| Species composition of Cerambycidae at different altitudes and vertical vegetation belts of Helan Mountain were investigated from 2013 to 2015 Totally 45 species of Cerambycidae, belonging to 6 subfamilies, 31 genera were collected．Among them, 14 genera 21 species belong to Lamiinae were the dominant subfamilies in the area, accounting for 46.67% of the total number of species 9 genera 12 species belong to Cerambycinae, 4 genera 5 species belong to Aseminae, 2 genera 4 species belong to Lepturinae, 2 genera 2 species belong to Prioninae, and 1 genera 1 species Necydalinae Based on the statistics of the faunal compositions, 17 species belong to Palaearctic origin accounting for 37.78%, including Middle Asia pattern for 35.29%, and 28 species belong to widely distributed pattern, accounting for 62.22% In the insect geographical regions of China, the widely distributed species groups counted for 20%, which are predominant types for 13 distribution patterns. The element of Mongolia Xin play important roles in the cerambycid fauna and were closely related to Northeastern and North of China. Investigation result of vertical distribution patterns showed that the piedmont broad leaved forest zone was most number of longicorn species which 22 species were collected, accounting for 48.89% Number of species of Cerambycidae gradually increased from the low elevation piedmont desert and semi desert zone to the high elevation mountain coniferous forests zone, and Palaearctic component had an increasing trend except mountain grassland zone Cluster analysis showed that species composition and habitats were similar among mountain shrubland zone, mountain sparse forest zone and piedmont broadleaf forest zone, mountain coniferous forests as well as mountain broadleaf and needleleaf mixed forest zone, but species composition of piedmont desert and semi-desert zone and mountain grassland zone were different from other significantly. |
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