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Scales of Spatial Heterogeneity of Plastic Marine Debris in the Northeast Pacific Ocean

Figure 8

Comparison of plastic debris concentrations from visual and net tow data.

Hollow circles indicate stations with visual observations and manta tow stations within 25(n = 23). Solid circles indicate median plastic abundance for visual observations and manta tow stations taken on the line sampling patterns within 9 km of each other. Lines extending from solid circles are bootstrap 95% confidence intervals. Data for solid circles is given in Table 2. Spearman's rank correlation rho = 0.603, p = 0.001. Regression line fit using Theil-Sen single median method.

Figure 8

doi: https://doi.org/10.1371/journal.pone.0080020.g008