This contains 3 presentations covering:
9.1.1 Food Chains and Food webs
9.1.2 Disruption to Food Webs
9.1.3 + 9.1.4 Ecosystems and Competition

No worksheets are required for any of these lessons - but it is important to read the presenter notes under the slides prior to the lesson as there are many animations (especially in 9.1.2) which require some narration.

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