title: A 'Landscape physiology' approach for assessing bee health highlights the benefits of floral landscape enrichment and semi-natural habitats.
abstract: Understanding how anthropogenic landscape alteration affects populations of ecologically- and economically-important insect pollinators has never been more pressing. In this context, the assessment of landscape quality typically relies on spatial distribution studies, but, whether habitat-restoration techniques actually improve the health of targeted pollinator populations remains obscure. This gap could be filled by a comprehensive understanding of how gradients of landscape quality influence pollinator physiology. We therefore used this approach for honey bees (Apis mellifera) to test whether landscape patterns can shape bee health. We focused on the pre-wintering period since abnormally high winter colony losses have often been observed. By exposing colonies to different landscapes, enriched in melliferous catch crops and surrounded by semi-natural habitats, we found that bee physiology (i.e. fat body mass and level of vitellogenin) was significantly improved by the presence of flowering catch crops. Catch crop presence was associated with a significant increase in pollen diet diversity. The influence of semi-natural habitats on bee health was even stronger. Vitellogenin level was in turn significantly linked to higher overwintering survival. Therefore, our experimental study, combining landscape ecology and bee physiology, offers an exciting proof-of-concept for directly identifying stressful or suitable landscapes and promoting efficient pollinator conservation.
authors.affiliation: INRA, UR406 Abeilles et Environnement, Domaine Saint-Paul, CS 40509, 84914 Avignon, France.|UMT PrADE, CS 40509, 84914 Avignon, France.
authors.forename: Cédric
authors.initials: C
authors.lastname: Alaux
authors.affiliation: UMT PrADE, CS 40509, 84914 Avignon, France.|ITSAP-Institut de l'Abeille, Domaine Saint-Paul, CS 40509, 84914 Avignon, France.
authors.forename: Fabrice
authors.initials: F
authors.lastname: Allier
authors.affiliation: UMT PrADE, CS 40509, 84914 Avignon, France.|ITSAP-Institut de l'Abeille, Domaine Saint-Paul, CS 40509, 84914 Avignon, France.|ACTA, CS 40509, 84914 Avignon, France.
authors.forename: Axel
authors.initials: A
authors.lastname: Decourtye
authors.affiliation: INRA, UE1255 Entomologie, 17700 Surgères, France.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Odoux
authors.affiliation: INRA, UE1255 Entomologie, 17700 Surgères, France.
authors.forename: Thierry
authors.initials: T
authors.lastname: Tamic
authors.affiliation: INRA, UE1255 Entomologie, 17700 Surgères, France.
authors.forename: Mélanie
authors.initials: M
authors.lastname: Chabirand
authors.affiliation: ADAPIC, Cité de l'Agriculture, 45921 Orléans, France.
authors.forename: Estelle
authors.initials: E
authors.lastname: Delestra
authors.affiliation: INRA, UR406 Abeilles et Environnement, Domaine Saint-Paul, CS 40509, 84914 Avignon, France.
authors.forename: Florent
authors.initials: F
authors.lastname: Decugis
authors.affiliation: INRA, UR406 Abeilles et Environnement, Domaine Saint-Paul, CS 40509, 84914 Avignon, France.|UMT PrADE, CS 40509, 84914 Avignon, France.
authors.forename: Yves
authors.initials: Y
authors.lastname: Le Conte
authors.affiliation: INRA, UR406 Abeilles et Environnement, Domaine Saint-Paul, CS 40509, 84914 Avignon, France.|UMT PrADE, CS 40509, 84914 Avignon, France.
authors.forename: Mickaël
authors.initials: M
authors.lastname: Henry
mesh_terms: D000818:Animals; D001516:Bees / Q000469:parasitology / Q000502:physiology*; D004032:Diet; D017753:Ecosystem; D005216:Fat Body / Q000378:metabolism; D035264:Flowers / Q000502:physiology*; D008954:Models, Biological; D011058:Pollen / Q000502:physiology; D012621:Seasons; D016019:Survival Analysis; D057077:Varroidae / Q000502:physiology; D014819:Vitellogenins / Q000378:metabolism
chemical_list: D014819:Vitellogenins