Figure 6 in Ecology and life cycle of the filter-feeding Amphipsyche meridiana Ulmer 1902 (Trichoptera: Hydropsychidae) in an irrigation canal, central Thailand

Figure 6. Canonical correspondence analysis (CCA) of larval instars of Amphipsyche meridiana, sampling dates and environmental variables in an irrigation pond outlet. Seven environmental variables: SO 3-, sulfate; DO, 4 dissolved oxygen; pH, NH3-N, ammonia-nitrogen; WT, water temperature; Density; Water depth.