• Asian Journal of Turfgrass Science
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• v.10 no.3
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• pp.187-194
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• 1996

Dictyostelid cellular slime molds were isolated from soils and harks of the subtropical forest of Torreya nucifera in Cheju island. The results were as follows: Polysphondylium pallidum,Dictyostelium purpureum, D. mucoroides, D. aureo-stipes var. aureo-stipes, D. flavidum, D. miniutum, P.violaceu m, D. monocrhasioides. D. brefeldianum, D. polvcephalum. D. areum var. areum, P. tenuissimum, D. fasciculatum. In this forest, P. pallidum and D. purpureum were occurred dominantly, and D. mucoroides and D. aureo-stipes var, aureo-stipes were the second dominant. It was distinguished that D. purpureum was much more cornmonly found than the other forests. Cellular slime molds from the barks of the tree heights of 1,3 and 5m were occured 7, 3 and 2 species respectively. Torreya fruit extract affected on the growth of D. aureo-stipes var. aureo-stipes and D. flavidum but not on D. purpureum and D. mucoroides. Key words: Cellular slime mold, Torreya forest, Torreya fruit extract.

• Asian Journal of Turfgrass Science
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• v.10 no.3
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• pp.213-230
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• 1996

A study of occurrence and distribution of cellular slime molds(CSMs) in forest soils of central areas of Korea was carried out. Samples for CSMs isolation were collected from 4 study sites; Mt.Kyeryong, Mt. Taebaek, Mt. Sobaek and Mt. Sokri. In Mt. Kyeryong, six species were found. These were Dictyostelium fasciculatum, D.firmibasis, D. mucoroides, D. minutum, D. brefeldianum and Polysphondylium pallidum. The average number of species isolated at one site was 0.75, and average density(clones /g soil) was 292. The results of soil sample analyses were that the concentration of Pb was higher than any other areas. In Mt. Taebaek, seven species were found; D. fasciculatum, D.firmibasis, D. mucoroides, D. miuutum, P.pallidum. P. violaceum, P. candidum. The average number of species isolated at one site was 2.3,and average density was 1,108. Based on importance values calculated from study sites within each of three elevation ranges, several of the more widely distributed and abundant species have distribution patterns that show a response to elevation. In Mt. Sobaek, eleven species were found. These were D. fasciculatum. D.firmibasis, D. mucoroides, D. miuutum, D. brefeldianum, D. crassicaule,D. deminutivum, D. implicatum, P. pallidum. P. violaceum and P. candidum. The average number of species isolated at one site was 3, and average density was 793. Species diversity appeared to be the highest in this area. In Mt. Sokri, six species were found. These were D. fasciculatum. D. mucoroides, D. minutum, D. purpureum, P. pallidum. and P. violaceum. The average number of species isolated at one site was 2.4 and average density was 858. It was noticeable that D.purpureum were much more comrnonly found in this pinus evergreen forest. Key words: Cellular slime molds(CSMs), Importance value, Elevation, Average number of species, Average density.

• Asian Journal of Turfgrass Science
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• v.10 no.3
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• pp.195-211
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• 1996

Dictyostelids cellular slime molds were isolated from the soils of Gokneung and Anyang streamside in Korea. The fifteen species including two undescrihed species were identified. These were as follows ; Dictyostelium macrocephalurn D. sphaerocephalum, D. aureum var. aureum, D.mucoroides, D. minutum, Polyspondyium pallidum. D. giganteum, P. violaceum. D. purpureum. D.brefeldianum, D. flavidum, D. mucoroides var. storoniferum, D. septentrionalis, D. aureum var. luteolum,D. aureo-stipes var. aureo-stipes. D. macrocephalum was the dominant species. and D. sphaerocephalum. D. aureum var. avreum were relatively common. D. mucoroides var. storoniferum, D. septentrionalis were the undescrihed species in Korea. In the soils of streamside, dominant species was shifted by D. macrosephalum, D. sphaerocephalum. which were rare in the forest soils. The total clones per gram of streamside soils were greater than that of forest soils, whereas the number of species in streamside was smaller than the in forest soils. As a result, the ratio of the number of clones to species was very high in the soils of streamside, Environmental factors of soil pH, water content, organic content, total nitrogen and total phosphorus made a effect differently on the cellular slime molds community. Key words: Cellular slime molds, D. macrocephalum, D. sphaerocephalum, Shift of dominant species, Environmental factors.

