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Picophytoplankton Dynamics in a Large Temperate Estuary and Impacts of Extreme Storm Events by Paerl, Ryan W. ;Venezia, Rebecca E. ;Sanchez, Joel J. ;Paerl, Hans W. is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Abstract Picophytoplankton (PicoP) are increasingly recognized as significant contributors to primary productivity and phytoplankton biomass in coastal and estuarine systems. Remarkably though, PicoP composition is unknown or not well-resolved in several large estuaries including the semi-lagoonal Neuse River Estuary (NRE), a tributary of the second largest estuary-system in the lower USA, the Pamlico-Albemarle Sound. The NRE is impacted by extreme weather events, including recent increases in precipitation and flooding associated with tropical cyclones. Here we examined the impacts of moderate to extreme (Hurricane Florence, September 2018) precipitation events on NRE PicoP abundances and composition using flow cytometry, over a 1.5 year period. Phycocyanin-rich Synechococcus-like cells were the most dominant PicoP, reaching ~ 10^6^ cells mL^−1^, which highlights their importance as key primary producers in this relatively long residence-time estuary. Ephemeral “blooms” of picoeukaryotic phytoplankton (PEUK) during spring and after spikes in river flow were also detected, making PEUK periodically major contributors to PicoP biomass (up to ~ 80%). About half of the variation in

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Author

Paerl, Ryan W. ;Venezia, Rebecca E. ;Sanchez, Joel J. ;Paerl, Hans W.

Publisher

Springer Science and Business Media LLC

Published

2020

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)