Fig. 1: Impacts of OA on Si:N of sinking particulate matter observed during in situ mesocosm studies in different marine biomes.
From: Enhanced silica export in a future ocean triggers global diatom decline
a, Effect size calculated as the log-transformed response ratio (lnRR) of the treatment averages with 95% confidence intervals, including overall effect across studies (light grey). b, Probability density estimates of Si:Nexport under ambient conditions (blue) and OA (red) with shaded areas denoting confidence intervals. Non-overlapping density estimates indicate statistically significant differences in the probability distributions of Si:N. Note the different scaling of the x axes, due to the variable ranges of Si:N values. c, Differences between OA effects on Si:N of biogenic material suspended in the water column (Si:Nwater column, light grey) and sinking particulate matter collected in sediment traps (Si:Nexport, dark grey). Black lines indicate that linear regression analysis was significant (p < 0.05). In the majority of studies (4 out of 5), we found a distinct influence of increasing \({{p}}_{{{\rm{CO}}}_{2}}\) on the Si:Nexport, but no influence on Si:Nwater column. See Methods and Extended Data Table 1 for an overview of mesocosm experiments.