• Asian Journal of Turfgrass Science
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• v.10 no.1
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• pp.81-88
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• 1996

Twelve dictyostelids occurred in the southern coastal area and islands; nine species of genus Dictvostelium and three species of genus Polysphoslylium. In ten sites of evergreen-broadleaved forests, 12 species were identified and average prensent species was 6.0. D. mucoroiles, D. misutum, P. pallilum and P. violaceum were dominant species. The first dominant species was D. mucoroides. Its importance value was 55 and was much more than the others. Especially, for P. violaceum presence was 90%. It was much higher. But relative density was no more than 3%. D. minutum that was not common species had comparahly high im- portance value. In two sites of evergreen conifers, only four species occurred; D. mucoroiles, D. brefeldianum, D. capitatum and P. pallilum Average present species was 2.0. Dominant species was D. mucoroides. Average of total clones in evergreen-hroadleaved forests and evergreen conifers were irrespectively 8,608 and 9,541. As for the number of species, cellular slime molds distributed variably in evergreen-broadleaved forests than evergreen conifers.

• The Korean Journal of Ecology
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• v.21 no.5_2
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• pp.557-565
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• 1998

The occurrence and distribution of dictyostelid cellualr slime molds were investigated in forests of Mt. Paektu. Fourteen species were isolated from forest soils of thirteen sites as follows Dictyostelium minutum, D. brefeldianum, D. crassicaule, D. capitatum, D. mucoroides var. stoloniferum, D. macrocephalum, D. mucoroides, D. septentrionalis, D. purpureum, D. aureo-stipes, P. violaceum, P. pallidum and two unidentified speceis. Mean total clones and species found were 4,415.69 No./g and 2.92, respectively. Dominant species were D. minutum, D. brefeldianum and D. crassicaule in this study area, and first widespread species was D. minutum. All sepecies that found in Mt. Paektu were isolated from forests of South Korea. But dominant species was different from those of South Korea. Total clones and species were more in subalpine Eurya japonica than in low elevated abies nephrolepis. It was thought that distribution of dictyostelids was related to soil microenvironments by vegetation, not or not more elevation.

• Asian Journal of Turfgrass Science
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• v.10 no.1
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• pp.89-101
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• 1996

Seventeen dictyostelids occurred in the southern mountains in Korea. Total clones per site was 7,491 and average number of species was 7.6. Dominant species in the each mountains were as follow; Dityostelium firmibasis in Kayasan, D. minutum in Kyeryongsan, D. firmibasis in Naejangsan, D. brefeldianum in Dukyusan, D. microsporum in Palgougnan, P. pallidum in Tohamnan, P. pallidum in Koryong. However, dominant species was D. brefeldianum in the southern mountains. Average frequency, relative density and presence were impartially high in all sites. It wan not dominant except Dukyusan. And it had not been reported to he common species until now in Korea. D. mucoroides an wan not dominant species in all sites, it wan the dominant species second to D. brefeldianum.

• The Korean Journal of Ecology
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• v.25 no.1
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• pp.51-58
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• 2002

An investigation of occurrence and distribution of dictyostelid cellular slime molds in South Korea were carried out. Thirty-one dictyostelid cellular slime molds were isolated from soils of 256 sample sites of 41 area within mountain forests, riversides, streamsides and coastal area in South Korea. The average number of species isolated at a given study area was 6.85. Based on the distribution value calculated from average frequency and site presence, four dictyostelid species distributed widely in South Korea; Polyspondylium pallidum, P violaceum, Dictyostellium mucoroides and D. minutum. Especially, P pallidum. were found in 30 area and the highest site presence. Eight dictyostelid species was described firstly in this study: D areum var. luteolum, D. delicatum, D. deminutivum, D. implicatum, D. microsporum, D. mucoroides var. stoloniferum, D septentrionalis, and P. candidum.

