sdm-scale-replication

A self-contained replication of the headline scale-dependence claim of Hurlbert & Jetz (2007), "Species richness, hotspots, and the scale dependence of range maps in ecology and conservation" (PNAS 104(33):13384–13389, doi:10.1073/pnas.0704469104).

Using 61.7 million modern GBIF occurrence records for 964 Iberian bird species on an equal-area HEALPix-NESTED grid (Nside 16–512), the replication reproduces the original's central finding: biodiversity-hotspot identity is strongly scale-dependent, with hotspot misidentification rising monotonically as the grid is refined. The magnitude differs from the original (≈90–98 % misidentification at the 0.25° equivalent vs. 48–69 % in 2007); a gold-standard test against EU Birds Directive Article 12 expert range-map polygons attributes the offset predominantly to observer-effort bias in the citizen-science GBIF atlas, not to a refutation of the claim. Outcome: partially supported.

This release contains:

• Reproducible pipeline: notebooks 01_data_download → 04_figures, Snakefile, pixi.toml + pixi.lock, Dockerfile.
• CI, Jupyter Book, and Docker (GHCR) GitHub Actions workflows.
• A FORRT nanopublication chain on the Science Live platform.

Cite via CITATION.cff.