G. it. Ent., 3 (14): 229-256
December 31, 1986
Zonazione altitudinale e caratteristiche strutturali
di coleotterocenosi fitosaprobie in un settore
dell'Alta Valle Seriana
(Lombardia, prov. Bergamo)
di
ALESSANDRO FOCARILE
Abstract - Altitudinal zonation and structural characteristics of phytosaprobius coenoses of Coleoptera in the Upper Seriana Valley (northern Italy, Lombardy, Bergamo District) - A transect has been established from 700 up to 1750 m a.s.l. through the vegetation belts, respectively: 1) the riparian woods (Alnetum incanae); 2) the mixed broad-leaves woods (Acer, Corylus, Tilia, Fraxinus); 3) the beech-woods (Fagus); 4) the mixed woods of subalpine conifers (Abies, Picea); 5) the Alnetum viridis shrubs. Thanks to the homogeneous collecting-techniques, more than 600 specimens representing some 56 species of 13 families were collected. The phytosaprobius coenoses 1) and 5) are impoverished as a consequence of the marginal aspects of the surveyed territory. From 800 up to 1750 m a.s.l. the "index of Staphylinidae" regularly rises; this confirms the trend already observed studying similar coenoses in the southern Alps. The interpretation of data was supported by several samplings of fauna gathered in various types of woods, from Quercus ilex- up to Pinus cembra-belt, in different Italian regions.
