The DOI matches its Crossref record; 8 of the 8 references it cites were found in a registry or an index.
Biogeochemical evidence for euxinic oceans and ecological disturbance presaging the end-Permian mass extinction event
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
A review of sterol markers for marine and terrigenous organic matter
Volkman, J. K. (1986) · Organic Geochemistry · doi:10.1016/0146-6380(86)90089-6 · Cited by 1,951
The Evolution of Modern Eukaryotic Phytoplankton
Falkowski, P. G., Katz, M. E., Knoll, A. H., Quigg, A., Raven, J. A., Schofield, O., & Taylor, F. J. R. (2004) · Science · doi:10.1126/science.1095964 · Cited by 1,613
Permo-Triassic Boundary Superanoxia and Stratified Superocean: Records from Lost Deep Sea
Isozaki, Y. (1997) · Science · doi:10.1126/science.276.5310.235 · Cited by 842
Sedimentary nitrogen isotopic ratio as a recorder for surface ocean nitrate utilization
Altabet, M. A., & Francois, R. (1994) · Global Biogeochemical Cycles · doi:10.1029/93gb03396 · Cited by 792
Biosynthesis of 2-methylbacteriohopanepolyols by an anoxygenic phototroph
Rashby, S. E., Sessions, A. L., Summons, R. E., & Newman, D. K. (2007) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0704912104 · Cited by 281
Self-citationCatastrophic chemical events in the history of the ocean
Holser, W. T. (1977) · Nature · doi:10.1038/267403a0 · Cited by 250
The Geological Succession of Primary Producers in the Oceans
KNOLL, A. H., SUMMONS, R. E., WALDBAUER, J. R., & ZUMBERGE, J. E. (2007) · Evolution of Primary Producers in the Sea · doi:10.1016/b978-012370518-1/50009-6 · Cited by 249
Self-citationBiogeochemical controls on photic-zone euxinia during the end-Permian mass extinction
Meyer, K. M., Kump, L. R., & Ridgwell, A. (2008) · Geology · doi:10.1130/g24618a.1 · Cited by 176
Cited by
Initial pulse of Siberian Traps sills as the trigger of the end-Permian mass extinction
Burgess, S. D., Muirhead, J. D., & Bowring, S. A. (2017) · Nature Communications · doi:10.1038/s41467-017-00083-9 · Cited by 389
Marine productivity changes during the end-Permian crisis and Early Triassic recovery
Shen, J., Schoepfer, S. D., Feng, Q., Zhou, L., Yu, J., Song, H., Wei, H., & Algeo, T. J. (2015) · Earth-Science Reviews · doi:10.1016/j.earscirev.2014.11.002 · Cited by 329
Geological constraints on the origin of oxygenic photosynthesis
Farquhar, J., Zerkle, A. L., & Bekker, A. (2011) · Photosynthesis Research · doi:10.1007/s11120-010-9594-0 · Cited by 223
Ader, M., Sansjofre, P., Halverson, G. P., Busigny, V., Trindade, R. I. F., Kunzmann, M., & Nogueira, A. C. R. (2014) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2014.03.042 · Cited by 180
Methanogenic burst in the end-Permian carbon cycle
Rothman, D. H., Fournier, G. P., French, K. L., Alm, E. J., Boyle, E. A., Cao, C., & Summons, R. E. (2014) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1318106111 · Cited by 169
Self-citation
Metadata
- Authors
- Cao, C., Love, G. D., Hays, L. E., Wang, W., Shen, S., & Summons, R. E.
- Venue
- Earth and Planetary Science Letters
- Publisher
- Elsevier BV
- Published
- 2009-05-15
- Volume
- 281
- Issue
- 3-4
- Pages
- 188-201
- ISSN
- 0012-821X (ISSN-L)
- OpenAlex
- W2058540966
- Cited by
- 388
- References
- 8
- FWCI
- 21.73
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Biogeochemical evidence for euxinic oceans and ecological disturbance presaging the end-Permian mass extinction event. https://app.cochat.ai/papers/10.1016/j.epsl.2009.02.012
- The paper
- Cao, C., Love, G. D., Hays, L. E., Wang, W., Shen, S., & Summons, R. E. (2009). Biogeochemical evidence for euxinic oceans and ecological disturbance presaging the end-Permian mass extinction event. Earth and Planetary Science Letters. https://doi.org/10.1016/j.epsl.2009.02.012
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
