• Title/Summary/Keyword: Soil mites

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Community Structure and Seasonal Occurrence of Chigger Mites in Soil Around Farmland (경작지 주변의 토양에서 털진드기류의 군집구조와 계절별 발생소장)

  • Kim, Myoung Hai;Byung Chan Kang
    • The Korean Journal of Ecology
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    • v.19 no.1
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    • pp.31-37
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    • 1996
  • The chigger mites known as the vectors of Tsutsugamushi disease seriously increased due to the expansion of their habitats by the change of farmland into idle land, arboreta and golf courses with the progress of industrialization. These mites were surveyed for their nymphs in soil of four areas located in the northern part of Kyonggido known as the outbreak areas of Tsutsugamushi disease. Total number of the chigger mites collected in the soil of four surveyed areas was 2576, and two genera and ten species including Leptotrombidium palpale were indentified. Among them L. pallidum was the dominant species with the highest occurrence rate of 62 percent. Nine species occurred on the bank of Changrungchon that has been idled for more than ten years, but six or seven species occurred in Wonhundong and Ilsandong that hans been idled for less than five years. The number of individuals collected was also higher in Changrungchon than the other sites. Seasonal occurrence of these mites showed a peak with 166 mites in November on the west slope and another with 192 mites in February on the east slope of the bank of Changrungchon, but none in June. Component ratio of individual numbers for L. palpale, L. pallidum, L. orientalis and L.scutelaris were 19, 62, 9 and 3 percent, respectively. Individual number of L. pallidum and L. scutelaris appeared to some extent of 397 and 23 mites, respetively.

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Diversity of Oribatid Mites (Acari : Oribatida) in Namsan and Kwangreung Deciduous Forests (남산과 광릉 활엽수림지역의 날개응애류(Acari : Oribatida) 종 구성)

  • 정철의;이준호;배윤환;최성식
    • The Korean Journal of Soil Zoology
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    • v.3 no.2
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    • pp.91-105
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    • 1998
  • This study was conducted to analyze oribatid mites communities in deciduous forests in Namsan and Kwangreung on which different levels of environmental stresses might press, and to select potential condidate of biological indicator species. In overall, pH was lower in soil than in litter layer. Also soil pH, total nitrate content and soluble sulfate content were significantly higher in Namsan than in Kwangreung (p<0.05). The flora in Namsan and Kwangreung deciduous forests were dominated by Quercus mongolica, and Carpinus laxiflora respectively. It indicated that Namsan was in the lower stage of the floral succession. The number of species of oribatid mites was significantly higher in Kwangreung (39 families, 65 genera and 114 species) than in Namsan (32 families, 53 genera and 89 species) (p<0.05). Common species found in two regions were 77 species. Mean density of oribatid mites was 1.8 times higher in Kwangreung than in Namsan and this difference came mainly from litter layer. Among correlation analyses between environmental factors and oribatid mites density and species number, only density was negatively correlated with fresh litter depth in Namsan litter layer (r=-0.89, p<0.05). The pH which was considered to affect distribution of oribatid mites didn't show significant results.

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Eriophyid Mites Associated with Lycium chinese Mill in Korea (한국의 구기자에 기생하는 혹응애)

  • Lee, Won-Koo
    • The Korean Journal of Soil Zoology
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    • v.11 no.1_2
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    • pp.13-15
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    • 2006
  • This report concerns with three species of eriophyid mites on Licium chinensis in Korea. Of them, the external morphology of Aceria tjyingi (Manson 1973) was observed with Scanning Electron Microscope. The author reviewed three species of Korean eryophid mites and suggests Korean names of Aceria kuko kishida, A. macrodonis Keifer, and A. tjyngi (Manson), respectively.

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Soil microarthropods in pasture at Unbong, Namwon city (운봉지역 목초지의 토양미소절지동물)

  • 권용립
    • The Korean Journal of Soil Zoology
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    • v.3 no.2
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    • pp.72-77
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    • 1998
  • This study was carried out to investigate the composition of soil microarthropods in pasture at the Unbong Area, to fulfil this purpose, samples were taken from National livestock research institute Namwon branch from 24. June, 1998 to 18. Setember. The results of this study were as follow. Collembola was hight in cattle and goat pasture, and Acarina was hight in wild and gathering pasture. Oribated mites were also hight in wild and gathering pasture more than cattle and goat pasture. Oribatid mites as a vectors of cestodes were identified 7 species of Carabodes peniculatus, Carabodes sp., Scheloribates laevigatus, Scheloribates latipes, Scheloribates rigidisetosus, Galumna cuneata and Galumna sp. The diversity indices showed hight in wild and gathering pasture. According to the MGP analysis I was type GP, and analysis II was type P.

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Diversity of Oribatid Mites (Acari : Oribatida) in Namsan and Kwangreung Coniferous Forests (남산과 광릉 침엽수림지역의 날개응애류(Acari : Oribatida) 종 구성)

  • 박홍현;이준호;배윤환;최성식
    • The Korean Journal of Soil Zoology
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    • v.3 no.2
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    • pp.78-90
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    • 1998
  • This study was carried out from May 1993 to October 1994 to examine diversity of oribatid mites in Namsan and Kwangreung coniferous forests, which were considered to receive different degrees of environmental pressures. Also, environmental factors (pH of soil and rainfall, litter depth, organic matter) were recorded in the two forests. The pH of soil and rainfall were not different between the two forests, but litter depth and organic matter were significantly higher in Namsan than in Kwangreung (p<0.05). The dominant families (>5% of the total densities) were Scheloribatidae(27.3%), Galumnidae(13.4%), Oppiidae (9.9%), Hypochthonidae(7.6%), Suctobelbidae(6.6%), Euphthiracaridae(5.9%) in Namsan and Ceratozetidae(25.9%), Mycobatidae (14.2%), Oppiidae(14.2%), Galumnidae(11.4%), Astegistidae(8.7%) in Kwangreung. The numbers of species were significantly higher in Kwangreung (103 spp.) than in Namsan (74 spp.)(p<0.05). The total densities of oribatid mites were more abundant in Kwangreung (8,709 ind.) than in Namsan (5,899 ind.) and the difference was significant for density in litter layer (p<0.05).

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A Taxanomic study on the Family Bdellidae (Bdelloidea : Prostigmata) in Korea (한국산 코응애과(전기문목 : 코응애상과)의 분류학적 연구)

  • 이원구;임재원;이소영
    • The Korean Journal of Soil Zoology
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    • v.2 no.2
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    • pp.65-75
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    • 1997
  • This study includes the taxanomy, description and a key to species of mites in the family Bdellidae from Korea. Specimens were collected at 60 localities in Korea from January, 1994 to June, 1997. As a result of this study, the following 7 species were identified : Bdella longicornis ( Linnaeus, 1758), Bdella muscorum Ewing, 1909, Cyta latirostris (Hermann, 1804), Biscirus thori Womersley, 1933, Spinibdella tenurostris (Ewing, 1914). Six species excluding Bdella muscorum of them are newly recorded from Korea.

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