Eur. J. Entomol. 104 (3): 489-495, 2007 | DOI: 10.14411/eje.2007.069

Variation in dung beetle (Coleoptera: Scarabaeoidea) assemblages with altitude in the Bulgarian Rhodopes Mountains: A comparison

Jorge M. LOBO1, Evgeni CHEHLAROV2, Borislav GUÉORGUIEV3
1 Departamento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales, C.S.I.C., Madrid, Spain; e-mail: mcnj117@mncn.csic.es
2 Institute of Zoology, BAS, Blvd. Tzar Osvoboditel 1, 1000 Sofia, Bulgaria
3 National Museum of Natural History, BAS, Blvd. Tzar Osvoboditel 1, 1000 Sofia, Bulgaria

Variation with altitude in the composition of dung beetle assemblages and species richness was measured by sampling in spring, summer and autumn, both manually and with pitfall traps at twelve localities in the western Rhodopes Mountains. Non-parametric estimates indicate that most of the regional species pool was collected, some 73% of all taxa previously recorded in the entire region. The rate of species richness decrease with altitude is around 11 species per km, with an evident altitudinal change in the incidence of two main dung beetle functional groups in which Aphodiinae species begin to dominate Rhodopes assemblages at around 1400-1500 m. Species richness of dung pats is dominated by Scarabaeinae in spite of the fact that the number of Aphodiinae species is highest at each locality. Thus, Aphodiinae species are the main contributors to both local and regional pool richness and to species turnover between localities. These characteristics are similar to those observed in the assemblages from another European mountain range, also located near the Mediterranean-Eurosiberian boundary, the Iberian Central System. These results suggest that eastern European dung beetle assemblages are similar in compositional turnover and species richness variation with altitude to that observed in western Europe and North America.

Keywords: Dung beetles, Scarabaeoidea, altitudinal variation, Rhodopes Mountains, European mountain assemblages, species richness

Received: September 18, 2006; Revised: January 26, 2007; Accepted: January 26, 2007; Published: July 25, 2007  Show citation

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LOBO, J.M., CHEHLAROV, E., & GUÉORGUIEV, B. (2007). Variation in dung beetle (Coleoptera: Scarabaeoidea) assemblages with altitude in the Bulgarian Rhodopes Mountains: A comparison. EJE, 104(3), 489-495. doi: 10.14411/eje.2007.069
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