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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 6, Issue 4 - Aug 1983
Volume 7, Issue 3 - Jun 1983
Volume 6, Issue 3 - Jun 1983
Volume 7, Issue 2 - Apr 1983
Volume 6, Issue 2 - Apr 1983
Volume 6, Issue 1 - Feb 1983
Selecting the target year
Computer Simulation of Branching Pattern in Magnolia denudata Desr.
Park, Bong-Kyu ;
The Korean Journal of Ecology, volume 6, issue 4, 1983, Pages 1~9
The observation of branching pattern on Magnolia denudata Desr. was performed from July 1982 to September 1983 and then computer simulation was carried out. Tree crown pattern depends on not genetic factors but also environmental factors and the determination of branchin pattern which characterized it appears to properly explain the relationships such as branching pattern and allocation of materials through the analysis of influence branches under several assumptions. Now that computer simulated simulated pattern was considered as the accumulation of two factors which controled the growth, it was represented as the stimulated tree which differs in branching rate that described allocation of material necessary for the growth of each branch. There was a tendency of allocation ratio of nutrients, i.e. subbranch to main branch to decrease by the passage of year. Under assumption that branch was branched when accumulated material reached 1, it was possible to represent the allocation of nutrients are residual
in subbranch, A(iA, iC)+
in current twig. Like this, the basic minute difference of the allocation of nutrients according to the branch resulted in complicated patterns in the tree crown.
Morphological and Ecological Aspects on the Population of Cobitis koreensis KIM (Pisces, Cobitidae) in the Begehon Stream, Puan-gun, Cholla-bugdo, Korea
Kim, Ik-Soo ; Wan-Ok Lee ;
The Korean Journal of Ecology, volume 6, issue 4, 1983, Pages 10~20
Morphological and ecological comparions are made between specimens of Cobitis koreensis KIM and the geographically restricted population of the Cobitid fish which is found along the Begchon stream, Puangun, Cholla-bugdo province over a 12-month period of 1982 and 1983. The Begchon population is tentatively identified as Cobitis koreensis, but the color patterns and two morphometric proportions differ widely fromthose reported previously for this species. In addition to these character, it is easily distinguished from C. koreensis by the smaller body size, by having the larger egg size and the less egg number in female during the breeding season. As the differentiation of this population is primarily due to geographically isolation, it is supposed that Begchon cobitid population may be an undescribed distinct subspecies of K. koreensis or above the conventional subspecies level.
A Study on the Photosynthesis of Chlorella Symbiotic with Paramecium bursaria
Chang, Nam-Kee ; Jung-Il Cho ; Kwuen-Soo Ha ;
The Korean Journal of Ecology, volume 6, issue 4, 1983, Pages 21~28
The relationship of Paramecium bursaria with its symbiiotic Chlorella was studied in the view-point of photosynthesis and its product movement. The following results were obtained. In 1/10 dilution of bacterized medium green Paramecium grew and survived better than colorless Paramecium. P. bursaria was competitively related to its symbiotic algae as far as the change of total chlorophyll contents was concerned. Therefore, in continuous darkness total chlorophyll contents of green Paramecia decreased proportionally to the time course. Under the condition, on the other hand, that the bacterized medium was not replenished over 10 days, total chlorophyll contents in P. bursaria increased by over 2 times as much as those in normal condition. By means of Oxygen Diometer it was assured that green Paramecium was able to utilize thoitic the great part of oxygen evolved photosynthetically by its symbiotic algae. Also when was given many starch grains were found in symbiotic chlorella through electron micrography. These data suggested that P. bursaria was photosynthetically given lots of benifit by its symbiotic chlorella.
An Investigation on the Flora and Life Form in Mt. Sori
Lee, Nam Suk ; Sung Hee Yeau ;
The Korean Journal of Ecology, volume 6, issue 4, 1983, Pages 33~59
An investigation has been performed on the flora and life form of the vascular plants at Mt. Sori in Kwangneung from March to November in 1982. In a survey field trip, 539 species, 344 genera, 102 families of plants. are collected. Among them Hylomecon vernale, Aconitum coreanum, A. pseudoproliferum, Adonis amurensis, Anemone raddeana is important plant in this area and they are becoming sparse than past. In the life form spectrum hemiryptophytes is 40.6%.
