Contribution seq 25787

Payload

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      "title": "Reduced N2 fixation in the tropical Atlantic Ocean during the warm late Pliocene",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T05:31:33Z",
      "canonical_uri": "https://www.nature.com/articles/s41467-026-75846-4"
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      "excerpt": "We present a new record of past N2 fixation based on FB-δ15N measurements spanning the late Pliocene and into the Early Pleistocene (~3.6 Ma to ~2 Ma) from the Western Tropical Atlantic (WTA) ODP Site 999A. We compare our WTA record with new data from the Eastern Equatorial Atlantic ODP Site 662.",
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      "ref": "e1",
      "statement": "The evidence comes from two named Atlantic core sites and covers approximately 3.6 to 2 million years ago, not all tropical Atlantic sediments.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "x1"
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  "searched": "Read the counted primary passage and the Nature Communications article, checking time range, sampled population, denominators, baseline, sampling, jurisdiction, and translation. The primary study specifies records from Western Tropical Atlantic ODP Site 999A and Eastern Equatorial Atlantic ODP Site 662 spanning roughly 3.6–2 million years ago, a material sampling qualifier."
}

Rows created

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• SourceLocation 41c034db-9253-8e67-b342-5f0b69734ae8
• EvidenceItem ec8290b1-6ab3-8b63-bf45-7e7e50f2d0a7
• EvidenceClaimLink 835d0d41-3d4e-88cf-b675-37ab87354e76 (accepted seq 25788)

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}