Saharan dust deposition initiates successional patterns among marine microbes in the Western Atlantic

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dc.contributor.authorBorchardt, Trace
dc.contributor.authorFisher, Kelsey V.
dc.contributor.authorEbling, Alina M.
dc.contributor.authorWestrich, Jason R.
dc.contributor.authorXian, Peng
dc.contributor.authorHolmes, Christopher D.
dc.contributor.authorLanding, William M.
dc.contributor.authorLipp, Erin K.
dc.contributor.authorWetz, Michael S.
dc.contributor.authorOttesen, Elizabeth A.
dc.date.accessioned2021-05-19T19:30:39Z
dc.date.available2021-05-19T19:30:39Z
dc.date.issued2019-08-02
dc.description.abstractDeposition of aerosolized desert dust can affect marine microbial community structure and function through pulsed addition of limiting micro- and macronutrients. However, few studies have captured responses to dust deposition in situ following trans-oceanic transport. We conducted a 26-d time series evaluating biogeochemical and microbial community response to Saharan dust deposition in surface waters in the subtropical western Atlantic (Florida Keys National Marine Sanctuary, U.S.A.). Following periods of elevated atmospheric dust concentrations, particulate and dissolved iron concentrations increased in surface waters. Autotrophic picoeukaryote abundance increased rapidly, followed by increases in the abundance of heterotrophic bacteria and Synechococcus. Concomitant to cell count changes, we observed successional shifts in bacterial community composition. The relative abundances of Prochlorococcus and Pelagibacter declined with dust arrival, while relative abundance of heterotrophic bacteria increased, beginning with Vibrionales and followed sequentially by Chrysophyceae, Rhodobacteriaceae, and Flavobacteriaceae. Finally, a peak in Synechococcus cyanobacteria was observed. These results provide new insight into microbial community succession in response to Saharan dust deposition, their association with temporal dynamics in surface water dissolved and particulate iron concentrations, and a potential role for bioprocessing of dust particles in shaping marine microbial responses to deposition events.en_US
dc.identifier.citationBorchardt, T., K. Fisher, A. Ebling, J. Westrich, P. Xian, C. Holmes, W. Landing, E. Lipp, M.S. Wetz, and E. Ottesen. 2019. Saharan dust deposition initiates successional patterns among marine microbes in the western Atlantic. Limnology and Oceanography 65: 191-203en_US
dc.identifier.doihttps://doi.org/10.1002/lno.11291
dc.identifier.urihttps://hdl.handle.net/1969.6/89592
dc.publisherWiley Periodicals, Inc.en_US
dc.titleSaharan dust deposition initiates successional patterns among marine microbes in the Western Atlanticen_US
dc.typeArticleen_US

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