Insect pollinators and environmental biodiversity in Forli province: introductory note

Radeghieri, P.; Porrini, C.

Atti XVII Congresso Nazionale Italiano di Entomologia, Udine, Italy, 13-18 Giugno 1994: 867-868


Accession: 002641421

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A wide-ranging survey involving 73 monitoring stations was conducted in 1992-1993 in Forli, northern Italy, to determine the impact of intensive farming operations on wild pollinators. The data collected include the capture of specimens of dubious identification and the recording of sightings in classes. Two sites (each 225 kmsuperscript 2), one north and the other south of the Via Emilia highway, were taken as representative areas of the two opposing concepts of farming. The former area is marked by strong man-made pressures and the latter much less so. The northern zone is clearly more inhospitable to wild pollinators: the genus Bombus is the most impoverished group (absent from 90% of samples taken in the north and from 43% of samples taken in the south), followed by solitary bees (Apoidea) and hoverflies (Syrphidae) (28% and 32% absence ratings in the north, 4.3% and 17.3% absence ratings in the south, respectively). The data indicate that pollinating insects are excellent indicators of environmental biodiversity.