Fig. 2 in The Singscore: a macroinvertebrate biotic index for assessing the health of Singapore's streams and canals

Fig. 2. Partial canonical correspondence analysis (pCCA) ordination showing differences in macroinvertebrate community composition in the 33 urban canals (open circles) and the 14 reference streams (closed triangles). The main environmental drivers (pH and copper) of community dissimilarity are depicted as solid arrows.