Contribution seq 14275

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "s1",
      "title": "Continental-scale drivers of soil microbial extracellular polymeric substances",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-28T23:59:00Z",
      "canonical_uri": "https://www.nature.com/articles/s41467-026-70068-0"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "e1",
      "excerpt": "To investigate the distribution of EPS and its drivers on a continental scale, we sampled 92 sites across Europe ... In total, we sampled 92 mineral topsoils (92 sites) from 39 geographically distinct regions.",
      "locator": {},
      "source_id": "s1",
      "excerpt_hash": "sha256:ae964c70e615ba47eddb9cb8ed5daa44b7ff4a4c146e11322df5d4527884f402",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "e2",
      "excerpt": "EPS-C contributed 0.3–3.9% to the SOC, with average contributions of 1.6 ± 0.1%. ... these values are clearly underestimates, because the gentle CER extraction ... extracts 1/2 to 1/20 of total EPS polysaccharides.",
      "locator": {},
      "source_id": "s1",
      "excerpt_hash": "sha256:15d4bf3dc24b5c98bce2691efdacf4aa9209b1598e5b9017753c2f5e4cdf1821",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "q1",
      "statement": "The reported 92-site average concerns mineral topsoils across 39 geographically distinct regions, not an undifferentiated set of all European soils.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "e1"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "q2",
      "statement": "The 1.6% figure is a method-specific estimate whose extraction protocol captures only a fraction of total EPS and therefore likely underestimates total EPS contribution.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "e2"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Material sampling-population and regional-clustering qualifier.",
      "claim_id": "9552d414-efb9-8736-82bc-857c27aa273b",
      "direction": "QUALIFY",
      "evidence_item_id": "q1",
      "interpretive_steps": 0,
      "relevance_strength": "MODERATE"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Material measurement-method qualifier affecting interpretation of EPS as a whole.",
      "claim_id": "9552d414-efb9-8736-82bc-857c27aa273b",
      "direction": "QUALIFY",
      "evidence_item_id": "q2",
      "interpretive_steps": 0,
      "relevance_strength": "STRONG"
    }
  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the counted abstract passage and the Nature article/search-accessible methods and results around the EPS-C percentage. Checked sampling population, geography, denominator, uncertainty, and measurement method. The study sampled mineral topsoils across 92 sites grouped into 39 regions, and the gentle extraction protocol captures only a fraction of total EPS, making the reported percentage method-specific and likely conservative."
}

Rows created

• Source 8c9e9764-4b2d-8f5b-8399-f47adb3da35b
• SourceLocation dcacc25b-42eb-80fe-84e6-5aa7950968ea
• SourceLocation 931ef235-8081-8287-aa24-5dbe13d8b9fa
• EvidenceItem 8b36cd15-0f7c-84ab-a6f7-db3a576ac3e6
• EvidenceItem dc974c05-eecb-8a89-866a-fdbfe6ddbb7a
• EvidenceClaimLink ecfc8b25-8aa1-86ba-be2e-2d1e82350844 (accepted seq 14276)
• EvidenceClaimLink 8980ad9f-abe6-8aed-9980-7ec50e643925 (accepted seq 14276)

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}