Dendrogram from UPGMA cluster analysis based on a Bray-Curtis similarity matrix of organisms according to MOB FA contributions.

<p>The isotope ratios of carbon (δ¹³C ‰ vs. PDB) were included for comparison. Ca- <i>Chaoborus</i> sp., Ce- Ceratopogonidae, Ch1- Chironomidae sp.1, Ch2- Chironomidae sp.2, Eph- <i>Campsurus</i> sp., F1- <i>Tetragonopterus argenteus</i>, F2- <i>Astyanax</i> cf. <i>bimaculatus</i>, F3- <i>Parauchenipterus galeatus</i>, F4- <i>Crenicichla</i> sp., F5- <i>Potamorhina squamoralevis</i>, F6- <i>Cyphocharax</i> sp., F7- <i>Anadoras grypus</i>, F8- <i>Leporinus friderici</i>, F9- <i>Steindachnerina brevipinna</i>, Eich- <i>Eichhornia crassipes</i>, Zoo- Zooplankton. The FA 16∶1ω8c, 16∶1ω8t, 16∶1ω6c, 16∶1ω5t, 18∶1ω8c and 18∶1ω8t were used as MOB markers.