Marine litter abundance and composition in Arraial do Cabo, Brazil

Reproducible dataset and Python analysis workflow for marine litter abundance and composition across 24 transects sampled at Praia Brava and Ilha do Pontal, Arraial do Cabo, Rio de Janeiro, Brazil. The deposit includes the source workbook, validated processed data, analysis scripts, statistical tables, publication-ready figures in English, an English Results section, and a color sampling-design schematic. Analyses include descriptive summaries, Hellinger-transformed PCA, K-means clustering, Bray-Curtis PERMANOVA, PERMDISP, factorial PERMANOVA, and the Clean Coast Index. Version 1.0.0 corresponds to Git commit 5cd53a6fe8166c4795d88bebeb290e014c3df9b4.