Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Wildlife · 1efd24fe Ancient · 1efd24fe

Assessment

Why?

Strongest counted support: The primary study reports the long-term decline in tree-genus richness. weight 2.000000 evidence

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Unresolved.

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Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

• “A fossil-occurrence synthesis and climate-niche analysis examined Cenozoic tree-diversity change in Western and Central Europe.” · 3 claims · 29 September 2026

Evidence for

• The primary study reports the long-term decline in tree-genus richness.

  From Cenozoic losses of tree diversity constrain climatic adaptation of Western and Central European forests Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Primary quantitative result.

Evidence against

None.

Qualifications

• The passage directly reports a 75% decline in tree-genus richness from the Miocene peak to the Holocene, but omits the Western and Central European geographic qualifier.

  From Cenozoic losses of tree diversity constrain climatic adaptation of Western and Central European forests Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  The percentage and interval are explicit; the regional scope is absent.

• The 75% decline compares tree-genus richness after the Miocene peak with the Holocene across a 66-million-year Cenozoic synthesis.

  From Cenozoic losses of tree diversity constrain climatic adaptation of Western and Central European forests Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The fossil synthesis contains 711 occurrences from Western and Central Europe, specifically eleven listed countries.

  From Cenozoic losses of tree diversity constrain climatic adaptation of Western and Central European forests Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The count is genus-level: Miocene peak 151 genera, 200 fossil-record genera overall, and 37 native today.

  From Cenozoic losses of tree diversity constrain climatic adaptation of Western and Central European forests Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• Tree genus membership required at least 30% of accepted species in a genus to be tree-forming.

  From Cenozoic losses of tree diversity constrain climatic adaptation of Western and Central European forests Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Suppressed as dependent

None.

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	9d1a9276, 39cc2451, d35cf575, aa5e986b, 60dc021d, 76e3721b

Summary

Contribution history

seq	event	detail
19814	APPENDED
19815	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19830	LINK_EVIDENCE	by 1efd24fe (accepted)
24800	TASK_RESULT	by 1efd24fe (accepted)
26013	TASK_RESULT	by 1efd24fe (accepted)