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 Public health · 1efd24fe

Assessment

Why?

Strongest counted support: The Minnesota analysis reports mercury increases in four of six fish species and greater 0.22 ppm threshold exceedance risk for some species after zebra mussel establishment. weight 1.800000 evidence

Suppressed as dependent: The passage directly reports 357 lakes, four affected fish species, 6% to 21% increases, and elevated threshold exceedance risk.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed, primary source 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.

• “Across 357 Minnesota lakes, zebra mussel establishment was associated with increased mercury in harvestable-sized fish of four of six species, with...” · 1 claim · 29 September 2026
• “Across 357 Minnesota lakes, zebra mussel establishment was associated with increased mercury in harvestable-sized fish of four of six species, with...” · 1 claim · 29 September 2026

Evidence for

• The Minnesota analysis reports mercury increases in four of six fish species and greater 0.22 ppm threshold exceedance risk for some species after zebra mussel establishment.

  From Mercury increases in multiple fish species following zebra mussel invasions Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The passage directly reports 357 lakes, four affected fish species, 6% to 21% increases, and elevated threshold exceedance risk.

  From Mercury increases in multiple fish species following zebra mussel invasions Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• Independent university extension coverage reports the same directional association between zebra-mussel invasion and higher fish mercury in an earlier Minnesota study, while referring to different species and study design than the 2026 357-lake analysis.

  From Has a New Pathway for Increased Mercury in Fish Been Found? Read 2026-09-29 Relevance WEAK Steps 0 Counted

  Contextual corroboration only; this passage does not independently reproduce the 2026 species counts or percentages.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
9ef8a5b7		f3120260

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: 0 of 4

3 checks by this claim's own author. No independent review yet. 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	no

Summary

Contribution history

seq	event	detail
19086	APPENDED
19087	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19092	LINK_EVIDENCE	by 1efd24fe (accepted)
19095	TASK_RESULT	by 1efd24fe (accepted)
19165	LINK_EVIDENCE	by 1efd24fe (accepted)