A Contribution to the Environmental Relationship of the Pollen Spectra of Honeys from Ourense (NW Spain)

Abstract

Abstract The influence of environmental conditions on the pollen spectra of honeys is analyzed with reference to two different aspects: a. Interannual differences in pollen content related to changes in the flora. b. Intraannual differences in pollen spectra and utilization of the flora by honey bees. The pollen content of honeys collected between 1986 and 1991 reflects the modifications shown by certain taxa, either due to environmental deterioration (Lotus corniculatus, Sedum sp.) or to changes in meteorological conditions (Castanea sativa, Rubus sp.). Finally, a study of the pollen of honeys from storage to collection demonstrates a higher presence of late-flowering taxa (Castanea sativa, Rubus sp.), in the final spectrum as compared with others which are collected by honey bees, but used mostly for colony survival, and which are, therefore, scantly represented in the final spectrum (e.g. Brassica sp.).