Les Diplopodes d’un ecosysteme forestier tempéré; répartition spatio-temporelle des populations

In the Foljuif Forest (Seine-et-Marne, France), the millipede community is composed of five main species. A seasonal sampling has been made in the litter and soil layers: L, F, H, A11, A12 and A13. Millipedes are always absent in the deepest sandy layers. The spatial distribution is described for the five specific populations along the annual cycle 1982/83. The average density is 169 ind./m2 for the millipede community and 133 ind./m2 for the dominant species Cylindroiulus punctatus. On a scale of 1/16 m2, the coexistence of several species is permanent. The coexistence patterns of C. punctatus and C. nitidus in 1/4 m2 are compared with the previous results obtained on a scale of 1/16 m2, which shows a mutual exclusion tendency.