Fig. 3
From: Aquatic community structure and stream habitat in a karst agricultural landscape
Non-metric multidimensional scaling ordination (NMDS) biplots of 22 stream sites on the South Fork Whitewater River, Minnesota, USA, based on abundances of benthic invertebrates and stream habitat variables at each site. Numbers represent sites (see Fig. 1), separate ellipses enclose the 12 upstream sites and the 10 downstream sites, and arrows represent locations of greatest abundance for invertebrates (A) and strongest influence of stream habitat variables (B) whose values were statistically (α = 0.05) correlated with the complete NMDS model (see Table 4)