The Early Vegetational Succession of he Burned Area in Dangji-Dong
Kim, Woen ; Jeong Ho Suh ; Chong Un Ri ;
The Korean Journal of Ecology, volume 6, issue 4, 1983, Pages 237~242
This is an investigation on the secondary vegetation and succession in the mixed forests destroyed by the severe crown fires on April 8, 1982. The results are summarized as follows: The floristic compositions in the investigated area are composed of 63 kinds of kinds of vascular plants. The biological type shows
, which is supposed to make a progress to the
type. Dominant species are Spodiopogon sibiricus (100.00)-Carex humilis var. nana (70.52)-Miscanthus sinensis var. purpurascens (61, 06)-Lespedeza maximowiczii (57.53). Lespedexa maximowiczii is prevailing as the dominant species in this area. The species diversity(H) and eveness index(e) show 3.00 and 0.74 respectively, so that the species are various and shows uniform distribution comparatively in these communities. Degree of succession(DS) is 479 in the investigated area, the value of which is comparatively higher than that of Chungcheongbuk-do area at the second year afer fires. After the crown and trunk of trees were scorched by the crown fires, the pine tree (Pinus densiflora) died and the other species could be survivd after sometimes. It some that Quercus serrata. Q. dentata, Maackia amurensis, Lespedez cyrtobotrya, Platycarya strobilacea and Lindera glauca are the fire-resistant plants.
The Effect of pH on the Mineral Nutrient Uptake in the Rice Seedlings
Chang, Nam-Kee ; Bok-Seon Lee ;
The Korean Journal of Ecology, volume 6, issue 4, 1983, Pages 243~249
Absorption pattern of potassium, calcium, phosphate and nitrate ions, and the pH change during ion-absorption at pH 3.0-11.0 by Oryza sativa L. were studied to investigate indirectly the evidence of H^+-efflux by ATPase. The rice seedlings which were grown either in
, were used both in each ion-absorption to compare with one another. The uptake rate of these ions appeared to favor more in
, over all range in pH, nearly with the same pattern. The absorption of potassium resulted in bell shape and that of calcium increased linearly to the alkali range. The shape of phosphate-absorption showed nearly the t-distribution curve with high value in acid range and the uptake of nitrate resulted in the dual peaks, but higher in acid range. The pH of the external solution changed from the range of 3.5-11.0 to 3.5-7.0 after lhr-absorptioin, and further acidified after 3hr-absorption. It is suggested that the pH change of the external solution be affected by
which may be caused by the ATP-hydrolysis.
Study on the Allelopathy of the Korean Ginseng
Lee, Seong Ho ; Jai Seup Ro ; Kyung Soon Lee ;
The Korean Journal of Ecology, volume 6, issue 4, 1983, Pages 250~256
Dehiscence of ginseng seeds under the various conditions, growing experiment in the different soil conditions, and growing experiment with extracts obtained by water passed the pot of 4 year ginseng plants were performed. The results obtained are as follows: The survival rate of ginseng plants in the soil of ginseng field sterilized by MIYAZAWA's method was higher than that of the non-sterilized, but lower than that of the control. The survival rate of ginseng plants on the sterilized soil of ginseng field was lower than that on the surrounding soil. The growth of ginseng plants cultivated with the water passed through the pot-planted 4-year-old ginseng plants was strongly inhibited in comparison with the control. Besides biological cause, chemical products excreted from the root of ginseng plants might be the important factors of soil sickness in the successive cultivation of the same plants.
The Study on the Heavy Metals Concentration in the Egg of Intermediate Egret, Egretta intermedia intermedia from Ogjong-myeon, Hadong-gun, in Summer
Hahm, Kyu-Hwang ; Ho-Won Lee ;
The Korean Journal of Ecology, volume 6, issue 4, 1983, Pages 257~260
The concentration of heavy metals in 12 eggs collected from 6 nests of Intermediate Egret, Egretta intermedia intermedia from Ogjong-myun, Hadong-gun, Kyungnam, was examined by atomic absorption spectrophoto-meter method in 1983. It was found that heavy metals are contained in their eggs with highest concentration Cd and Cu in the eggshell and Cr, Zn, Pb and Mn in the yolk, respectively. The thin-shelled group, by their eggshell thickness grouping, contained heavy metal in higher amount than that of thick eggshelled group. And the thin group showed small values in weight of individual egg, its yolk and albumen.