PhD effects of agricultural practices on bee ecology effects of agricultural practices on bee ecology using the LTER ECOBEE platform
Honeybees in farmland landscapes: effects of agricultural practices on bee ecology using the LTER ECOBEE platform (Zone Atelier Plaine & Val de Sèvre)
Summary: In a context of agricultural intensification that led to strong declines in biodiversity including wild and honeybees, but beekeeping as well, with societal consequences ranging from pollination services to public health, modern agricultural production systems are more and more questioned. The aim of the thesis is to investigate the ecology of honeybees in cereal agro-ecosystem (which represents the majority of agricultural production areas and beekeeping in France and Europe), especially under stressfull environments, including food stress (lack floral resources in spring), pathological stress (Varroa pathogens) or chemical stress (pesticides), as well as their interactive or additive effects. The ecology of the honeybee will be investigated at its correct spatial scale, i.e. that of landscape. The PHD will aim at defining the landscape characteristics, that depend to a large extent on human activity (land use, crop management, farming practices in regard to pesticides, abundance and distribution of floral resources), that may limit or promote colony demographic dynamics (brood, adult population size, honey reserves). A focus will be devoted to the issue of pesticides and their impact on bees, both in spatial and temporal terms. The study will take place on the Long Term Ecological Research Zone Atelier Plaine & Val de Sèvre, and in particular the ECOBEE platform that is unique in France and Europe. The variety of farming systems and practices, their continuous recording over the last 21 eyars, the size of the study site (450 km²), and the number of hives monitored every year (50) since 2008, provide a unique data set that the PHD student will have full access to.
Supervisor: Jean François Odoux
(co supervisor, HDR, Vincent Bretagnolle)
ODOUX, J.F.; AUPINEL, P. ; GATEFF, S. ; REQUIER, F. ; HENRY, M. &BRETAGNOLLE, V. 2014. ECOBEE: a tool for long-term bee colony monitoring at landscape scale in West European intensive agrosystems. J. Apicultural Research53 :57-66.
ROLIN, O. BRETAGNOLLE, V., DECOUTYE, A., APTEL, J ., MICHEL, N., VAISSIÈRE, B.E. & HENRY, M. 2013. Differences of floral resource use between honey bees and wild bees in an intensive farming system. Agriculture Ecosystems & Environment179: 78-86
HENRY, M., BERTRAND, C., LE FEON, V., REQUIER, F. ODOUX, J.-F., AUPINEL, P., BRETAGNOLLE, V& DECOURTYE. 2014.Pesticide risk assessment in free-ranging bees is weather and landscape dependent.Nature Communication(5) DOI: 10.1038/ncomms5359.
ROLLIN, O., BRETAGNOLLE, V., FORTEL, L., GUILBAUD, L. & HENRY, M. 2015. Habitat, spatial and temporal drivers of diversity patterns in a wild bee assemblage. Diversity & Distribution
REQUIER, F, ODOUX, J.-F. , TAMIC, T.,MOREAU, N.HENRY, M. DECOURTYE, A.& BRETAGNOLLE, V. Honey bee diet in intensive farmland habitats reveals an unexpected flower richness and a critical role of weeds. in press. Ecological Applications.
KLEIJN, D., …BRETAGNOLLE, V., …POTTS, S.G. Managing for pollinators or pollination: conflicts between biodiversity conservation and ecosystem service delivery. In press. Nature communication.
Send a complete CV and a letter of motivation to Jean Francois ODOUX
(firstname.lastname@example.org) before 20 may 2015
UE Entomologie,INRA Le Magneraud,CS 40052 17700 Surgères, France