Rickard Stenow

Apr 23, 2024 | enviromicro-journals.onlinelibrary.wiley.com | Rickard Stenow |Elizabeth Robertson |Olga Kourtchenko |Martin J. Whitehouse

INTRODUCTION Marine phytoplankton contribute to roughly 50% of global primary production and contribute significantly to global carbon (C) and nitrogen (N) cycling (Armbrust, 2009; Nelson et al., 1995). Many classes of phytoplankton are known to form resting stages which sink to the underlying sediment during temporarily adverse growth conditions in the euphotic zone (Ellegaard & Ribeiro, 2018; Rynearson et al., 2013).

Sep 18, 2023 | nature.com | Elizabeth Robertson |Martin J. Whitehouse |Rickard Stenow

AbstractColony formation in phytoplankton is often considered a disadvantage during nutrient limitation in aquatic systems. Using stable isotopic tracers combined with secondary ion mass spectrometry (SIMS), we unravel cell-specific activities of a chain-forming diatom and interactions with attached bacteria. The uptake of 13C-bicarbonate and15N-nitrate or 15N-ammonium was studied in Chaetoceros affinis during the stationary growth phase.