Niokolo-Koba 50-Year Supplementary Dataset: Species, Climate, Demographics, and Land Use Context for the NK-Badiar Transboundary Complex

v1.1 — Corrected species total (1,608), Badiar overlap (164 transboundary), lion population (29-50 per Mengual et al. 2024), mercury scoped to Kedougou/Gambia basin (3.9t), wild dog range corrected (1 of 13 W. African countries), fish taxonomy updated (Enteromius niokoloensis). Includes 11 fact-check verification files. Independent supplementary dataset for the NK-Badiar transboundary complex assembled from 15+ public data sources.