Figure 2 from: Gutjahr S, Schmidt S, Hahn H (2014) A proposal for a groundwater habitat classification at local scale. Subterranean Biology 14: 25-49. https://doi.org/10.3897/subtbiol.14.5429

Figure 2 - MDS (Multi-dimensional scaling) ordination of invertebrate assemblages of each trap (faunal data aggregated by mean for traps having 13–15 samplings). Vectors show physical and chemical parameters of groundwater explaining the distribution of traps within the MDS best (Fe = Total dissolved iron [mg l-1]). Naming of the traps in accordance with Table 1.