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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Korean Journal of Ecology
Journal Basic Information
Journal DOI :
The Ecological Society of Korea
Editor in Chief :
Volume & Issues
Volume 17, Issue 4 - Aug 1994
Volume 17, Issue 3 - Jun 1994
Volume 17, Issue 2 - Apr 1994
Volume 17, Issue 1 - Feb 1994
Selecting the target year
Effects of Carbon, Nitrogen, Phosphorus, and Biocides on Phosphorus Adsorption in Highly Weathered Soils
Lee, Do-won ; Carl F. Jordan ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 425~434
After two highly weathered soils were treated with glucose, ammonium nitrate, monobasic potassium phosphate and biocides, and incubated for 4 or 6 weeks, adsorption tests were carried out to determine their effect on P adsorption. Glucose addition generally decreased P adsorption. The addition stimulated microbial activity, which might contribure to the reduced adsorption, probably through chelation and anion competition. Consistent endency was not observed with N treatment. Addition of P initially decreased P adsorption, probably through blockage of adsorption sites. Biocides generally decreased adsorption, probably because the microbes that 몬 been killed. Soil 1 with naturally lower levels of C and higher levels of aluminium adsorbed more P than soil 2. These results suggest that in highly weathered soils, which are low in available P and high in exchangeable Al, cultivation techniques which increase soil organic matter will also result in higher levels of plant-available P.
Distribution of Aquatic Macrophytes in the Lttoral Zone of Lake Platangho, Korea
Cho, Kang-Hyun ; Kim, Joon-Ho ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 435~442
In the littoral zone of Lake Paltangho, a vegetation map of aquatic macrophytes was constructed to estimate their occupied area, and the change of abundance of submersed macrophytes was examined along water depth to elucidate niche perferences on the depth gradient. Total area of the littoral zone was 267 ha, of which submersed, emergent and floating-leaved macrophytes covered 155ha, 103 ha and 10ha, respectively. Submersed macrophytes were distributed within a water-depth of 2.5m, with an apparent pattern of zonation: Vallisnaria gigantea and Ceratophyllum demersum at the deeper water depth of 1.5~2.5m.
Forest Vegetation in Mt. Chongok and Mt. Tuta
Pail, Weon-ki ; Lee, Woo-Tchul ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 443~452
A phytosociological study of the forest vegetation was carried out in Mt. Chongok and Mt. Tuta from June, 1992 to August, 1993. The forest vegetation was classified into 1 order, 2 alliances, 1 suballiance and 4 communities; Vaccinium hirtum v. koreanum-Quercus monogolica community, Carex humilis v. nana-Pinus densiflora community, Sasa borealis-Carapinus laxiflora community, Plectranthus inflexus-Quercus variabilis community. Actual vegetation map was drawn in 1:25,000 scale.
Population Dynamics of Symplocarpus renifolius 1. Population Structure and Vegetative Growth
Min, Byeong-Mee ; Kang, Hyun-Jung ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 453~461
Size class structure and vegetative growth of a perennial herb of the temperate deciduous forests, Symplocarpus renifolius Schott, were studied from 1991 to 1994 in Namhansansung, Kyonggi Province, Korea. The size class structures of leaf number and leaf area per individual followed bell-shape curve, i.e. frequency of middle class was relatively high. The leaf area increased from the late-March to mid-May. At the end of the growing season, leaf area(length X breadth) was proportional to biomass, especially aboveground biomass. The leaf number and leaf area per individual increased at the rate of 0.08 leaf/year and 9.7
, respectively. The size of the individuals in large-sized classes, in leaf number and leaf area, decreased in next year, while the size of the individuals in small-sized classes increased. Therefore, it was concluded that the size class structure of S. renifolius population was largely determined by the growth form.
