Plants-solitary bees relation in urban habitat: the example of the city of Liege [Belgium]
1989
Jacob-Remacle, A. (Faculte des Sciences Agronomiques de Gembloux (Belgium). Unite de Zoologie Generale et Appliquee)
The author analyses the plant choice of 51 solitary Apoidea species (including Halictidae) on a total of 3110 floral visits in some 20 open spaces in the city of Liege (Belgium) (UTM square: FS81). 42 per cent of the 218 visited plants (49 families) are indigenous and the floral visits observed on native plants represent 46 per cent of all visits. They were used by 90 per cent of the Apoidea species, while the non-indigenous flora only attracted 69 per cent of the species. The Asteraceae were the most prefered: they were subject to one third of all visits by 60 per cent of all species. In the studied area, the plants that are visited by the highest number of individuals are Tussilago farfara (7.0 per cent), Ribes sanguineum (6 per cent), Taraxacum (5.3 per cent), Jacinthus orientalis (3.7 per cent), Forsythia x intermedia (3.2 per cent) and Mahonia aquifolium (2.9 per cent). Plants of which the higher number of species were seen are Hypochoeris radicata (12 species), Bellis perennis (11), Taraxacum (11), Daucus carota (9), Solidago (9) and Mahonia aquifolium. The floral preferences for the different families and species are considered. The author quantifies the degree of food specialization of the most observed Apoidea by calculating two different indices.
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