The use of catch data to determine indicators of biodiversity such as 'mean trophic level' does not adequately measure ecosystem changes induced by fishing. Improved ways to assess those changes are required. See Letter p.431
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References
Branch, T. A. et al. Nature 468, 431–435 (2010).
Polacheck, T. Mar. Policy 30, 470–482 (2006).
Worm, B. et al. Science 325, 578–585 (2009).
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Powers, J. Measuring biodiversity in marine ecosystems. Nature 468, 385–386 (2010). https://doi.org/10.1038/468385a
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DOI: https://doi.org/10.1038/468385a
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Effect of excessive CO2 on physiological functions in coastal diatom
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