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. 2012 Feb 21;7(2):e31897. doi: 10.1371/journal.pone.0031897

Figure 5. Gastropods, food types and diets in Lake Sibaya, 2009.

Figure 5

(A) Four-point 3 m transect showing gastropod densities and microphytobenthic (MPB) biomass (as chl-a concentration). (B) Carbon and nitrogen stable isotope signatures of gastropods (number in brackets: trophic position) and their potential food sources, such as detritus (DTR) and sedimentary organic matter (SOM). SIAR boxplots show the proportional contribution (%) of different sources to the diet of (C) Tarebia granifera and (D) Bulinus natalensis. Samples were collected in November 2009. This lake has no connection to the sea and contains pure freshwater.