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Utilize food chains and food webs to explain the effects of human activities such as overfishing and introducing non-native species into ecosystems.

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Cambridge IGCSE BiologyOrganisms and their environmentCore content

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Utilize food chains and food webs to explain the effects of human activities such as overfishing and introducing non-native species into ecosystems

This point belongs to Food chains and food webs, especially Food chains and food webs outcomes.
You need to be able to utilize food chains and food webs to explain the effects of human activities such as overfishing and introducing non-native species into ecosystems.
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Paper 3 structured question: Food chains and food webs

Paper 3Theory (Core)1 marks

Description

Overfishing in a lake ecosystem

Overfishing has reduced the population of large predatory fish in a lake. This has affected the populations of smaller fish and aquatic plants in the ecosystem.

a
State one effect of overfishing on the lake ecosystem.
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Related learning objectives

Explain that a food chain illustrates how energy is transferred from one organism to another, starting with a producer.
Food chains and food webs outcomes
Create and analyze basic food chains.
Food chains and food webs outcomes
Define a food web as a system of interconnected food chains and analyze food webs.
Food chains and food webs outcomes
Define a producer as an organism that generates its own organic nutrients, typically using sunlight through photosynthesis.
Food chains and food webs outcomes
Define a consumer as an organism that obtains energy by consuming other organisms.
Food chains and food webs outcomes

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