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Ayana Ashok

Aug 21

Food chains & Food webs

in Ayana Ashok

#foodchains #biology

A food chain shows the transfer of energy from one organism to the next, starting with a producer

The source of all energy in a food chain is light energy from the Sun
The arrows in a food chain show the transfer of energy from one trophic level to the next
Energy is transferred from one organism to another by ingestion (eating)
In the food chain above:

Food webs

A food web is a network of interconnected food chains

Food webs are more realistic ways of showing connections between organisms within an ecosystem as animals rarely exist on just one type of food source

4 comments

Comments (4)

indu marath

Aug 24

1. What is an apex predator?

2.How does energy flow in a food web?

3.What happens to energy as it moves up the food chain?

4.What is a decomposer and what role does it play in a food web?

5.How can disruptions in a food web affect an ecosystem?

6. What are trophic levels?

Ayana Ashok

Aug 25

Replying to

An apex predator is an animal at the top of the food chain with no natural predators, like lions, sharks, and eagles.
Energy flows in a food web from producers (plants) to various levels of consumers (herbivores, carnivores) and finally to decomposers, with energy decreasing at each level.
As energy moves up the food chain, it decreases, with only about 10% passed to the next level, while the rest is lost as heat.
A decomposer is an organism, like bacteria or fungi, that breaks down dead plants and animals, recycling nutrients back into the ecosystem, which supports the entire food web.
Disruptions in a food web can throw off the balance of an ecosystem, leading to overpopulation of some species, decline of others, and overall instability.
Trophic levels are the different stages in a food chain, from producers to top predators.

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