Ecosystem Roles and Interactions

The video tutorial discusses the interactions of organisms within their environments, focusing on biotic and abiotic factors. It explains the concept of brackish water and salinity, and how these affect organism survival. The tutorial includes learning tasks that explore energy flow in ecosystems, interactions in intertidal zones, and the roles of different organisms. It concludes with a task to create a model of an ecological pyramid, illustrating the arrangement of producers, consumers, scavengers, and decomposers.

What are the two main types of factors that interact in an ecosystem?

• Chemical and physical factors

• Biotic and abiotic factors

• Living and non-living factors

• Organic and inorganic factors

What is the term used to describe the measure of salt in water?

• Viscosity

• Conductivity

• Density

• Salinity

In a food chain, which organism is likely to be eaten by small fish, shrimp, and mussels?

• Coral

• Seaweed

• Algae

• Plankton

What happens to intertidal zones during high tides?

• They dry up completely

• They are exposed to sunlight

• They are covered with water

• They become rocky

Which organism is a producer in an ecosystem?

• Sea urchin

• Fish

• Crab

• Algae

Which of the following is a consumer in an ecosystem?

• Cyanobacteria

• Green crab

• Phytoplankton

• Salt marsh grass

What role do decomposers play in an ecosystem?

• Consume other organisms

• Produce food from sunlight

• Scavenge for leftovers

• Break down remains into simpler materials

Which organism is an example of a scavenger?

• Marine snails

• Diatoms

• Fungi

• Bacteria

What is the primary source of energy for producers?

• Organic matter

• Sunlight

• Water

• Minerals

Which of the following is NOT a role of organisms in an ecosystem?

• Producers

• Consumers

• Decomposers

• Manufacturers