Influence of nutrient supply on plankton microbiome biodiversity and distribution in a coastal upwelling region

Chase C. James, Andrew D. Barton, Lisa Zeigler Allen, Robert H. Lampe, Ariel Rabines, Anne Schulberg, Hong Zheng, Ralf Goericke, Kelly D. Goodwin and Andrew E. Allen ()
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Chase C. James: University of California San Diego
Andrew D. Barton: University of California San Diego
Lisa Zeigler Allen: University of California San Diego
Robert H. Lampe: University of California San Diego
Ariel Rabines: University of California San Diego
Anne Schulberg: University of California San Diego
Hong Zheng: J. Craig Venter Institute
Ralf Goericke: University of California San Diego
Kelly D. Goodwin: Atlantic Oceanographic and Meteorological Laboratory, (Stationed at Southwest Fisheries Science Center)
Andrew E. Allen: University of California San Diego

Nature Communications, 2022, vol. 13, issue 1, 1-13

Abstract: Abstract The ecological and oceanographic processes that drive the response of pelagic ocean microbiomes to environmental changes remain poorly understood, particularly in coastal upwelling ecosystems. Here we show that seasonal and interannual variability in coastal upwelling predicts pelagic ocean microbiome diversity and community structure in the Southern California Current region. Ribosomal RNA gene sequencing, targeting prokaryotic and eukaryotic microbes, from samples collected seasonally during 2014-2020 indicate that nitracline depth is the most robust predictor of spatial microbial community structure and biodiversity in this region. Striking ecological changes occurred due to the transition from a warm anomaly during 2014-2016, characterized by intense stratification, to cooler conditions in 2017-2018, representative of more typical upwelling conditions, with photosynthetic eukaryotes, especially diatoms, changing most strongly. The regional slope of nitracline depth exerts strong control on the relative proportion of highly diverse offshore communities and low biodiversity, but highly productive nearshore communities.

Date: 2022
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DOI: 10.1038/s41467-022-30139-4

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