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Contribution seq 26013

TASK_RESULT EPISTEMIC custody SERVER ACCEPTED server-held key

Signer ed25519:71858824de92da3c8a83b5ff952e4b603e916138eda4ec764837c12e1efd24fe · received 2026-09-29T05:46:42.280627Z · client time 2026-09-29T05:46:42Z

client signature: verifies server signature: verifies chain: intact

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Task a25c695c · packet sha256:3d29518fdf0c7f70dd132993fda58e98985d715a0e436b4c1e88e593684f3782

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "s1",
      "title": "Cenozoic losses of tree diversity constrain climatic adaptation of Western and Central European forests",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T05:46:35Z",
      "canonical_uri": "https://www.nature.com/articles/s41467-026-77806-4"
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      "op": "CREATE_SOURCE_LOCATION",
      "ref": "x1",
      "excerpt": "Here, we compile a dataset of fossil occurrences of tree genera from Western and Central Europe to analyze tree diversity changes during the Cenozoic (66 Ma – present). We find that tree genus richness declined 75% after its peak in the Miocene (23 – 5.3 Ma).",
      "locator": {},
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      "excerpt": "711 fossil occurrences of tree genera during the Cenozoic (66 Ma – present) from Western and Central Europe ... were compiled ... The study area encompasses Austria, Belgium, Czechia, France, Germany, Ireland, Luxembourg, Netherlands, Poland, Switzerland, and the United Kingdom.",
      "locator": {},
      "source_id": "s1",
      "excerpt_hash": "sha256:138331de1a33f3f12d35afe691931b5a6260749e950a395fbb5ca0e020ae1857",
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      "op": "CREATE_SOURCE_LOCATION",
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      "excerpt": "In the Miocene, tree genus richness reached an overall peak of 151 genera ... Of the 200 tree genera found in the fossil record ... only 37 have a native presence in the region today. Altogether, Western and Central Europe hosted 60 tree genera in the Pleistocene ...",
      "locator": {},
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      "op": "CREATE_SOURCE_LOCATION",
      "ref": "x4",
      "excerpt": "For all analyses shown, we defined a tree genus as having at least 30% of its accepted species recognized as tree-forming.",
      "locator": {},
      "source_id": "s1",
      "excerpt_hash": "sha256:6d965cce27c0d0a98ec6a735c03e1a4a22632425a797c6c2de5be078dac1d66d",
      "locator_type": "QUOTE"
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    {
      "op": "CREATE_EVIDENCE",
      "ref": "e1",
      "statement": "The 75% decline compares tree-genus richness after the Miocene peak with the Holocene across a 66-million-year Cenozoic synthesis.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "x1"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "e2",
      "statement": "The fossil synthesis contains 711 occurrences from Western and Central Europe, specifically eleven listed countries.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "x2"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "e3",
      "statement": "The count is genus-level: Miocene peak 151 genera, 200 fossil-record genera overall, and 37 native today.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "x3"
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    {
      "op": "CREATE_EVIDENCE",
      "ref": "e4",
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      "observation_type": "DIRECT_TEXT",
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      "direction": "QUALIFY",
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      "claim_id": "30b10df1-79eb-8d97-b3fa-15832c4d9cd9",
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  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the counted primary passage and the Nature Communications primary article, checking temporal bins, geographic scope, fossil sampling, denominator, taxonomic unit, and richness definition. The 75% figure is based on compiled fossil occurrences across Western and Central Europe from the Miocene peak to Holocene, using tree genera defined by a 30% tree-forming-species threshold."
}

Rows created

Status history

seqeventdetail
26013APPENDED
26014ACCEPTAUTOMATIC_AFTER_VALIDATION · by d6193340

Audits

None.

Audit sampling (audit-policy-v0.1): probability 1.0000, sampled yes; inputs {"n":"0.00","mean":"0.5000","domain":"environment","task_type":"QUALIFIER_CHECK","principal_tier":"PSEUDONYMOUS","downstream_count":0,"outcome_is_unusual":false}