A5008559319- Marine and coastal ecosystems
- Diatoms and Algae Research
- Microbial Community Ecology and Physiology
- Wastewater Treatment and Nitrogen Removal
- Marine Biology and Ecology Research
- Mercury impact and mitigation studies
University of Gothenburg
2020-2024
The planktonic marine diatom Skeletonema marinoi forms resting stages, which can survive for decades buried in aphotic, anoxic sediments and resume growth when re‐exposed to light, oxygen, nutrients. mechanisms by they maintain cell viability during dormancy are poorly known. Here, we investigated cell‐specific nitrogen (N) carbon (C) assimilation survival rate stages of three S. strains. Resting were incubated with stable isotopes dissolved inorganic N ( DIN ), the form 15 N‐ammonium NH 4 +...
Diatoms can survive long periods in dark, anoxic sediments by forming resting spores or cells. These have been considered dormant until recently when cells of Skeletonema marinoi were shown to assimilate nitrate and ammonium from the ambient environment conditions. Here, we show that S. also perform dissimilatory reduction (DNRA), Transmission electron microscope analyses showed chloroplasts compacted, few large mitochondria had visible cristae within Using secondary ion mass spectrometry...
Colony formation in phytoplankton is often considered a disadvantage during nutrient limitation aquatic systems. Using stable isotopic tracers combined with secondary ion mass spectrometry (SIMS), we unravel cell-specific activities of chain-forming diatom and interactions attached bacteria. The uptake 13C-bicarbonate and15N-nitrate or 15N-ammonium was studied Chaetoceros affinis the stationary growth phase. Low cell-to-cell variance 15N-nitrate assimilation within chains prevailed early Up...
Abstract Formation of large colonies by phytoplankton is considered a disadvantage during low nutrient and non‐turbulent conditions because diffusion limitation competition neighboring cells. This assumed models not empirical measurements. Here, we measured cell‐specific dissolved inorganic carbon (DIC) nitrate () assimilation in two chain‐forming Skeletonema marinoi strains combining secondary ion mass spectrometry with stable isotopic tracer incubations. The pelagic were recently...