Growth rate and Fast Repetition Rate fluorometry (FRRf) of phytoplankton

Ocean alkalinity enhancement (OAE) is a promising carbon removal method, but it may cause a significant perturbation of the ocean with trace metals such as Nickel (Ni). This study tested the effect of increasing Ni concentrations on phytoplankton growth and photosynthesis. The data were the growth rates of 11 phytoplankton species under different Ni concentrations (Master thesis project). The growth rates were calculated using daily fluorescence signal values measured by the fluorometer. Fv/Fm and SigmaPSII data were measured using Fast repetition rate fluorometry (FRRf). The growth rate and photo-physiological response of phytoplankton was analysed using generalised additive models (GAMs) and plotted in RStudio (R packages “mgcv” and “ggplot2”).

海洋碱度增强（Ocean Alkalinity Enhancement, OAE）是一种颇具前景的碳移除手段，但该手段可能会对海洋中镍（Ni）等痕量金属造成显著扰动。本研究探究了镍浓度升高对浮游植物生长与光合作用的影响。本数据集来自硕士毕业论文项目，涵盖11种浮游植物在不同镍浓度下的生长速率。生长速率通过荧光计测定的每日荧光信号值计算得到；Fv/Fm与SigmaPSII数据则通过快速重复率荧光计（Fast Repetition Rate Fluorometry, FRRf）测得。研究采用广义加性模型（Generalised Additive Models, GAMs）分析浮游植物的生长速率与光生理响应，并借助RStudio（R包“mgcv”与“ggplot2”）完成可视化绘图。