Movimiento de abejorros entre cultivos de frutos rojos y hábitats naturalesinfluencia en la producción de fresa, explotación de los recursos florales silvestres y prevalencia de parásitos

Abstract

This Thesis aims to investigate the spillover of commercial and wild pollinators between natural and agriculture habitats promoted by the variability of floral resources, which depends on season and the surrounding landscape. Specifically, the ways in which commercial and wild pollinators contribute to fruit production are assessed. In parallel, the presence and density of commercial pollinators compared to native taxa in natural habitats adjacent to crops is quantified. Moreover, in terms of possible ecological risks, the overlap in floral resource exploitation between commercial and native pollinators, and the parasite prevalence in commercial bumblebee colonies used in crops, are studied. To do this, sampling and field experiments were carried out both in agricultural and in natural habitats in the Guadalquivir Valley, province of Huelva (SW Spain).