Articles | Volume 22, issue 16
https://doi.org/10.5194/bg-22-4035-2025
https://doi.org/10.5194/bg-22-4035-2025
Research article
 | 
22 Aug 2025
Research article |  | 22 Aug 2025

Decreasing foraminiferal flux in response to ongoing climate change in the Santa Barbara Basin, California

Emily Havard, Katherine Cherry, Claudia Benitez-Nelson, Eric Tappa, and Catherine V. Davis

Related authors

Ground-truthing the application of compound-specific stable isotopes of amino acids to planktic foraminifera tests from Santa Barbara Basin
Shannon C. Doherty, Emily Havard, Stephanie Christensen, Genevieve M. Pugsley, Matthew D. McCarthy, and Catherine V. Davis
EGUsphere, https://doi.org/10.5194/egusphere-2026-2228,https://doi.org/10.5194/egusphere-2026-2228, 2026
This preprint is open for discussion and under review for Biogeosciences (BG).
Short summary

Cited articles

Alfken, S., Wörmer, L., Lipp, J. S., Napier, T., Elvert, M., Wendt, J., Schimmelmann, A., and Hinrichs, K. U.: Disrupted Coherence Between Upwelling Strength and Redox Conditions Reflects Source Water Change in Santa Barbara Basin During the 20th Century, Paleoceanogr. Paleoclimatol., 36,e2021PA004354 https://doi.org/10.1029/2021PA004354, 2021. 
Auad, G., Roemmich, D., and Gilson, J.: The California Current System in relation to the Northeast Pacific Ocean circulation, Prog. Oceanogr., 91, 576–592, https://doi.org/10.1016/j.pocean.2011.09.004, 2011. 
Barry, J. P., Baxter, C. H., Sagarin, R. D., and Gliman, S. E.: Climate-Related, Long-Term Faunal Changes in a California Rocky Intertidal Community, Science, 267, 672–675, https://doi.org/10.1126/science.267.5198.672, 1995. 
Baumann, K. H., Böckel, B., and Frenz, M.: Coccolith contribution to South Atlantic carbonate sedimentation, in: Coccolithophores, edited by: Thierstein, H. R. and Young, J. R., Springer, Berlin, Heidelberg, Germany, 367–402pp., https://doi.org/10.1007/978-3-662-06278-4_14, 2004. 
Bé, A. W. H., Hemleben, C., Anderson, O. R., Spindler, M., Hacunda, J., and Tuntivate-Choy, S.: Laboratory and Field Observations of Living Planktonic Foraminifera, Micropaleontology, 23, 155–179, https://doi.org/10.2307/1485330, 1977. 
Download
Short summary
This study explores the impact of modern climate change on single-celled, marine organisms in the Santa Barbara Basin called foraminifera. We collect their shells as they sink to the seafloor and compare our record (2014–2021) to previous studies (1993–1998). We find substantial decreases in total foraminifera and warm-water species. Likely influenced by ocean acidification and regional water circulation, these changes have implications for the marine carbon cycle, ecosystem, and fossil record.
Share
Altmetrics
Final-revised paper
Preprint