Figure 3.

Seasonal component of environmental variables temperature, ${\mathrm{NO}}_3^{-}$, ${\mathrm{PO}}_4^{3-}$, POC, PON), zooplankton and chlorophyll a concentration (a proxy for the biomass of autotrophic phytoplankton), taxonomic and morphological diversity indices (richness, evenness, diversity/divergence). This component was derived by seasonal-trend decomposition by Loess over 2009–2020. Curves were smoothed with a moving average (window size = 5) and all variables were scaled and centred (mean = 0, variance = 1) for display.