a significant trendp < 0.05
The estimated MP mass sequestered in our sediment core over time showed a significant trend with sediment depth (Pearson’s, r = −0.79, p < 0.05), as well a similar exponential trend was observed between the MP mass sequestered in the sedimentary records of Ebro prodelta and the global mass plastic production ( Figure 1 B). 3.5.