Fig. 2
From: Bracken growth, toxin production and transfer from plant to soil: a 2-year monitoring study
a Measured aboveground biomass for the 2018 (blue) and 2019 (red) growing seasons expressed as g DW m−2 (n = 6). b Average PTA content in bracken pinna calculated as PTA equivalent in terms of PTA (PTATOT) (n = 6, all analysis performed in duplicates). c PTA content, in PTA equivalent, in bracken canopy for the same period (n = 6). Average and standard deviation indicated by the points and error bars, respectively