tailieunhanh - Báo cáo lâm nghiệp: "The role of Hylastes cunicularius Erichson (Coleoptera: Scolytidae) in transferring uropodine mites in a mountain spruce forest"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: The role of Hylastes cunicularius Erichson (Coleoptera: Scolytidae) in transferring uropodine mites in a mountain spruce forest. | JOURNAL OF FOREST SCIENCE 56 2010 6 258-264 The role of Hylastes cunicularius Erichson Coleoptera Scolytidae in transferring uropodine mites in a mountain spruce forest B. Krsiak P. Zach J. Kulfan Department of Animal Ecology Institute of Forest Ecology Slovak Academy of Sciences Zvolen Slovakia ABSTRACT The bark beetle Hylastes cunicularius was studied in the Tatra Mountains West Carpathians to clarify its role in transferring phoretic uropodine mites during dispersal in a mountain spruce forest. Emphasis was placed on the proportion of beetles vectoring deutonymphs of uropodine mites and on assemblage structure frequency distribution and placement of uropodids on the bark beetle vector. A total of 3 302 adults of H. cunicularius were caught into flight interception traps of which 529 16 vectored a total of 1 020 individuals and four species of uropodine mites Trichouropoda pecinai Hirschmann Wisniewski Trichouropoda obscura Uroobovella vinicolora Vitzthum Uroobovella ipidis Vitzthum . The uropodine mite assemblage was dominated by T. pecinai which represented of the collected mite individuals. T. pecinai and U. vinicolora were documented as new associates of H. cunicularius. Frequency distribution of uropodids on the beetle was L-shaped. The number of vectored mites and the number of dispersing individuals of H. cunicularius were positively correlated. Keywords Hylastes cunicularius mountain spruce forest uropodine mites West Carpathians Bark beetles Coleoptera Scolytidae are ecological factors triggering tree and forest decline Berryman 1986 Christiansen Bakke 1988 Schelhaas et al. 2003 . They are vectors phoronts of numerous mite species transmitting tree pathogens mycangial symbionts and fungal antagonists of bark beetles Moser et al. 2005 . Uropodine mites Acarina Mesostigmata Uropodina are typical representatives of phoretic mites on bark beetles. Their knowledge in forest ecosystems is primarily connected with the bark beetle species of .