The Influence of Plankton Community Structure on Sinking ...
The remaining particle suspension was concentrated by centrifugation, freeze-dried, and ground with a ball mill to transform the sample into a homogenous powder (Boxhammer et al., 2016). Total particulate carbon, nitrogen and phosphorus (TPC, TPN, and TPP), POC, and biogenic silica (BSi) were determined on the powder as described in the following.