Photoautotrophy

Laboratory-based

• ¹⁴C-carbon uptake (NPP)
• 18O-labelled water (GOP)
• Winkler light-dark dissolved O2 bottle
• Phytoplankton carbon biomass (Cphyto) x growth rate (µ)
• 13-Carbon uptake
• Gross Primary Production (GPP) - triple oxygen
• Net community production (NCP)

In situ measurements

• Net community production (NCP) - O₂/Ar
• Continuous dissolved oxygen (DO) optodes

Global optics-based

• Single Turnover Chlorophyll Fluorescence
• Remote Sensing NPP
• BGC-Argo NPP

Omics-based

• RT-qPCR/ddPCR
• rcbL gene expression/quant
• psbA
• Rubisco protein
• PSII/PSI quantification