or enhancing the growth of biotic elements

• By creating new species

What happens when phosphates are added to water bodies?

• The water becomes clearer

• Fish population decreases

• Algae growth is limited

• An algae bloom occurs

In the example of the oak tree, what abiotic resource is it competing for?

• Water

• Sunlight

• Space

• Nutrients

What process allows plants to convert sunlight into energy?

• Fermentation

• Respiration

• Photosynthesis

• Transpiration

What role does fungus play in the interaction with the oak tree?

• It provides nutrients to the tree

• It competes for sunlight

• It helps the tree grow faster

• It steals glucose from the tree

What happens to the molecules of leaves once they decompose?

• They remain biotic

• They become abiotic

• They disappear

• They turn into new leaves