Figure 6

CLUSTER analysis of diatom assemblage structure under control and elevated CO ₂ and temperature. Dendrogram for hierarchical clustering using group-average linking of Bray–Curtis similarities of diatom abundance of an intertidal sediment (0–2 mm) at the beginning of the experiment (T0) and after 11 days under different temperatures and pH. T 18°C, pH 8.0: Temperature = 18°C, pH = 8.0; T 24°C, pH 8.0.Temperature = 24°C, pH = 8.0; T 18°C, pH 7.4.Temperature = 18°C, pH = 7.4; T 24°C, pH 7.4: Temperature = 24°C, pH = 7.4. Dashed lines indicate groups of samples not separated (at p < 0.05) by SIMPROF.