Fig. 1. Temporal trends of species groups associated with redundancy analysis (RDA) axes 1 and 2 for invertebrates (1988–2007, full black lines) and phytoplankton (1992–2007, dotted grey lines) indicated by linear combination (lc) score plots. Shown are the overall trends (means ± standard deviations) from lakes with significant temporal structure (n = 26, invertebrates; n = 19, phytoplankton) (A), and the trends in selected lakes (B).