Trait selection and co-existence of phytoplankton in partially mixed systems: Trait based modelling and potential of an aggregated approach
Fig 4
Aggregated properties of the trait distributions, diversity indices and additional characteristics of the trait distributions as a function of nutrient enrichment (Nini) after 100 years (dotted lines) and 1000 years (symbols and solid lines) simulation time.
Results are based on simulations with RM (black) and AM (red). (A) Total concentration (CT), (B) Community average of the master trait HI (TRav), (C) Community trait variance (TRvar) of master trait HI, (D) Functional richness (Frich), i.e the number of trait groups exceeding 10−3 mgC m-3, (E) master trait HI at maximum concentration Cmax (TrCmax), (F) Functional divergence (FD80), and (G) ratio between concentration at Trav and the maximum concentration (fCTrav/Cmax). All characteristics shown were recorded at 0.75 m water depth. The symbols indicate Nini for which simulations were performed, the lines connect these results, but do not imply that simulation results must fall on these lines. I.e. it is not clear whether AM predicts a smooth transition or a discontinuous jump from low to high values Trav around 40 mgP L-1. In all simulations turbulent diffusion was Kz = 5·10−5 m2 s-1.
