@prefix this: <https://w3id.org/sciencelive/np/RA7zowzpxWmmoRaFkRtc6xLUf395EYHMi0QwYAuQKtBAw> .
@prefix sub: <https://w3id.org/sciencelive/np/RA7zowzpxWmmoRaFkRtc6xLUf395EYHMi0QwYAuQKtBAw/> .
@prefix np: <http://www.nanopub.org/nschema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix npx: <http://purl.org/nanopub/x/> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://w3id.org/sciencelive/np/RA7zowzpxWmmoRaFkRtc6xLUf395EYHMi0QwYAuQKtBAw> a
    np:Nanopublication;
  np:hasAssertion sub:assertion;
  np:hasProvenance sub:provenance;
  np:hasPublicationInfo sub:pubinfo;
  dc:created "2026-06-21T14:14:57.890Z"^^xsd:dateTime;
  dc:creator <https://orcid.org/0000-0002-1784-2920>;
  dc:license <https://creativecommons.org/licenses/by/4.0/>;
  npx:introduces sub:po-delta-light-intrusion-outcome;
  npx:wasCreatedAt <https://platform.sciencelive4all.org>;
  <http://www.w3.org/2000/01/rdf-schema#label> "Source Extractor catalogs 453 settlements; ~18.5% of the Po Delta is lit";
  <https://w3id.org/np/o/ntemplate/wasCreatedFromTemplate> <https://w3id.org/np/RA2zljn0Nw9SadppOyxZoh-_Rxosslrq-vYG-p9SttnJE> .

sub:po-delta-light-intrusion-outcome a <https://w3id.org/sciencelive/o/terms/FORRT-Replication-Outcome>;
  <http://schema.org/endDate> "2026-06-20"^^xsd:date;
  <http://www.w3.org/2000/01/rdf-schema#label> "Source Extractor catalogs 453 settlements; ~18.5% of the Po Delta is lit";
  <https://w3id.org/sciencelive/o/terms/hasConclusionDescription> "An astronomy source-detection tool — Source Extractor (SExtractor / SEP) — run unchanged through Galaxy on VIIRS night lights, detects and catalogs lit settlements just as it catalogs stars, and turns that catalog into a biodiversity-impact measure. The Po Delta Natura 2000 protected area is darker than its surroundings (mean night radiance 0.96 vs 4.11 nW/cm^2/sr region-wide) and so remains a relative dark refuge, but artificial light already covers about 18.5 percent of its area and 145 detected settlements lie within roughly 10 km of it — a measurable encroachment of light pollution on a nocturnal-biodiversity wetland. This confirms the cross-discipline transfer: a FAIR, well-described Galaxy tool from astronomy does useful Earth-observation / biodiversity work without modification.";
  <https://w3id.org/sciencelive/o/terms/hasConfidenceLevel> <https://w3id.org/sciencelive/o/terms/Moderate>;
  <https://w3id.org/sciencelive/o/terms/hasEvidenceDescription> """Po Delta / eastern Po Valley, NASA Black Marble VNP46A4 (VIIRS) 2021 annual composite (tile h19v04), run on usegalaxy.eu. Source Extractor cataloged 453 settlements region-wide (position, flux, size). Inside Natura 2000 sites the mean radiance is 1.34; inside the Po Delta it is 0.96, versus 4.11 region-wide. 18.5 percent of the Po Delta area exceeds 1 nW/cm^2/sr (lit); 145 cataloged settlements fall within ~10 km of the Po Delta. The Galaxy run and a local SEP reimplementation give the same catalog (453 settlements both ways). Provenance: results/galaxy_provenance.json (Galaxy history + parameters); figures/main_result.png.

Github: https://github.com/annefou/fiesta-galaxy-sourceextractor-eo""";
  <https://w3id.org/sciencelive/o/terms/hasLimitationsDescription> "This is a single annual snapshot, not a temporal trend, over one region. Night-lights radiance is a proxy for human presence and artificial-light exposure, not a direct biodiversity measurement, and \"lit\" uses a single 1 nW/cm^2/sr threshold. In the most intensely lit parts of the Po plain the background is no longer dark, so source detection there is less clean — the method works best at the refuge/city edge, like the Po Delta. Agreement between the Galaxy and local runs demonstrates reproducibility, not independent external validation, since both use the same SEP algorithm.";
  <https://w3id.org/sciencelive/o/terms/hasOutcomeRepository> <https://doi.org/10.5281/zenodo.20784962>;
  <https://w3id.org/sciencelive/o/terms/hasValidationStatus> <https://w3id.org/sciencelive/o/terms/Validated>;
  <https://w3id.org/sciencelive/o/terms/isOutcomeOf> <https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/po-delta-sourceextractor-study> .

sub:assertion prov:wasAttributedTo <https://orcid.org/0000-0002-1784-2920> .

<https://orcid.org/0000-0002-1784-2920> <http://xmlns.com/foaf/0.1/name> "Anne Fouilloux" .

sub:sig npx:hasAlgorithm "RSA";
  npx:hasPublicKey "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";
  npx:hasSignature "lCQtxmUxavdo99ctcyAJaK6Y4C8AlU1IkDRDjfzaomq37rqngsetmDkorUu8YcMTo6D+CfBj4JBfgj89y0B60YgWes39A9Z5KsR66Zo8Or7Adv2uLlpQPBXNNyHPoQUIVCO6HttMZ7PaJBY12JrLwAt99ezq6WY3VY5h/soRvsD94i0CSrWEvAIxS/nDLbWLnWD/WYhxiYkS+w0drj49S/IIAfz0ZTIq8Jy6qSXl6ffGCWdGZWQ1oWAI8MxplNw2bRzMMIEc+6/9Oj5/Z6Txh+FpfZY/JqtxrhC/vCBdQw/6cTI8Z9i7SkzpJhPpurlK4QQN11M4tZtrt4w8QI+3sFEFdFvKjb7FEaafErrLPo7mt3PlMnnkytO1rg9iQnVgaU26Y2gOJbioAAD2OI5Yy3G2Cp9tyxVblNXZP4I76DHGdW0r2QKoF5NEOnkBcEaAYzvxVnwVhNamGIkmlDjqnQeAeMzSBimmQb/eENj3YQWAliWxmJst/pnSsRGtc5cedLLWqiMmLQnFWa8SWvZq5rsxaluRyDhlM4WyEKRRH/xASV3vzLbqn4WGB1solByuGLotMGBKjbR39xfdQ6/ql6gZzWpHHgcy4d0WEFC1sAMI7/XR+vKif9z/Rq6TpRPmiy4wjXi2YC46feqJOj50NSgCSHgIYBRsgIj0axNqba4=";
  npx:hasSignatureTarget <https://w3id.org/sciencelive/np/RA7zowzpxWmmoRaFkRtc6xLUf395EYHMi0QwYAuQKtBAw>;
  npx:signedBy <https://orcid.org/0000-0002-1784-2920> .