Niche Differentiation between Two Sympatric Cubitermes Species (Isoptera, Termitidae, Cubitermitinae) Revealed by Stable C and N Isotopes.

Many African termite species are true soil-feeders: how can they coexist, sometimes with high densities? How do they separate their trophic niches? Preliminary results suggest that two coexisting Cubitermes species forage in different soil layers, and stable C and N isotopes show that they feed on different organic material. Cubitermes aff. ugandensis forages near the soil surface whereas C. aff. sankurensis forages in deeper layers; however, unexpectedly, the former shows a higher δ15 N than the latter, highlighting, for the first time, a trophic niche differentiation between two sympatric true soil feeders bearing different enteric valve patterns.