Population Dynamics of Symplocarpus renifolius (2. Seed production)
Kang, Hyun-Jung ; Min, Byeong-Mee ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 463~469
For better understanding of population dynamics of Symplocarpus renifolius, some aspects of seed production were studied in natural populations for 3 years. The rate of reproducing plants (RP) was 8.06% among the whole studied. The RPs were 0.0% in leaf size class under 500cm2 per individual, and 3.6% in 500~1,000cm2, and 44.3% in over 3,000cm2. The resource allocated to sexual organ was 11.6% of total biomass at the end of growing season, and that to belowground was about 80% regradless of presence or absence of sexual organ. In the previous and the next years of seed production, the energy allocated to sexual organ didn't affect the changes of leaf size, year by year. After flowing season. Especially, a large number of sex organ were degraded in April, a period of pollination and fertilization. The number of seeds per individual was degraded in April, a period of pollination and fertilization. The number of seeds per individual was 13~22 and didn't relate to leaf size. But the weight per seed increased along leaf size per individual. Therefore, in S.renifolius population, large individual produced large seeds rather than many seeds.
Classification Analysis and Gradient Analysis on the Forest Vegetation of Mt. Mudung
Kim, Chang-Hwan ; Kang, Seon-Hee ; Kil, Bong-Seop ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 471~484
The forest vegetation types and their structural characteristics in Mt.
were investigated by classification method and ordination method. The forest was classified into 7 communities by ristic composition table: Quercus monogolica community, Q. serrata community, Q.acutissima community, Q.variabilis community, Q.dentata community, Pinus densiflora community and Frainus mandshurica community. Considering the moisture gradient, two kinds of distributuin pattern were shown as follows; F. mandshurica, Q. acturissima, Platycarya strobilacea and Staphylea bumalda were distribute at moist habitats, while Q. monogolica, P. densiflora and Q.variabilis at dry habitats. In continuum analysis, each population occupied different distribution area but it was continuously overlapped. On the successional trends of tree species, it is postulated that Q. mongolica species might dominate the altitudinal zone over 700m.
Variation of the Germination Responses to Temperature of Plantago asiatica Seed Population along Altitude in Mt. Chiri
Lee, Ho-Joon ; Kim, Yong-Ok ; Jeon, Jae-Hee ; Seong, Mi-Seon ; Jang, Il-Do ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 485~499
This study was focused on the effect of the altitude on the geographical variations of germination characteristics in the populations of Plantago asiatica L. distribute in Mt. Chiri. There was a significant difference among the 14 groups in the phenological pattern in relation to altitudes. When the altitude becomes higher, the thermal time which was required for 10 to 80% germination rate showed higher and wider distribution. On the other hand, the germination response of increasing temperature (IT) and secreasing temperature (DT) regime was classified into 3 group. The first group was the spering germination type. This group showed that the IT regime hadhigher germination rate than that of the DT regime, and was distributed in Macheon(300m) and Packmudong (500m). The second was the spring-fall germination type which was distributed in Hadong (900m) and Saemt대 (1100m). This group also showed higher germination rate in the IT regime, but the difference of the germination rate between IT and DT regime was less than that in the first group (the spring type). The third group was the early fall germination type which was found in the Nogodan (1507m), Changetomok (1750m) and Cheonwangbong (1915m). The germination rate of this group showed almost 100% similarity between IT and DT regime. These data suggested that the geographical varations of germination characteristics within species was an important ecological strategy for the survival from severe environmental conditions.
Dynamics of Nutrient and KDICical Constituents during Litter Decomposition
Mun, hyeibg-Tae ; Jae-Hoon Pyo ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 501~511
Dynamics of nutrients, non-polar, water solubles, acid solubles and acid insolubles (lignin) in decomposing litter were investigated for 2 years in the oak, Quercus acutissima, and the pitch pine, Pinus rigida, stands in the vicinity of Kongju, Chungnam Province. Nitrogen and phosphorus conetrations in decomposing litter increased with time elapsed, however, potassium decreased rapidly within three months and then remined constant with time elapsed. Calcium concentration in needle litter during experimental period was lower than that of initial concentration in needle litter during experimental period was lower than that of initial concentration, and showed no significant variation with time elapsed. Calcium concentration in oak litter during the experimental period, however, were higher than that of initial concentration. Magnesium concentration in oak litter decreased repidly during six months, and then remaines constant thereafter. Annual amount of nitrogen, phosphorus, potassium, calcium and magnesium which returned to soil via litter decomposition in the oak and the pitch pine stands was
for Mg, respectively. Non-polar, and water- and acid-soluble fractions in decomposing litter decreased and lignin increased with time.
