Exposure to oil from the 2015 Refugio spill alters the physiology of a common harmful algal bloom species, Pseudo-nitzschia australis, and the ubiquitous coccolithophore, Emiliania huxleyi

Tanika M. Ladd, Jessica A. Bullington, Paul G. Matson, Raphael M. Kudela, M. Débora Iglesias-Rodríguez

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Short-term oil exposure impacts on the harmful algal bloom (HAB) species Pseudonitzschia australis and the coccolithophore Emiliania huxleyi were studied by investigating physiological responses in growth, production of transparent exopolymer particles (TEP), P. australis domoic acid (DA) content, and E. huxleyi calcification, with the goal of better understanding the potential effects of the 2015 oil spill near Refugio State Beach in the Santa Barbara Channel, California (USA). While oil exposure negatively impacted growth of both species, P. australis appeared to be more sensitive to oil exposure compared to E. huxleyi. Increased cellular TEP (both species) and DA (P. australis), and abnormal calcification (E. huxleyi) were observed in the presence of oil. The physiological changes detected in these locally important phytoplankton species have implications for other ecosystem processes, human health, and the fate of the spilled oil. The results from this study enhance our understanding of the repercussions of oil pollution events, but further research is necessary to explore ecosystem-wide impacts and chronic or long-term effects of oil in marine environments.

Original languageEnglish
Pages (from-to)61-78
Number of pages18
JournalMarine Ecology Progress Series
Volume603
DOIs
StatePublished - Sep 17 2018
Externally publishedYes

Funding

Acknowledgements. This work was supported by the Simons Foundation (no. 385324) and the University of California, Santa Barbara (UCSB) Associated Students Coastal Fund (no. FALL15-14). We thank Prof. David Valentine (UCSB) for supplying oil collected at Platform Holly and NOAA for supplying oil from the Refugio spill, Scott Lor-anger for providing us with a density measurement for the Platform Holly oil, Andrea Valdez-Schulz and Reina Myers for help in the laboratory, and Christoph Pierre and Christian Orsini for seawater collection. We also thank our colleagues, Dr. Uta Passow and Julia Sweet from UCSB, for their assistance with measuring and analyzing TEP and Kendra Hayashi from the University of California, Santa Cruz, for her assistance with domoic acid analysis.

FundersFunder number
Simons Foundation385324
University of California, Santa Barbara

    Keywords

    • Domoic acid
    • Emiliania huxleyi
    • Oil
    • Phytoplankton
    • Pseudo-nitzschia australis
    • Refugio oil spill

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