@prefix this: . @prefix sub: . @prefix np: . @prefix rdf: . @prefix prov: . @prefix npx: . @prefix dc: . @prefix xsd: . sub:Head { this: a np:Nanopublication; np:hasAssertion sub:assertion; np:hasProvenance sub:provenance; np:hasPublicationInfo sub:pubinfo . } sub:assertion { sub:hj2007-iberia-healpix-study a , ; "Replication of Hurlbert & Jetz 2007 hotspot scale-dependence in Iberian birds on a HEALPix-NESTED substrate"; , , , ; """Hurlbert & Jetz 2007 overlaid expert-drawn bird range maps (Handbook of the Birds of the World; regional atlases) on two structured regional bird-atlas surveys (Australia, southern Africa) on lat-lon grids at 0.25-8 degrees, circa 2007. This replication deviates on four axes: - Range-map layer: convex hulls of GBIF occurrences (a surrogate), cross-checked against EU Article 12 expert distribution polygons — not WWF / Handbook expert range maps. - Atlas layer: modern GBIF occurrence richness (post-2000, citizen-science-dominated for the all-observations strategy) — not a dedicated structured atlas survey with controlled effort. - Substrate: HEALPix-NESTED equal-area cells — not a lat-lon graticule, removing the cell-area distortion intrinsic to lat-lon grids. - Region and era: the Iberian peninsula, 2013-2024 GBIF / 2013-2018 Article 12 — not Australia or southern Africa, circa 2007. The two-basis-of-record design (museum vs all-observations) is an addition to the original: it probes observer-effort sensitivity, a dimension unavailable to Hurlbert & Jetz before citizen-science data dominated occurrence records. The consequences of these deviations for the headline number are quantified in the linked Replication Outcome's Evidence and Limitations fields."""; ; """Iberian bird occurrence records (Spain, Portugal, Andorra, Gibraltar) were obtained from GBIF as two basis-of-record strategies, each with a citable download DOI: a \"museum\" strategy (PRESERVED_SPECIMEN + MACHINE_OBSERVATION; GBIF download DOI 10.15468/dl.r8pcat) and an \"all-observations\" strategy (additionally HUMAN_OBSERVATION, i.e. citizen-science records; GBIF download DOI 10.15468/dl.e9xv7p). Records were year-split at 2000. Post-2000 occurrences form the atlas-equivalent layer (per-cell richness = number of distinct species observed in the cell). Pre-2000 occurrences form the range-map- equivalent layer (per species, the convex hull of its occurrences, whose cell coverage contributes to per-cell range-map richness). Both layers are binned onto a HEALPix-NESTED ladder at Nside 16, 32, 64, 128, 256 and 512 (cell side approximately 407 km down to 13 km, bracketing Hurlbert & Jetz's 0.25-8 degree range) using the geographic, WGS84-aware healpix-geo library, NESTED ordering throughout. At each resolution, hotspots are the top-5% richest cells (Hurlbert & Jetz's definition); the headline metric is the symmetric non-overlap of the atlas-derived and range-map-derived hotspot sets. A Wilcoxon signed-rank test on the paired per-cell richness provides the dissolution criterion (statistical indistinguishability at P > 0.10, matching the original's >= 4 degree threshold). A verification battery tests robustness: a peninsula-only land mask (NaturalEarth 10m); a top-K hotspot-threshold sweep (1-25%); a per-species pre/post convex-hull drift measure (Jaccard distance); an atlas-richness-versus-observer-effort (per-cell record count) correlation; and two tighter range-map surrogates — a concave hull, and EU Birds Directive Article 12 expert distribution polygons (EEA, 2013-2018, 10 km grid, CC-BY 4.0; 260 Iberian breeding species) used as a gold-standard cross-check on the convex-hull surrogate. The full pipeline is a Snakemake workflow (download -> clean -> analysis -> figures) reproducible from a fresh checkout; the verification battery lives in companion diagnostic notebooks."""; """Scope: the scale-dependence of bird species-richness hotspot identification. The replication tests whether Hurlbert & Jetz's central finding — that range-map-derived richness hotspots disagree with finer-resolution survey-derived hotspots, with the disagreement growing as the grid is refined and dissolving only at coarse grain — re-emerges for a different region (the Iberian peninsula) under modern occurrence data and an equal-area sphere-aware substrate. In scope: the top-5%-richest-cells hotspot definition; the symmetric non-overlap between range-map-derived and atlas-derived hotspot sets; how that non-overlap varies across a spatial-resolution ladder; and the coarse-grain resolution at which the two richness surfaces become statistically indistinguishable. Out of scope: Hurlbert & Jetz's secondary findings (per-species range occupancy / commission rates, and protected-area coverage of hotspots); and all non-bird taxa — the original claim and this replication are bird-only."""; . } sub:provenance { sub:assertion prov:wasAttributedTo . } sub:pubinfo { "Anne Fouilloux" . this: dc:created "2026-05-24T07:27:28.283Z"^^xsd:dateTime; dc:creator ; dc:license ; npx:introduces sub:hj2007-iberia-healpix-study; npx:wasCreatedAt ; "Replication of Hurlbert & Jetz 2007 hotspot scale-dependence in Iberian birds on a HEALPix-NESTED substrate"; . sub:sig npx:hasAlgorithm "RSA"; npx:hasPublicKey "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"; npx:hasSignature "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"; npx:hasSignatureTarget this:; npx:signedBy . }