Fig. 1.

Spatial distributions and long-term latitudinal changes in biodiversity of diatoms (genus level), Ceratium dinoflagelates (species level), and calanoid copepods (species level) in the extratropical North Atlantic Ocean, 1960–2007, in relation to maximum and annual variability in SST. Mean spatial distribution (1960–2007) of biodiversity of (A) diatoms, (B) Ceratium, and (C) copepods is shown. Plankton biodiversity as a function of two variables, i.e., maximum SST and an index of annual variability in SST, is shown for (D) diatoms, (E) Ceratium, and (F) copepods.