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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Korean Journal of Ecology
Journal Basic Information
Journal DOI :
The Ecological Society of Korea
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Volume & Issues
Volume 28, Issue 6 - Dec 2005
Volume 28, Issue 5 - Oct 2005
Volume 28, Issue 4 - Aug 2005
Volume 28, Issue 3 - Jun 2005
Volume 28, Issue 2 - Apr 2005
Volume 28, Issue 1 - Feb 2005
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Dynamics of Carbon Sequestered in Concentric Layers of Soil Macroaggregates
Park, Eun-Jin ; Smucker, Alvin J.M. ;
The Korean Journal of Ecology, volume 28, issue 4, 2005, Pages 181~188
DOI : 10.5141/JEFB.2005.28.4.181
Methods used to study carbon sequestration by soil aggregates have often excluded the concentric spatial variability and other dynamic processes that contribute to resource accessibility and solute transport within aggregates. We investigated the spatial gradients of carbon (C) and nitrogen (N) from the exterior to interior layers within macroaggregates,
mm, sampled from conventional tillage (CT) and no tillage (NT) sites of a Hoytville silt clay loam. Spatial gradients in C accumulation within macroaggregates were related to the differences in C dynamics by determining the sizes and the turnover rates of fast C and slow C pools in the concentric layers of aggregates. Aggregate exteriors contained more labile C and were characterized by greater C mineralization rates than their interiors in both management systems. In contrast, C in the interior layers of aggregates was more resistant in both systems. These results indicated the spatial differentiation of C dynamics within macroaggregates, i.e., exterior layers as a reactive site and interior layers as a protective site. Greater total C distribution in the exterior layers of NT aggregates indicated more influx of C from the macropores in interaggregate space than C. mineralization (net gain of C), whereas lower C distribution within the exterior layers of CT aggregates indicated net loss of C by greater C mineralization than C influx. We found total C increased approximately 1.6-fold by the conversion of CT soils to NT management systems for a period of 36 years. Differences in total accumulation and the spatial distribution of C within aggregates affected by management were attributed to the differences in aggregate stability and pore networks controlling the spatial heterogeneities of resource availability and microbial activity within aggregates.
Adaptation of Betula schmidtii Seedling in Coal-mine Field with Different Sewage Sludge Treatment Methods
Han, Sim-Hee ; Lee, Jae-Cheon ; Oh, Chang-Young ; Kim, Pan-Gi ;
The Korean Journal of Ecology, volume 28, issue 4, 2005, Pages 189~192
DOI : 10.5141/JEFB.2005.28.4.189
We tested the field adaptation of Betula schmidtii on the abandoned coal-mine soil with sludge amendment methods for promoting physiological activity of B. schmidtii seedlings under several environmental stress. Sewage sludges were amended to coal-mine soil with B. schmidtii seedlings which grown in the mixture of artificial soil and composted sludge soil before transplanting (before-fertilized treatment, BF) and fertilized with composted sludge after transplanting (after-fertilized treatment, AF). The percent of establishment of seedlings for AF (80.7%) was lower than that for BF (92.7%). Nitrate reductase activity and photosynthetic pigment content were higher in AF than in BF, but malondialdehyde (MDA) content and superoxide dismutase (SOD) activity were lower in AF than in BF These results represent that after-fertilized seedlings increase resistance against physiological stress at field condition using nitrogen source of composted sludge. On the contrary, before-fertilized seedlings were susceptible to environmental stress on abandoned coal-mine soil by exhausting of nitrogen source from composted sludge.
Developmental Characteristics of Eggs and Yolk Sac Larvae of Korean Striped Bitterling, Acheilognathus yamatsutae (Cyprinidae), Spawning in Mussels
Song, Ho-Bok ; Son, Yeong-Mok ;
The Korean Journal of Ecology, volume 28, issue 4, 2005, Pages 193~198
DOI : 10.5141/JEFB.2005.28.4.193
This study investigated the characteristics of the eggs and yolk sac larvae of Korean striped bitterling, Acheilognathus yamatsutae, spawned and grown In mussels. The number of eggs in the ovary was small (
SD). The eggs were oval and large, and the formation of the perivitelline space was narrow. The eggs were hatched at only 41 hours after fertilization but the hatched larvae were underdeveloped. The development of yolk projection and minute tubercles on the skin surface was notable, along with the vividly moving tail in the hatched larvae. The yolk projection and minute tubercles were disappeared upon enhancement of the motor ability of the larvae was enhanced. The formation of eyes and body pigments of the larvae was relatively delayed in comparison with that of other cyprinid larvae. After completely consuming the yolks the larvae escaped from the mussel for free swimming and exogenous feeding.
A Research for Shorebirds on the Southernmost of Nakdong Estuary
Hong, Soon-Bok ;
The Korean Journal of Ecology, volume 28, issue 4, 2005, Pages 199~206
DOI : 10.5141/JEFB.2005.28.4.199
Estuary islets should be managed systematically because they are important places for birds to rest and breed. This paper investigates the environmental properties of islets where the sand banks are located from east to west on the southernmost of Nakdong estuary during a year (September 2003
August 2004). The research showed that 59 species and 19,148 individuals were found in the area A (Jangja Shinja-Do) and 61 species and 28,394 individuals in the area B (Saja-Do; Beakhapdeung Doyodeung). Totally, 74 species and 47,539 individuals were observed in both of this estuary. Shorebirds are the most observed species in both areas. In area, most of individuals were especially observed in the spring when Shorebirds migrate northward for breeding. In B area, various species were also observed in the fall when they migrate southward for wintering. Therefore, many groups of birds are observed around Shinja-Do in the spring. They passed the winter in Doyodueng, associated with feeding in the main stream of Nakdong river mainly. Although the southernmost sand bar is the breeding place to access to outside without interception, invasion by human beings and predators (mice, weasels and etc.) gives a fatal blow for birds to breed or rest. The reed which is a tall herbaceous plant is flourished according to the process of ecological succession. Therefore, the sand bar becomes a land. It results in reduction of habitats and breeding grounds for birds. In conclusion, these areas where birds can use the islets as habits and breeding places must be preserved by restraining luxuriance of reeds and systematic management of human beings and predators is necessary.
