Figure 2: Nutrient enrichment after heavy rainfall.

Ambient nutrient concentrations at Buoy 0 sampled between 31 Octoberā10 December 2011 (light grey bars) are compared against the nutrient concentrations in the sediment plume observed at the outlet of Piscadera Bay on 23 November 2011 (dark grey bars). Error bars represent s.d. of the mean (nā=ā30 for ambient nutrient concentrations and nā=ā6 for sediment plume). Differences between the ambient nutrient concentrations and those in the sediment plume were tested by the two-sample Studentās t-test (for equal variances) or the Welchās t-test (for unequal variances).