Fig. 1

Experimental design. Twenty fire salamander larvae (Salamandra salamandra) from each habitat type (pond, stream) were placed into individual microcosms filled with sediment and benthic organisms. After one week, 30 microcosms (10 with larvae from ponds, LP, 10 with larvae from streams, LS, and 10 controls, C) were sampled. After another week, the remaining 30 microcosms were sampled.