Resumo

SAEZ, Agustín; SABATINO, Malena  e  AIZEN, Marcelo. La diversidad floral del borde afecta la riqueza y abundancia de visitantes florales nativos en cultivos de girasol. Ecol. austral [online]. 2014, vol.24, n.1, pp.94-102. ISSN 1667-782X.

The floral diversity of field margins influences the richness and abundance of native flower visitors in sunfower felds: Pollinator decline has been related to different types of anthropogenic disturbances, a topic largely debated in the context of global change. Within this debate, it has been stressed the importance of natural or semi-natural habitat remnants as pollinator sources for nearby agricultural fields. The SW of Buenos Aires Province is a highly-impacted and intensively-used agricultural region. However, field margins associated with country roads can provide diverse foristic resources and nesting sites for a variety of pollinators, which can eventually improve pollination and productivity of neighboring pollinator-dependent crops. Here, we evaluated the effect of floral diversity of field margins on the richness and abundance of foral visitors across 17 sunflower lots in the districts of Balcarce and Lobería. Our results indicate that floral diversity of field margins had a positive effect on the richness and abundance of native floral visitors in the adjacent crop field. As a consequence, pollination services in these agroecosystems would be promoted by increasing the amount and diversity of these marginal habitats.

Palavras-chave : Floral visitors; Floral diversity; Agro-ecosystems; Sunflower.

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