Abstract
This dataset supports the functional trait-space PCA/TPD and generalised additive model (GAM) components of the study "Functional trait modules link climatic niche geometry to projected range change in global butterflies". The archive contains an analysis-ready seven-trait PCA matrix and species-family mapping; a derived species-level table containing species, family, PC1, PC2 and the GAM response E; relative-path R scripts for PCA/TPD, A50/A99 summaries and pooled and family GAMs; compact prediction and core-edge outputs; and file-level metadata, a manifest and SHA-256 checksums. E is a derived response from the study's upstream species-distribution-model workflow. Raw occurrence records, climate rasters, SDM objects, phylogenetic files, taxonomic reconciliation, imputation workflows, climatic-niche analyses, and SEM workflows are outside the scope of this deliberately minimal archive. The package is intended to support inspection and reproduction of the archived PCA/TPD and GAM components and contains no human-subject information.