Ecosystem Dynamics and Organism Survival

The video discusses ecosystems, focusing on how changes like droughts affect them. It explains energy flow through food webs, highlighting the role of producers, herbivores, and omnivores. The impact of droughts is examined, showing how they lead to the death or migration of organisms. Adaptation strategies for survival are also covered.

What happens to an ecosystem if a producer dies in a closed environment?

• The ecosystem thrives

• The ecosystem becomes more diverse

• The ecosystem remains unchanged

• The ecosystem eventually collapses

In a river ecosystem, what is the primary source of energy for producers?

• Air

• Water

• Sunlight

• Soil

Which organism in the river ecosystem is an omnivore?

• Deer

• Salmon

• Bear

• Berry bush

What are two essential conditions for producers to survive?

• Cold temperatures and wind

• Shade and dry soil

• Water and air

• Sunlight and nutrient-rich soil

What role do decomposers play in the ecosystem?

• They consume producers

• They block sunlight

• They enrich the soil with nutrients

• They provide light

What is a drought?

• A sudden increase in temperature

• A long period without rainfall

• A period of excessive rainfall

• A decrease in sunlight

What happens to fish in a river ecosystem during a drought?

• They thrive

• They die due to lack of water

• They adapt to live on land

• They migrate to another river

What are the two options for organisms when faced with a drastic change in their ecosystem?

• Adapt or die

• Reproduce or perish

• Move or die

• Hibernate or migrate

Which organisms are more likely to survive a drastic change by moving?

• Large mammals like bears

• Small insects

• Stationary trees

• Aquatic plants

What is the fate of organisms that cannot move long distances during a drastic change?

• They adapt quickly

• They thrive

• They become predators

• They die out