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. 2016 Jun 7;7:11833. doi: 10.1038/ncomms11833

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(a) Upright algal cover (macroalgae, cyanobacteria and tall turf algae), with herbivore exclusion and/or nutrient pollution over time. Total cover often exceeds 100% due to the three-dimensional algal canopy. (b) Macroalgal species richness over time. P values are from mixed effect models (Supplementary Table Data 1c). Data are means±s.e.m.