Resumen de Estudio de la macrofauna edáfica (orden araneae). Su riqueza y abundancia en invernáculos sujetos a un manejo convencional y en transición agroecológica. Partido de La Plata, Argentina
Gabriel Ignacio Baloriani,, Marco Antonio Benamú,, Mariana Marasas, Santiago J. Sarandón
Taking into account the ecological role of spiders in agroecosystems, the aim of this paper was to study its richness and abundance in two greenhouses in La Plata, one under conventional management (IC) and another in agroecological transition (IT). Individuals were capture using pitfall traps. It was collected 2818 individuals in IT and 1585 in IC, which belonged to 21 families: 20 in (IT) and 19 in (IC). The Families better represented were Lycosidae, Linyphiidae, Hahnidae, Tetragnathidae, Anyphaenidae and Corinnidae. It was found similar guilds under both managements and similar proportions between them. The better represented groups in both treatments were hunter running spiders and spinning wanders of irregular web like sheet. Nevertheless it was observed differences in abundance, may be related to IT management based on a reduced use of agrochemical, higher biodiversity of crops and spontaneous plant that favor habitat, shelter and food for spiders, which would act as potential pest controllers. Pesticide reduction and increase in biodiversity are fundamentals strategies to take into account to reach biotic regulation in agroecosystems.
