Environmental Changes and Ecosystem Dynamics

The video covers the interdependence of living systems, focusing on ecosystems and energy flow. It reviews environmental changes, both short and long-term, and their impact on ecosystems. The video also discusses human impacts on ocean systems, such as pollution and overfishing, and highlights efforts to mitigate these effects, like artificial reefs. The importance of maintaining ecosystem balance is emphasized.

What percentage of energy is transferred from producers to primary consumers in an ecosystem?

• 100%

• 1%

• 50%

• 10%

Which organism is considered a primary consumer in a typical food chain?

• Grasshopper

• Bird

• Snake

• Owl

What type of relationship benefits both organisms involved?

• Mutualism

• Commensalism

• Parasitism

• Predation

Which of the following is an example of a short-term environmental change?

• Flood

• Urbanization

• Global Warming

• Ice Age

What is a long-term environmental change that can lead to genetic variation?

• Oil Spill

• Hurricane

• Volcanic Eruption

• Radioactive Waste

How do humans primarily obtain minerals like magnesium and salt?

• Mining

• Forestry

• Ocean Harvesting

• Agriculture

What is a major consequence of commercial overfishing?

• Enhanced coral growth

• Improved water quality

• Decreased ocean organism populations

• Increased biodiversity

What is the purpose of constructing artificial reefs?

• To increase ocean temperatures

• To promote marine life

• To extract oil

• To reduce fish populations

Which human activity contributes to ocean pollution through runoff?

• Agriculture

• Mining

• Deforestation

• Fishing

What is a potential future consequence of current commercial harvesting rates?

• Increased seafood availability

• Depletion of seafood staples

• Improved ocean health

• Stabilized fish populations