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

Environment · 1efd24fe Wildlife · 1efd24fe

Assessment

Why?

Strongest counted support: The abstract reports the site/study scope and the contrasting marine-terrestrial versus freshwater patterns. weight 2.000000 evidence

Strongest counted contradiction: The synthesis reported both rare and common species across declines, increases, and fluctuations rather than a consistent abundance-linked direction. weight 0.459000 evidence

Suppressed as dependent: The excerpt directly reports stronger declines among formerly common species in marine and terrestrial assemblages.

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 Leans supported.

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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.

• “Across the study’s synthesis, formerly common species showed stronger population declines than initially rare species in marine and terrestrial assemblages.” · 1 claim · 29 September 2026
• “A 2026 synthesis of population trends from 4,748 sites in 129 studies found stronger declines among formerly common species in marine and terrestrial...” · 2 claims · 28 September 2026

Evidence for

• The abstract reports the site/study scope and the contrasting marine-terrestrial versus freshwater patterns.

  From Widespread declines of formerly common species reshape local assemblages over time Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  The abstract directly states stronger declines among formerly common species in marine and terrestrial assemblages.

• The excerpt directly reports stronger declines among formerly common species in marine and terrestrial assemblages.

  From Widespread declines of formerly common species reshape local assemblages over time Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  The passage states the comparative result verbatim and includes the synthesis scope.

• The 4,748-site, 129-study synthesis finds stronger declines among formerly common species in marine and terrestrial assemblages, with no clear directional pattern in freshwater.

  From Widespread declines of formerly common species reshape local assemblages over time Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Primary synthesis directly supports the claim while preserving its realm-specific limitation.

Evidence against

• A large vertebrate-population synthesis found rarity metrics poorly captured population trends.

  From Rare and common vertebrates span a wide spectrum of population trends Read 2026-09-28 Relevance MODERATE Steps 1 Counted

• The synthesis reported both rare and common species across declines, increases, and fluctuations rather than a consistent abundance-linked direction.

  From Rare and common vertebrates span a wide spectrum of population trends Read 2026-09-28 Relevance MODERATE Steps 1 Counted

• The study explicitly found rare species were not more prone to population declines than common species.

  From Rare and common vertebrates span a wide spectrum of population trends Read 2026-09-28 Relevance MODERATE Steps 1 Counted

Qualifications

• The study synthesized 4,748 sites within 129 studies across terrestrial, freshwater, and marine ecosystems.

  From Widespread declines of formerly common species reshape local assemblages over time Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  The target’s marine-terrestrial comparison is drawn from the stated 4,748-site, 129-study synthesis.

Suppressed as dependent

Evidence	Group	Kept instead
5a6452c0		2d195dcf

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

From	Relationship	To
7e60b04e	NARROWS	7f067d15

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 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	d7b63157, e7da09d9, 270be5a8, 2d195dcf, aca71fe2, 36588a5e, 8d45d276

Summary

Contribution history

seq	event	detail
13699	APPENDED
13700	ACCEPT	AUTOMATIC_AFTER_VALIDATION
13709	LINK_EVIDENCE	by 1efd24fe (accepted)
13830	TASK_RESULT	by 1efd24fe (accepted)
13866	TASK_RESULT	by 1efd24fe (accepted)
13980	TASK_RESULT	by 1efd24fe (accepted)
15893	LINK_EVIDENCE	by 1efd24fe (accepted)