Résumé
Phytonematodes and soil nematodes population was studied in the presence of bananas, coffee and coffee trees in Jinotega, Nicaragua. The most densely populated phytonematode in the roots of banana and coffee was Meloidogyne J2, with higher concentration in the roots of coffee (3.429 individuals / 100 gr of coffee root). The genus Pratylenchus increased in coffee under CBL condition (1.186 individuals / 100 gr of coffee root), while decreases in bananas. Trophic groups identified in soil showed no difference between treatments. The largest number of bacteriophages in the treatment appeared CBL, bactephagos of cp2 group showed a higher number of individuals in C, the higher presence of micófagos was found in CB, predators were more numerous in CL and omnivores in C. Indices were calculated about soil web food where the ratio between predator and prey footprint showed statistical difference between treatment CB and treatments CBL, CL and C. (Résumé d'auteur)