Articles | Volume 17, issue 11
https://doi.org/10.5194/bg-17-2923-2020
https://doi.org/10.5194/bg-17-2923-2020
Research article
 | 
03 Jun 2020
Research article |  | 03 Jun 2020

Southern California margin benthic foraminiferal assemblages record recent centennial-scale changes in oxygen minimum zone

Hannah M. Palmer, Tessa M. Hill, Peter D. Roopnarine, Sarah E. Myhre, Katherine R. Reyes, and Jonas T. Donnenfield

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Cited articles

Al-Sabouni, N., Fenton, I. S., Telford, R. J., and Kučera, M.: Reproducibility of species recognition in modern planktonic foraminifera and its implications for analyses of community structure, J. Micropalaeontol., 37, 519–534, https://doi.org/10.5194/jm-37-519-2018, 2018. 
Bakun, A.: Climate change and ocean deoxygenation within intensified surface-driven upwelling circulations, Philos. T. R. Soc. A, 375, 20160327, https://doi.org/10.1098/rsta.2016.0327, 2017. 
Balestra, B., Krupinski, N. B. Q., Erohina, T., Fessenden-Rahn, J., Rahn, T., and Paytan, A.: Bottom-water oxygenation and environmental change in Santa Monica Basin, Southern California during the last 23 kyr, Palaeogeogr. Palaeocl., 490, 17–37, 2018. 
Balmaki, B., Wigand, P. E., Frontalini, F., Shaw, T. A., Avnaim-Katav, S., and Rostami, M. A.: Late Holocene paleoenvironmental changes in the Seal Beach wetland (California, USA): A micropaleontological perspective, Quaternary Int., 530, 14–24, https://doi.org/10.1016/j.quaint.2019.10.012, 2019. 
Bernhard, J. M. and Bowser, S. S.: Benthic foraminifera of dysoxic sediments: chloroplast sequestration and functional morphology, Earth-Sci. Rev., 46, 149–165, 1999. 
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Short summary
Modern climate change is causing expansions of low-oxygen zones, with detrimental impacts to marine life. To better predict future ocean oxygen change, we study past expansions and contractions of low-oxygen zones using microfossils of seafloor organisms. We find that, along the San Diego margin, the low-oxygen zone expanded into more shallow water in the last 400 years, but the conditions within and below the low-oxygen zone did not change significantly in the last 1500 years.
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