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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 12, Issue 4 - Aug 1989
Volume 12, Issue 3 - Jun 1989
Volume 12, Issue 2 - Apr 1989
Volume 12, Issue 1 - Feb 1989
Selecting the target year
Difference of Suaeda japonica Populations from two Different Habitats in Sorae, Incheon, Korea
Lee, Kun-Seop ; Oh, Kye-Chil ;
The Korean Journal of Ecology, volume 12, issue 3, 1989, Pages 133~144
The morphology and flowering time of two Suaeda japonica populations from different habitats, the creek and the bank of the mudflat in Sorae, were surveyed. And standard transplantation and reciprocal transplantation were carried out to determine whether their characteristics were genetically fixed or not. Also soil sample of these habitats were analyzed. The amounts of loss on ignition, maximum field capacity, total nitrogen, exchangeable calcium and potassium, and soluble phosphorus were found to be significantly different between two habitats. Leaf thickness, leaf width, leaf length, stem height number of branches, and number of seeds were significantly different between plants of two populations. And flowering times of two populations did not overlap. According to the results of transplantation, leaf width, leaf thickness, and flowering times were the same as those at their original habitat. But the stem lenght, leaf lenght, number of branches and unmber of seeds were not. Therefore, the differences in the leaf length, leaf thickness, and flowering time seemed to bo genetically fixed. It were suggested that the creek bank populations of Suaeda japoinica were to be considered as different ecotypes.
Phytosociological Study on the Vegetation of Daehuksan Island
Kim, Chul-Soo ; Jang, Yoon-Seok ;
The Korean Journal of Ecology, volume 12, issue 3, 1989, Pages 145~160
Daehuksan Island (125°23'-125° 28' E and 34°37'-34°42' N, ca 19.7㎢) in the southwestern part of Mokpo, Korea, is a part of the Dadohae National Marine Park. Most of the actual vegetation of the island is substitutional vegetation under various human impact such as grazing, cutting for firewood. And natural vegetation is partially distributed in the tutelary shrine forests, deep valleys, etc. During 1987, phytosociological investigation of this was carried out on the basis of Braum-Blanguet's method. The forest vegetation was classified into 1 association and 7 communities, Camellia japonica, Machilus thunbergii, Ardisio-Castanopsietum sieboldii, Daphniphyllum macropodum-Quercus acuta, Pyrrosia lingua-Pinus densiflora. Rhododendron mucronulatum-Pinus thunbergii, Carpinus coreana, and Psedosasa japonica community. Grassland vegetation was classified into Gleichenia japonica, Gleichenia dichotoma, Arundinella hirta-Miscanthus sinensis, Artemisia princeps var. orientalis. Imperata cylindrica var. koenii Artemisia princeps var. orientalis-Pennisetum alpecuroides, Carex boottiana, and salt marsh vegetation. Thypa orientalis, Spergularia marina, Phragmites communis, Carex scabrifolia, and Triglochin maritimum community. Based on them, the actual vegetation map was made in 1:50,000 scale.
Phytotoxic Effects on selected Species by KDICical Substances of Artemisia Princeps var. orientalis
Yun, Kyeong-Won ; Kil, Bong-Seop ;
The Korean Journal of Ecology, volume 12, issue 3, 1989, Pages 161~170
To verify allelopathic effects of Artemisia princeps var. orientalis, a number of laboratory experiments have been performed. Aqueous extracts of leaves, stems and roots of the above species inhibited the seed germination and seedling growth of experimental species, receptor plants. In general, the higher was the concentration of the extracts, the lower was the germination and the growth ratio. Volatile substances released from leaves of the donor plants also inhibited the seed germination and the radicle elongation of receptor plants. Therefore, to find out the inhibitory substances emitted from the wormwood, gas chromatography was employed. As a result of the analysis, 17 KDICical substances were isolated from the leaves and most of them were identified as phenolic compounds.
