2nd Year - Food Chains And Webs Flashcards
What is the source of energy for most ecosystems?
Radiation from the sun
What do food chains show?
They show which organisms eat other organisms
What do food chains always begin with?
They begin with green plants (producers) which provide food for other organisms (consumers)
What are the trophic levels?
Producer, primary consumer, secondary consumer, tertiary consumer, quaternary consumer and idea of top carnivore
How is energy lost at each stage in the food chain?
Because the organisms are using some of the energy they get to survive. Energy is lost from food chains/webs because the organisms need to: move.
What is bioaccumualation?
Non-biodegradable toxic materials accumulating in food chains
Who has the highest levels of bioaccumulation in their tissue?
The top carnivore
What are food chains interconnected to form?
Food chains are often interconnected to form food webs
What are predators?
Animals that naturally prey on others.
What are prey?
Animals that are hunted and killed by others for food.
How do predators and preys populations affect one another?
If the prey population in an ecosystem grows, predator numbers will respond to the increased food supply by increasing as well.
