title: Potential supply of floral resources to managed honey bees in natural mistbelt forests.
abstract: Honey bees play a vital role in the pollination of flowers in many agricultural systems, while providing honey through well managed beekeeping activities. Managed honey bees rely on the provision of pollen and nectar for their survival and productivity. Using data from field plot inventories in natural mistbelt forests, we (1) assessed the diversity and relative importance of honey bee plants, (2) explored the temporal availability of honey bee forage (nectar and pollen resources), and (3) elucidated how plant diversity (bee plant richness and overall plant richness) influenced the amount of forage available (production). A forage value index was defined on the basis of species-specific nectar and pollen values, and expected flowering period. Up to 50% of the overall woody plant richness were found to be honey bee plant species, with varying flowering period. As expected, bee plant richness increased with overall plant richness. Interestingly, bee plants' flowering period was spread widely over a year, although the highest potential of forage supply was observed during the last quarter. We also found that only few honey bee plant species contributed 90 percent of the available forage. Surprisingly, overall plant richness did not significantly influence the bee forage value. Rather, bee plant species richness showed significant and greater effect. The results of this study suggest that mistbelt forests can contribute to increase the spatial and temporal availability of diverse floral resources for managed honey bees. Conservation efforts must be specifically oriented towards honey bee plant species in mistbelt forests to preserve and enhance their potential to help maintain honey bee colonies. The implications for forest management, beekeeping activities and pollination-based agriculture were discussed.
authors.affiliation: Department of Forest and Wood Science, Stellenbosch University, Private Bag X1, 7602 Matieland, South Africa; Laboratoire de Biomathématiques et d'Estimations Forestières, Université d'Abomey-Calavi, Cotonou 03 BP 2819, Bénin. Electronic address: sylvanus.m89@gmail.com.
authors.forename: Sylvanus
authors.initials: S
authors.lastname: Mensah
authors.affiliation: South African National Biodiversity Institute, Kirstenbosch Research Centre, Private Bag X7, 7735 Claremont, South Africa; Department of Conservation Ecology and Entomology, Stellenbosch University, Private Bag X1, 7602 Matieland, South Africa.
authors.forename: Ruan
authors.initials: R
authors.lastname: Veldtman
authors.affiliation: Department of Forest and Wood Science, Stellenbosch University, Private Bag X1, 7602 Matieland, South Africa.
authors.forename: Thomas
authors.initials: T
authors.lastname: Seifert
mesh_terms: D000383:Agriculture; D000818:Animals; D001516:Bees; D044822:Biodiversity; D035264:Flowers; D065928:Forests; D011058:Pollen; D054817:Pollination; D013019:South Africa
keywords: Forage value; Honey bee plant richness; Nectar; Plant diversity; Pollen; South Africa