Clonal Growth and Shoot Modules Dynamics of Phragmites longivalvis in a Reclaimed Land
Choung, Yeon-Sook ; Kim, Joon-Ho ;
The Korean Journal of Ecology, volume 12, issue 3, 1989, Pages 171~182
The structure, clonal grwoth, shoot modules dynamics and rhizome respiratory rate of the Phragmites longivalvis circular patch were studied in a 15-year-old reclaimed land on Mado of the western Korea for two growing seasons. Clonal growth by P. longivalvis resulted in subpopulations of shoot modules which may be separated into pioneer, mature and senile growth phase. The radial growth of circular patch was 208 cm per a year. The shoot phytomass, shoot height and spike frequency were the lowest in the senile phase, and were the highest in the mature phase. The maximum shoot phytomass of pioneer, mature and senile phase in August was 347, 536 and 195g/
for the first year, and 609, 748 and 248g/
for the second year, respectively. The birth rates of shoot modules were the highest during the early spring. Of all modules, the percemtage of spring cohort of pioneer, mature and senile growth phase were 52, 82 and 70% for the first year, and 83, 88 and 85% for the second year, respectively. The flowering shoots were only derived from spring cohorts. The death rates of shoot modules of the pioneer and mature phase were the highest in October. The module is an annual semelparous plant though the genet is a perennial iteroparous plant. Their survivorship curve was negatively (Deevey type I). The density of shoot modules of the pioneer, mature and senile growth phase increased as much as 4.0, 1.6 and 2.3 times for one year, respectively. The respiratory rate was the highest in the lowest in the senile growth phase.
Soil Microarthropods at the Kwangyang Experiment Plantation(2. Population Density and Biomass of Soil Microarthropods
Kwak, Joon-Soo ; Park, Seong-Sik ; Kim, Tae-Heung ;
The Korean Journal of Ecology, volume 12, issue 3, 1989, Pages 183~190
This study was carried out to investigate the population density and biomass of soil microarthropods in the forests with different flora. soil microarthropods of 29,475 individuals were identified into 6 different classes, and 18 different orders. Acarina were the most numerous with abundance of 74.8% followed by 17.9% of Collembola, comprising 92.7% of arthropod fauna. Similar dominance of the two groups was found also in biomass although the level reaching no more than 63.9%. The A/C ratio in the broad-leaved forests are higher than that in the coniferous forests.
Soil Microarthropods at the Kwangyang Experiment (3. Relationship between Soil Oribatid Mite and Vegetation)
Kwak, Joon-Soon ; Kil, Bong-Seop ;
The Korean Journal of Ecology, volume 12, issue 3, 1989, Pages 191~202
This study was carried out to investigate the relationship between soil mites(Acarina:Cryptostigmata) and vegetation in sampled area. From July 1984 to June 1985, samples were taken monthly from coniferous forests; a pinenut (Pinus koraiensis S. et Z.) forest (site C-1), a whitepine(Pinus strobus L.) forest (site C-2), a needle fir tree(Abies holophyla Max.) forest (site C-3), and three broad-leaved forests; site B-1, B-2, and B-3 in Cholanamdo province, southerm part of Korea. Vascular plants of 152 species belonging to 115 genera (53 families) were identified. The flora in the coniferous forests were more diverse than in the broad-leaved forest. Similarity coefficient to the flora was shown highly between the neighbouring sites. The oribatid species in the coniferous forests were more diverse than those in the broadleaved forests. The similarity index suggested that oribatid mites in those surveying sites could be divided into "coniferous forest type" and "broad-leaved forest type".d forest type".uot;.
Soil Microarthropods at the Kwangyang Experiment Plantation (4. Diversity of Soil Microarthropods in Relation to Environmental Factors)
Kwak, Joon-Soo ; Park, Joung-Sik ; Park, Nou-Poung ; Park, Seong-Sik ; Kim, Tae-Heung ; Kim, Tae-Young ;
The Korean Journal of Ecology, volume 12, issue 3, 1989, Pages 203~208
This study was objected to figure out the soil microarthropod fauna in forests with different flora, and to elucidate how environmental factors affect the diversity of soil microarthropods. Relationships between the distribution density of soil microarthropods and environmental factors were correlated positively with organic matter and C/N ratio. By the calculation of the contribution coefficients, organic matter, amount of precipitation, C/N ratio, and soil moisture were found to be major environmental factors that affect the distribution of soil microarthropods.