Perez-Mendez N. auteur aut IRD Anderson G.K.S. auteur aut IRD Requier Fabrice auteur aut IRD Hipolito J. auteur aut IRD Aizen M.A. auteur aut IRD Morales C.L. auteur aut IRD Garcia N. auteur aut IRD Gennari G.P. auteur aut IRD Garibaldi L.A. auteur aut IRD text journalArticle eng text/pdf born digital access 1. The alarming loss of pollinator diversity world-wide can reduce the productivity of pollinator-dependent crops, which could have economic impacts. However, it is unclear to what extent the loss of a key native pollinator species affects crop production and farmer's profits. 2. By experimentally manipulating the presence of colonies of a native bumblebee species Bombus pauloensis in eight apple orchards in South Argentina, we evaluated the impact of losing natural populations of a key native pollinator group on (a) crop yield, (b) pollination quality, and (c) farmer's profit. To do so, we performed a factorial experiment of pollinator exclusion (yes/no) and hand pollination (yes/no). 3. Our results showed that biotic pollination increased ripe fruit set by 13% when compared to non-biotic pollination. Additionally, fruit set and the number of fruits per apple tree was reduced by less than a half in those orchards where bumblebees were absent, even when honeybees were present at high densities. Consequently, farmer's profit was 2.4-fold lower in farms lacking bumblebees than in farms hosting both pollinator species. The pollination experiment further suggested that the benefits of bumblebees could be mediated by improved pollen quality rather than quantity. 4. Synthesis and applications. This study highlights the pervasive consequences of losing key pollinator functional groups, such as bumblebees, for apple production and local economies. Adopting pollinator-friendly practices such as minimizing the use of synthetic inputs or restoring/maintaining semi-natural habitats at farm and landscape scales, will have the double advantage of promoting biodiversity conservation, and increasing crop productivity and profitability for local farmers. Yet because the implementation of these practices can take time to deliver results, the management of native pollinator species can be a provisional complementary strategy to increase economic profitability of apple growers in the short term. specialized ARGENTINE 098 082 076 021 57 3 599-608 2020 0021-8901 https://www.documentation.ird.fr/hor/fdi:010078521 10.1111/1365-2664.13561 0021-8901 [F B010078521] https://www.documentation.ird.fr/hor/fdi:010078521 https://www.documentation.ird.fr/intranet/publi/depot/2020-03-30/010078521.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2020-04-22 2025-02-24 fdi:010078521 fre