Energy Flow and Ecosystem Dynamics

The video provides a review for an ecology test, covering topics such as the energy pyramid, invasive species, symbiotic relationships, biotic and abiotic factors, and predator-prey dynamics. It explains the roles of producers, consumers, and decomposers in ecosystems, the impact of invasive species like Kudzu and lionfish, and the types of symbiotic relationships. The video also discusses the influence of biotic and abiotic factors on ecosystems and illustrates predator-prey dynamics through graphs and food webs.

What is the primary source of energy for producers in an ecosystem?

• The Moon

• The Sun

• Chemical reactions

• Other organisms

Which type of consumer is known for having sharp teeth adapted for eating other animals?

• Primary consumers

• Producers

• Secondary consumers

• Decomposers

Why are invasive species like Kudzu problematic for ecosystems?

• They have natural predators

• They grow uncontrollably and outcompete native species

• They provide food for native species

• They improve biodiversity

What is a characteristic of mutualistic relationships?

• Both species are harmed

• One species benefits, the other is unaffected

• Both species benefit

• One species is harmed, the other benefits

In a commensal relationship, what happens to the host species?

• It becomes a parasite

• It is unaffected

• It benefits

• It is harmed

Which of the following is a biotic factor in an ecosystem?

• Temperature

• Water

• Rocks

• Shrimp

What is an example of an abiotic factor?

• Plants

• Birds

• Insects

• Air temperature

In a predator-prey graph, what typically happens to the predator population after the prey population decreases?

• It becomes extinct

• It decreases

• It remains constant

• It increases

What role do decomposers play in a food web?

• They are apex predators

• They break down dead material

• They produce energy from sunlight

• They consume primary consumers

If a disease reduces the rabbit population in a food web, what is likely to happen to the shrub population?

• It will become extinct

• It will decrease

• It will increase

• It will remain the same