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LEAF-BEETLES FROM THE AREA BISTRIłA BÂRGĂULUI- COLIBIłA- PIATRA FÂNTÂNELE (NE ROMANIA) Table 1. (continued) Nr. Crt. Subfamily/ species Date Nr. Ind. IX. Cassidinae Gyllenhal, 1813 63 Cassida (Odontionycha) viridis 04.05 5 Linnaeus, 1758 64 Cassida (Cassida) rubiginosa O.F. Muller, 1776 65 Cassida (Cassida) stigmatica Suffrian, 1844 66 Cassida (Cassida) vibex Linnaeus, 1767 67 Cassida (Cassida) pannonica, Suffrian, 1849 68 Cassida (Cassida) prasina Illiger, 1789 24.05 24.05 24.06 24.06 28.07 24.06 29.07 14 3 4 2 1 1 1 Rel. ab. % 0,96 2,71 0,58 0,77 0,38 0,19 0,19 0,19 Place of capture/ habitat -BistriŃa Bârgăului alluvial forest with Salix and Alnus - Şoimului de sus, valley, hyg. veg. - Şoimului de sus, valley, association with Coryllus . - Şoimului de sus, valley, hyg. veg. -Tăul Zânelor, on herbs -MiŃa, hyg. veg. on Dălbidan valley -Tăul Zânelor, on herbs -Popasul Şoimului, alluvial forest with Salix and Alnus, Barber traps 26.06 1 0,19 - Piatra Fântânele, mezo-hyg. veg. 24.05 1 0,19 -Popasul Şoimului, alluvial forest with Salix and Alnus 23.05 1 0,19 -ColibiŃa, grazed lawn -Piatra Fântânele, grazed lawn 26.06 1 0,19 29.07 1 0,19 -ColibiŃa, mez.lawn, Barber trap Abbreviations: Nr. Crt.= current number; Nr. Ind.= number of individuals; Rel. ab.= relative abundance; hyg.= hygrophilous; mezo-hyg.=mezzo-hygrophilous; veg.= vegetation; mez.= mezophilous; S.= South; sp.= species Reffering to the distribution of the registered species on subfamilies (Fig. 1.), the Chrysomelinae subfamily have had the greatest number of species, indicating the mezophilous to mezzo-hygrophilous character of the majority of the habitats existing in the investigated area. Also great number of species was registered in Halticinae and Cryptocephalinae subfamilies, indicating the prsence of some mezophilous or mezzoxerophilous habitats, areas preffered by the majority of the species of these groups. Concerning the gnera, the best represented was Chrysolina genus (Fig. 2.) with a large variety of sub-genera (see also Table 1.), followed by Cryptocephalus, Cassida and 39
A. CRIŞAN Longitarsus, showing the presence both of mezzo-hygrophilous and mezzo-xerophilous habitats, as well as typical mezophilous ones. Important is the fact that, over the presence of some common genera, also rare ones for the country’s fauna are present, like Hydrotassa, Sclerophaedon, Sphaeroderma, Dibolia. This fact accentuate the ecoprotective value of the researched zone. 30 25 20 15 10 5 0 Donaciinae Orsodacninae Criocerinae Clytrinae Cryptocephalinae Chrysomelinae Galerucinae Halticinae Cassidinae Fig. 1. The distribution on subfamilies and number of species of the leaf-beetles registered in the area BistriŃa Bârgăului-ColibiŃa- Piatra Fântânele. Reffering to the leaf-beetle biodiversity in different habitats of the studied area, (Fig. 3.) we registered a spread of the species on habitats in accord with the different ecological demands of each leaf -betle species or group. Having in mind the ecological characteristics of the habitats existing in the area, as we expected, the greatest number of leaf –beetle species was registered in the herbous vegetation along the Soimului de Sus valley (see column”d” in Fig. 3.), where the plant biodiversity was also great, like in the mezophilous lawn from the Piatra Fântânele zone (column „p”, Fig. 3.).Other types of habitats are also important as ecological refuges for different rare or endemic species, even the number of species here registered was not so great. So was for example the case of the hygrophilous vegetation in the spruce forest in Piatra Fântânele area (column “n” Fig. 3.), where the rare endemic species Sclerophaedon carpathicus found the best life conditions. 40
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