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- 저자 : Kôhei Kubota (검색결과 3 건)
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Kôji Sasakawa,김중락,김종국,Kôhei Kubota 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.1
To investigate the history of differentiation of the Pterostichus raptor species group of carabid beetles, endemic to the Korean Peninsula and adjacent islands, we performed cladistic analyses based on 30 adult morphological characters for all 12 species of the group and an outgroup species. The resultant tree revealed threemonophyletic cladeswithin the group, each ofwhich is composed of 3–6 parapatric or allopatric species; the three clades occur sympatrically in most parts of the peninsula. Reconstructions of geographic range history on the obtained tree showed that the initial divergence of the three clades occurred in the TaebaekMountains and that each clade subsequently dispersed southward and speciated after that dispersal.
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Kôji Sasakawa,김정락,김종국,Kôhei Kubota 한국응용곤충학회 2013 Journal of Asia-Pacific Entomology Vol.16 No.4
A flightless carabid beetle, Pterostichus bellatrix (Tschitschérine, 1895),which is endemic to the Korean Peninsula,had been thought to comprise two subspecies: the nominotypical subspecies distributed in northern and central parts of the peninsula, and the subspecies P. bellatrix togyusanus Park and Kwon, 1996, distributed in the southern part of the peninsula. A recent study upgraded these two subspecies to species level, but no convincing evidence was provided for this taxonomic change. Our comparative morphology of external and male genital characters revealed that these two species are paraphyletic with respect to Pterostichus syleus Kirschenhofer, 1997, which was described from Liaoning Province, China. Thus, separate species status of P. bellatrix and P. togyusanus was confirmed phylogenetically. Although P. togyusanus has only been known fromthe type locality, Mt. Deogyusan,we newly record this species from Mt. Jirisan, a mountain located south of the known locality. A revised key to species of the Pterostichus opacipennis species group (=the subgenus Koreonialoe (s. str.) Park and Kwon,1996), which now includes 14 species, is also provided.
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Sonomi Shibuya,Zaal Kikvidze,Wataru Toki,Yasuto Kanazawa,Tatsuya Suizu,Tamio Yajima,Takahiro Fujimori,Mohammad Reza Mansournia,Zuhair Sule,Kôhei Kubota,Kenji Fukuda 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.4
A Satoyama landscape is an important reservoir of biodiversity; however, in post-industrial era traditionalSatoyama management became economically unfeasible. To maintain Satoyama, labor-saving management styles have begun to be implemented. In contrast to thetraditional styles based on labor-intensive practices such as rotational tree clear-cutting, the labor-saving stylesconsist mainly in tree thinning and ground vegetation cutting within a small spatial range. The consequencesof this newapproach are unclear, and our study aimed at filling this gap in our knowledge by analyzing the effectsofsmall scalemanagement on ground beetle community in suburban Satoyama (Kashiwacity, central Japan).Weapplied labor-savingmanagement at limited spatial range, and sampled and analyzed ground beetles both beforeand after management. Cluster analysis revealed three groups of beetle assemblages, corresponding to threehabitats: forest, bamboo stand and grassland. Comparison of wing traits showed that, before management, brachypterousbeetles dominated forest plots and macropterous beetleswere more prominent in the grassland plot,while in the bamboo stand both types of wing morphology were evenly represented. This trend can be linked tohabitat structural stability driven by vegetation regeneration cycleswhich reflect dominant plant longevity. Aftermanagement, macroptery increased in all three habitats. Probably, habitat disturbance created by vegetationmanagement gave advantage to macropterous beetles over brachypterous beetles. These results suggest thatwing type can be linked to vegetation structural stability. In some species, decline in abundance was accompaniedwith decline in body size. Our study shows that small scale Satoyama management can have pronouncedeffects on beetle assemblages.
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