Quénéhervé Patrick auteur aut IRD Chotte Jean-Luc auteur aut IRD text journalArticle eng text/pdf reformatted digital access This study reports on the distribution of nematodes in different soil habitats under a permanent pasture of digitgrass (Digitaria decumbens Stent. cv. "Pangola") in Martinique. The objectives were to evaluate a gentle fractionation method compatible with further soil nematode extraction and to assess the respective soil microhabitats of plant-feeding nematodes and free-living nematodes. This study indicated that the gentle soil fractionation can effectively separate soil habitats and allow the recovery of associated nematodes. Plant-feeding nematodes were equally distributed between inter-aggregate pores, habitats constituted of aggregated fine silt + clay particles and roots + rhizosphere. Most of free-living nematodes (53%) resided in the inter-aggregate pores. Irrespective of food resource, densities of nematodes (number per gram of habitat) were similar in habitats coarser than 1000 micrometres (A5000, A2000 and A1000). Habitats with the finest soil (A200) were not favourable sites because of the rarity of roots (for plant-feeding nematodes) and physical constraints. (Résumé d'auteur) specialized ECOLOGIE DES PARASITES NEMATODE NEMATOLOGIE VERTISOL PEDOLOGIE AGREGAT MARTINIQUE 074FAUSOL 4 193-200 1996 0929-1393 https://www.documentation.ird.fr/hor/fdi:010013164 10.1016/S0929-1393(96)00118-7 0929-1393 [F B010013164] https://www.documentation.ird.fr/hor/fdi:010013164 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_47-48/010013164.pdf IRD - Base Horizon / Pleins textes 1998-03-16 2017-08-07 fdi:010013164 fre