Methane oxidizing bacteria fatty acids (MOB FA %) and carbon isotope ratios (δ¹³C ‰) in organisms.

<p>MOB FA % represents the sum of the MOB fatty acid markers 16∶1ω8c, 16∶1ω8t, 16∶1ω6c, 16∶1ω5t, 18∶1ω8c and 18∶1ω8t, expressed as percentage of total fatty acids. 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. Fishes are represented by squares, macroinvertebrates by circles, zooplankton by cross and the plant by diamond. The different colors indicate the type of food sources expected to dominate: green indicates herbivory on plant material, blue herbivory on bottom filamentous algae, red carnivory and brown detritivory. Other types of feeding may occur and can result in variability. The data points separate into two major groups, denoted A and B.