A Phytosociological Study of the Quercus spp. Forests in the Lower Montane Zone of Middle and Northern Parts, Chungbuk Province, Korea
Lee, Jang-Soon ; Kim, Heon-Kyu ; Song, Jong-Suk ;
The Korean Journal of Ecology, volume 28, issue 4, 2005, Pages 207~214
DOI : 10.5141/JEFB.2005.28.4.207
The present study was undertaken to classify and describe the Quercus spp. forests in the lower montane zone of Mts. Bakdal, Gyemyeong, Boryeon, Worak, Cheondeung, Joryeong, Gungmang, Buyong and Sirubong in Chungbuk Province, Korea using the methodology of the Z.-M. school's phytosociology. The Ouercus spp. forests were classified into three communities and two groups; A. Quercus variabilis community A-1. Quercus serrata-Quercus acutissima group, A-2. Quercus mongolica group; B. Quercus mongolica-Rhododendron schlippenbachii community; C. Quercus dentate-Chloranthus japonicus community. These vegetation units were arranged by human interference and a gradient of environmental complex such as altitudes, and also were corresponded relatively well with a result of cluster analysis (UPGMA) based on the dominance of component species.
Analysis on Cloud-Originated Errors of MODIS Leaf Area Index and Primary Production Images: Effect of Monsoon Climate in Korea
Kang, Sin-Kyu ;
The Korean Journal of Ecology, volume 28, issue 4, 2005, Pages 215~222
DOI : 10.5141/JEFB.2005.28.4.215
MODIS (Moderate Resolution Image Spectrometer) is a core satellite sensor boarded on Terra and Aqua satellite of NASA Earth Observing System since 1999 and 2001, respectively. MODIS LAI, FPAR, and GPP provide useful means to monitor plant phonology and material cycles in terrestrial ecosystems. In this study, LAI, FPAR, and GPP in Korea were evaluated and errors associated with cloud contamination on MODIS pixels were eliminated for years
. Three-year means of cloud-corrected annual GPP were 1836, 1369, and 1460g C
for evergreen needleleaf forest, deciduous broadleaf forest, and mixed forest, respectively. The cloud-originated errors were 8.5%, 13.1%, and 8.4% for FPAR, LAI, and GPP, respectively. Summertime errors from June to September explained by 78% of the annual accumulative errors in GPP. This study indicates that cloud-originated errors should be mitigated for practical use of MODIS vegetation products to monitor seasonal and annual changes in plant phonology and vegetation production in Korea.
An Ecological Study on the Vegetation of Bijin and Yongcho Islets
Kim, In-Taek ; Park, Tae-Ho ; Choi, Jae-Eun ;
The Korean Journal of Ecology, volume 28, issue 4, 2005, Pages 223~230
DOI : 10.5141/JEFB.2005.28.4.223
The vegetation of Bijin and Yongcho Islets was investigated from February 1, 2000 to March 30, 2002, and forest structure was constructed. Vascular plants of this area consisted of 12 forms, 59 varieties, 476 species, 352 genera, 112 families and 37 orders. Among them, 37 species (6.8% out of the total 547 taxa) of evergreen broad leaved trees, 36 species (6.6% out of the total 547 taxa and 19.7% out of the total naturalized plants in Korea) of naturalized plants, 6 species of endemic plants and 41 species of cultivated plants were observed. Rare and endangered plants include 1 taxa: Crypsinus hastatus ('98-4). The vegetation in this study area was classified into 9 communities (Pinus thunbergii, Castanopsis cuspidata var thunbergii Camellia japonica, Neolitsea sericea, Machilus thunbergii, Quercus variabilis, Carpinus coreana, Platycarya strobilacea, Miscanthus sinensis var. purpurascens) and 1 afforestation (Alnus firma).
Comparative Water Relations of Quercus acuta and Castanopsis cuspidata var sieboldii in Early Winter
Park, Bum-Jin ; Park, Yong-Sam ; Park, Yong-Mok ;
The Korean Journal of Ecology, volume 28, issue 4, 2005, Pages 231~235
DOI : 10.5141/JEFB.2005.28.4.231
Comparative water relations of Quercus acuta and Castanopsis cuspidata var, sieboldii were analyzed to assess their resistance to drought and low temperature stresses from early November to early December, As air temperature decreased both species showed an increased content of osmotically active solute concentration per unit of dry weight (NS/DW), leading to lower osmotic potential of both species at both full turgid state
and turgor loss point
in December than November. No major difference in the ability to adjust osmotically was noticed between the two. This finding suggests that both species must respond adaptively under water and low temperature stresses to maintain turgor pressure in winter season. In addition to osmotic adjustment, a low bulk modulus of elasticity
shown in Castanopsis cuspidata var. sieboldii must also play an important role in turgor maintenance during winter season being apt to happen water and low temperature stresses in plants.