Mutualism between earthworms and soil microflora 6th international symposium on earthworm ecology Trigo, D. Barois, I. Garvin, M.H. Huerta, E. Irisson, S. Lavelle, P. LOMBRIC MICROFLORE INTERACTION DIGESTION MATIERE ORGANIQUE ESPECE TROPICALE ETUDE EXPERIMENTALE ETUDE COMPARATIVE MUTUALISME ESPECE TEMPEREE MUCUS INTESTINAL The gut mucus production of different earthworms species has been measured in order to verify the mutualistic hypothesis between earthworms and soil microflora. Earthworms of different origin (tropical and temperate) and ecological category (endogeic, anecic and epigeic), individuals of the same species occupying different soils, and earthworms of different species from the same soil, have been studied. Intestinal mucus production suggests the existence of the mutualistic digestion system. The mucus percentage in the gut was greater in the epigeic than in both anecic and endogeic. Nevertheless, the relative enrichment was higher in the endogeic species. The organic matter content of the substratum seems to play a regulating role in the mutualistic system, because the greater the substratum organic matter content the lower the relative enrichment. Generally, in temperate zones more mucus was added to the substratum, suggesting that the low temperature do necessary a greater microflora simulation. (Résumé d'auteur) Diaz Cosin, D.J. (ed.) Jesus, J.B. (ed.) Trigo, D. (ed.) Garvin, M.H. (ed.) 1999 text https://www.documentation.ird.fr/hor/fdi:010021122 fdi:010021122 Trigo D., Barois I., Garvin M.H., Huerta E., Irisson S., Lavelle P.. Mutualism between earthworms and soil microflora. In : Diaz Cosin D.J. (ed.), Jesus J.B. (ed.), Trigo D. (ed.), Garvin M.H. (ed.), . 6th international symposium on earthworm ecology 1999, 43 (6), 866-873 International Symposium on Earthworm Ecology, 6. EN