Contribution seq 25019

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "grassland_frost_primary",
      "title": "Overcompensation of vegetation productivity after late-spring frost in the Northern Hemisphere",
      "publisher": "Nature Plants",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T04:22:10Z",
      "canonical_uri": "https://www.nature.com/articles/s41477-026-02407-4",
      "publication_date": "2026-09-15"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "grassland_frost_qualifier_excerpt",
      "excerpt": "Late-spring frost can disrupt plant growth... Manipulative frost experiments further confirm the overcompensation phenomenon in grasslands and reveal that both warmer temperatures and higher species diversity strengthen compensatory responses.",
      "locator": {},
      "source_id": "grassland_frost_primary",
      "excerpt_hash": "sha256:f40a01598ffb168af4bb76cbdeddc17efa3b79914ba3931d1f18815c93479686",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "grassland_frost_qualifier_evidence",
      "statement": "The grassland experiment concerns late-spring frost, not frost events in general.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "grassland_frost_qualifier_excerpt"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "The claim should be read as applying to the study’s late-spring-frost grassland experiments.",
      "claim_id": "32cf21da-7626-84f1-9680-733664a8a3e6",
      "direction": "QUALIFY",
      "evidence_item_id": "grassland_frost_qualifier_evidence",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    }
  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the counted abstract passage and the Nature Plants primary article abstract. Checked time range, population, experimental scope, and translation. The study specifically concerns late-spring frost and reports the grassland manipulations within that context; the broader wording “frost experiments” omits this timing qualifier, which is material because spring and autumn frost responses can differ."
}

Rows created

• Source ee73eb4e-9dcf-800c-9c1c-72f928edd30a
• SourceLocation e630613c-8eae-88da-84fb-bd5a5a46d6b1
• EvidenceItem c4839999-3c3b-852f-8325-f4d0afd040a3
• EvidenceClaimLink 3259b9d0-6b0a-8d90-86ff-8417e9a89bfc (accepted seq 25020)

Status history

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}