Distribution Pattern of Principal Species in the Mantle Community
Jung, Yong-Kyoo ; Jong-Won Kim ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 513~521
Distribution patern of 30 species that are occurring predominantly in the mantle communities (Mantelgesellschaften) in South Korea was studied. The study was arried out by geographic and bioclimatic analysis on 368 releves obtained from the Zurich-Montpellier School's method, which involves direct analysis on the latitude, altitude, annual mean temperature and the lowest temperature of the site. Rosa multiflora and Pueraria thunbergiana which are regarded as repersentative pioneer species to the mantle community has the highest frequency, 70.1% and 60.3%, respectively. Three distribution patterns were recognized, i.e. northern type, central type and southern type, and each type was characterized by horizontal and altitudinal amplitude. Their concetrate distribution ranges on the annual mean temperature were 8~11℃, 9~12℃ and 10~13℃, respectively. It was recognized that tendencies of overlapping and continuous distribution pattern of the types and species exist. Geographically, the souther limit f the northern type is 35.5。N and the northern limit of the southern type 37.0。N. The central type is located at an coincided with the previous study in which cool-temperate forests were synchorologically indentified into northern/altimontane, certral/montane and southern/submontane type. The subsidiary knowledges from this study will provide practical information on the constructuin of the fence plant community for environmental conservation.
The Growth, Seed Germination and Anticancer Effect of Hedyotis diffusa
Lim, Ung Kyu ; Seon-Ho Kim ; Ho-Joon Lee ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 523~531
Optimal conditions for the seed germination and growth of Hedyotis diffusa were studied. As photoperiod was increased from 12 hr to 24hr, the germination rate of Hedyotis diffusa was gradually increased. The photoperiod and temperature inflenced on the fermination synergistically. After the growth of 20 weeks under the natural condition (June~Oct.), the length of H. diffusa was
(15.5~52.5cm), and total dry weight per
. It is considered that H. diffusa could be cultivated in a part of inland. The anticancer effect of H. diffusa extract was examined. F-344 rats aged 6 weeks were divided into 3 groups and were given an I.P. of diethylnitrosamine at 200mg/kg body weight as a promoter, initially. And in two weeks after the beginnign of the experiment, group 1 was supplied iwth feed containing 0.02% 2-AAG as a promoter for 6 weeks. Group 2 was supplied with feed containing extracts of H.diffusa (0.02%) for two weeks. Group3 was supplied with only basal diet. All rats were sacrificed for partial hepatectomu, and the antipromoting effect was examined by the number 문 area per
of foci in river. In group 1, the number of hyperplastic nodule was
, but in group2, it was drastically reduced to
rather thn those of group1. The total area of nodules
of group 1 and group2 were
, respectively. These results indicate that extract of H.diffusa act as an anticancer agent at statistically significant level (p<0.001).
Studies on the Environmental Factors for Sap Exudation of Acer mono and the Resource Development of its Community (2): Environmental Factors and Tree Recovery
Kim, Chul-Soo ; Kwak, Ae-Kyung ;
The Korean Journal of Ecology, volume 17, issue 4, 1994, Pages 533~545
The bleeding of 39 Acer mono trunks by wounding was investigated at the altitudes of 400m, 500m, 800m, and 1100m on Wangsirobong (1,214m), Mt. Chiri area (127°34'E., 35°14'N.) from February 4 to March 21, 1993 and from February 23 to March 23, 1994. The amount of sap in a day was clodely related to the change of air temperature and wind speed. Especially, the abundant sap was exudated at the ranges of -4~13℃ in the daily range of temperature and it was below 0.14m/s in wind speed. The most abundant bleeding was exudated from Acer mono trunk located south facing slope in 800m altitude. Also the amount of sap increased with incereasing suface area of crown. The maximum bleeding of sap was collected from the hole punctured at 80cm height from the ground surface at southern part of the trunks. And the number of exudation holes had an important effect on bleeding of sap but the number of holes should be controlled by DBH of trunks. These results suggested that the exudation was influenced by the daily range of temperature and wind speed. And the altitude, direction of sloped where the trees occurred, surface area of crown, the number of exudation holes, height form the ground surface and the direction of the hole was 91.6% when germicide (Dimethyl-4,4' -ophenylene bis 3-thio alonate) was treated from April to October after bleeding of sap in the year.