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Extreme storm-induced run-off causes rapid, context-dependent shifts in nearshore subtropical bacterial communities

View ORCID ProfileÁngela Ares, View ORCID ProfileMargaret Mars Brisbin, View ORCID ProfileKirk N. Sato, Juan P. Martín, View ORCID ProfileYoshiteru Iinuma, Satoshi Mitarai
doi: https://doi.org/10.1101/801886
Ángela Ares
1Marine Biophysics Unit, Okinawa Institute of Science and Technology (OIST, Okinawa, Japan)
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  • For correspondence: angela.arespita@oist.jp
Margaret Mars Brisbin
1Marine Biophysics Unit, Okinawa Institute of Science and Technology (OIST, Okinawa, Japan)
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Kirk N. Sato
1Marine Biophysics Unit, Okinawa Institute of Science and Technology (OIST, Okinawa, Japan)
2Friday Harbor Laboratories, University of Washington (U.S.A.)
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Juan P. Martín
1Marine Biophysics Unit, Okinawa Institute of Science and Technology (OIST, Okinawa, Japan)
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Yoshiteru Iinuma
3Instrumental Analysis Section, Okinawa Institute of Science and Technology (OIST, Okinawa, Japan)
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Satoshi Mitarai
1Marine Biophysics Unit, Okinawa Institute of Science and Technology (OIST, Okinawa, Japan)
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Abstract

Climate change scenarios predict tropical cyclones will increase in both frequency and intensity, which will escalate the amount of terrestrial runoff entering coastal ecosystems. Prokaryotes are known to respond quickly to environmental change, making them potentially valuable early-warning bioindicators, but relatively little is known about their short-term responses during extreme storms in nearshore subtropical regions. In this study, we combine field observations and mesocosm experiments to assess prokaryotic community dynamics and changes in physicochemical properties during early- and late-season tropical cyclones affecting Okinawa, Japan. Storms caused large and fast influxes of freshwater and terrestrial sediment—locally known as red soil pollution—and caused moderate increases of macronutrients—especially SiO2 and PO4. Rather than shifts in marine bacteria, we primarily detected influxes of common soil-derived bacteria, and putative coral and human pathogens that may derive from other sources; mesocosm experiments confirmed that soil input did not differentially affect marine bacteria. The storm effects on bacterial communities were short-lived and baseline assemblages were quickly recovered following disturbances. Early- and late-season storms caused different physicochemical and bacterial community changes. Our results demonstrate rapid and context-dependent shifts in prokaryotic communities due to extreme storm events in a subtropical coastal ecosystem.

Footnotes

  • https://github.com/maggimars/RedSoil

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted October 13, 2019.
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Extreme storm-induced run-off causes rapid, context-dependent shifts in nearshore subtropical bacterial communities
Ángela Ares, Margaret Mars Brisbin, Kirk N. Sato, Juan P. Martín, Yoshiteru Iinuma, Satoshi Mitarai
bioRxiv 801886; doi: https://doi.org/10.1101/801886
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Extreme storm-induced run-off causes rapid, context-dependent shifts in nearshore subtropical bacterial communities
Ángela Ares, Margaret Mars Brisbin, Kirk N. Sato, Juan P. Martín, Yoshiteru Iinuma, Satoshi Mitarai
bioRxiv 801886; doi: https://doi.org/10.1101/801886

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