The Team

Dr. Isabel Seguro Requejo

 ORCiD: 0000-0001-8453-0057

I am an early career marine scientist. Previous work includes: variability patterns and potential environmental factors influencing microplankton abundance and species composition in tropical estuaries; phytoplankton physiology and identification by microscopy; determination of the first data set on net and gross primary production rates during a Celtic Sea spring bloom and seasonality at high resolution with dissolved oxygen-to-argon ratios and triple oxygen isotopes.

Current work assesses: the contribution of bacterioplankton respiration and how it varies with plankton community structure and dissolved organic matter; quantifying coupled cycles of carbon, oxygen, and nutrients for determining safe operating spaces with respect to tipping points; how life can survive in the Earth's deep, hot subsurface - and give insight into how early life took hold on our planet. I gained experience and expertise in many new analytical techniques, ranging over a wide disciplinary spectrum: from mass spectrometry to culturing a range of bacteria (including SAR11 and cyanobacteria) and phytoplankton species, extraction of dissolved organic carbon from seawater, investigating the bioenergetics of the electron transport system activity, electron kinetic models, and inhibition of the electron transport chain, cell bio-imaging, using optodes, flow cytometry, staining techniques (DAPI, SYBR green), analysis of dissolved organic carbon, nitrogen, and phosphorous and RNA amplicon sequencing. I would like to use my eight years of experience in primary production and respiration to solve gaps in knowledge on air-sea gas exchange (O2 and CO2) because of these biological processes, and physical processes like wind, waves, and ocean warming, especially in most unexplored regions such as tropics or polar environments and therefore I would like to push my career in that direction.