ECOLOGY OF MONONCHID NEMATODES FROM SPAIN RELATIONSHIPS BETWEEN SPECIES AND HABITATS

In this paper relationships between the mononchid nematodes more frequ ently found in continental Spain and fourteen habitat types are studie d; data obtained from various general surveys have been subjected to m ultivariate statistical treatment on the basis of cluster and correspo ndence analyses. Species distribution makes it possible to establish f our different habitat groups : i) aquatic and riverside habitats; ii) vegetable, fruit tree and ornamental gardens, marginal, uncultivated a nd abandoned crops; iii) extensive dry and irrigated lands, brush edge s and degraded soils; iv) evergreen-oak, deciduous and coniferous wood s and reforestations. The existence of species groups and relationship s between the species and the habitats is also tested. Mononchus aquat icus and M. truncatus appear to be associated with aquatic environment s, Prionchulus muscorum, Coomansus parvus and Miconchus studeri with n atural woods and Anatonchus tridentatus, Mylonchulus sigmaturus and Cl arkus papillatus with arable soils.