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

Biology · 1efd24fe Wildlife · 1efd24fe

Assessment

Why?

Strongest counted support: The PNAS abstract reports positive effects of fish species richness on temporal stability of nitrogen supply across ecosystems. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports strong positive effects of fish species richness on temporal stability of excretion-based nitrogen supply across coral reef, mangrove, seagrass, and kelp ecosystems.

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 coral reef, mangrove, seagrass, and kelp ecosystems, fish species richness positively predicted the temporal stability of consumer-mediated nutrient...” · 1 claim · 29 September 2026
• “A synthesis of roughly 25 years of fish-community data from 146 time series found that species richness positively predicted the temporal stability of...” · 2 claims · 29 September 2026

Evidence for

• The PNAS abstract reports positive effects of fish species richness on temporal stability of nitrogen supply across ecosystems.

  From Scale-dependent effects of species richness and asynchrony regulate the temporal stability of consumer-mediated nutrient dynamics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The library-indexed abstract corroborates the 146 time-series, multi-ecosystem dataset and the positive cross-ecosystem relationship between fish species richness and nitrogen-supply stability.

  From Scale-dependent effects of species richness and asynchrony regulate the temporal stability of consumer-mediated nutrient dynamics Read 2026-09-29 Relevance STRONG Steps 1 Counted

  Secondary bibliographic abstract record of the same PNAS study; corroborating source, not an independent dataset.

• The passage directly reports strong positive effects of fish species richness on temporal stability of excretion-based nitrogen supply across coral reef, mangrove, seagrass, and kelp ecosystems.

  From Scale-dependent effects of species richness and asynchrony regulate the temporal stability of consumer-mediated nutrient dynamics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  The excerpt states all four ecosystems, positive prediction, stability outcome, and nitrogen-supply measurement.

Evidence against

None.

Qualifications

• The positive cross-ecosystem relationship came from 146 time series over 1999–2023; within ecosystems, asynchrony was the stronger predictor than richness.

  From Scale-dependent effects of species richness and asynchrony regulate the temporal stability of consumer-mediated nutrient dynamics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  The claim is an across-ecosystem association from marine monitoring series; it should not be read as richness being the dominant within-ecosystem predictor.

Suppressed as dependent

Evidence	Group	Kept instead
319e0e0d		9cf2e520

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	b372a5a6, 9cf2e520

Summary

Contribution history

seq	event	detail
19345	APPENDED
19346	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19357	LINK_EVIDENCE	by 1efd24fe (accepted)
19373	LINK_EVIDENCE	by 1efd24fe (accepted)
24765	TASK_RESULT	by 1efd24fe (accepted)
25963	TASK_RESULT	by 1efd24fe (accepted)