• Journal of Plant Biology
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• v.33 no.3
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• pp.159-168
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• 1990

The occurrence and distribution of cellular slime molds in major deciduous forests of South Korea were investigated. Ten species were isolated from the soils collected at ten sampling areas and cultured in hay infusion agar with E. coli. These include: Dictyostelium minutum Raper, Dictyostelium mucoroides Brefeld, Dictyostelium lacteum Van Tiegham, Dictyostelium polycephalum Raper, Dictyostelium fasciculutum Traub, Hohl and Cavender, Dictyostelium sp. Polysphondylium pallidum Olive, Polyshpondylium violaceum Brefeld, Copromyxellar sp. and Guttulinopsis vulgaris Olives. Among these species, Dictyostelium sp. and Copromyxellar sp. could not be identified. D. minutum and D. mucoroides occurred the most frequently in almost all the deciduous forests investigated in this study. Dictyostelium sp., D. fasciculutum and Copromyxella sp. occurred only in the north of the central region, but D. lacteum and D. polycephalum were found only in the south of that region. This indicates that distribution of these species may be affected by climate. The number of isolates per sampling site ranged from 2 to 6, averaging 4.3.

• Asian Journal of Turfgrass Science
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• v.10 no.1
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• pp.71-80
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• 1996

Fourteen dictyostelids(12 species of genus Dictyostelium. 2 species of genus Polysphonylium) oc-curred in Mt. Chiri Korea. Soils samples were collected from the nine sites. In the broadleaved-deciduous forests and conifers, common species of cellular slime molds are Dictyostelium mucoroides, and D. brefeldianum. Only two species are above 30 in importance value and above 50% in presence. Dominant species in the broadleaved-deciduous forests is D. mecoroides wheras in the conifer forests is D. brefeldianum which was not common until now in Korea, found in the low elevation either. In addition, Five cellular slime molds occured in the Miscanthus sinensis community: 4 species of genus Dictyostelium and 1 species of genus Polysphonylium. Dominant species is D. purpureum. Importance value is very high, 85. This Result is exceptively unusual. It dind't occur in the other sites. Correlation between the altitudes and the occurrence and distribution of dictyostelids was not accurate. Merely dominant species were different according to forest types and organic matter contents in soil. Cellular slime molds have different favorite forest types. And the growth and germination are dependent on the soil enviroryrnental conditions and soil quility. Key words:Dictyostelids, Mt. Chiri D. mecoroides, D. brefeldianum. D. purpureum. Soil quility, Favorite forest type, Soil environmental condition.

• Asian Journal of Turfgrass Science
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• v.10 no.3
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• pp.247-262
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• 1996

In this study, the distribution of dictyostelid cellular slime molds was investigated from F, H and $A_1$ horizon of pinus, oak forests in Mt. Puk'an, Mt. Nam and Mt. Kwanak. The relationship of cellular slime molds with other soil microorganisms and abiotic factors were analyzed. The six species were isolated as follows: Polysphondlium pallidurn, Dictyostelium purpureum, D. mucoroides, D. crassicaule, D. capitatum, D. implicatum. The dominant species in pinus forests was P. pallidum, and in oak forests it was D. macro ides. In Mt. Nam, D. mucoroides and P. pallidum were isolated at only oak forest. The Correlations of slime mold abundance with bacteria were significant. Even though positive correlations of cellular slime molds with actinomycetes or fungi were not significant, correlations between soil microorganisms were analyzed. Correlation coefficients were high in Mt. Kwanak(r=0.5921) and Mt. Nam(r=0.7243) at significant level P<0.01. There were significant correlations between total slime molds and abiotic factors. It supports that cellular slime molds are limited by foods in nature. In low level of pH, water content and organic matter, that community diversity is more affected by bacteria whose organic degradation capacity is regulated by interactions of soil microorgaisms. Key words: Cellular slime molds, Soil microorganisms, Correlations, Abiotic factors.