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The material acknowledged below is Proprietary and used under licence (not subject to Creative Commons Licence). Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit:
Figure 1 © Dr David J Robinson
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Figure 5 © Dr David J Robinson
Figure 6 © Dr David J Robinson
Filtering food from the ocean © The Open University, contains BBC clips ©BBC
Ecosystems and diversity - a practical activity © The Open University/BBC
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