The ordination of our data showed that (see Fig 4, quadrant II of the space generated by the PCA) in olive plantations that grow within a potential deciduous oak region over dry soils, and in which disturbance generated by man was limited to seasonal grass mowing, feeding strategies that exploit vegetal resources in an opportunistic (e.g., Amara sicula, Harpalus attenuates and Ophonus azureus; see Fig 5) or exclusive way (i.e., seed-eating species, such as Carterus rotundicollis and Ophonus ardosiacus) were positively selected. Meanwhile, when under the same potential vegetation, humid soil conditions, the disturbance by man is greater (PCA quadrant I; Fig 4), then seed eaters left room for opportunistic or predator feeding strategies (e.g., Anchomenus dorsalis, Pseudophonus rufipes and Brachinus sclopeta; see Fig 5).