• Journal of the Korean Society of Environmental Restoration Technology
• /
• v.10 no.3
• /
• pp.8-13
• /
• 2007

This study was surveyed to know changing flora between pre and post of restoration in cheonggyechon. As results, it was surveyed families 33, species 94 in 2003 and families 39, species 156 in 2005. In 2006, it was surveyed families 38, species 171. This result shows that cheonggyechon is unstable initial condition in restored stream ecosystem. Also, Naturalized species was 19 species in 2003 and it was respectively 44, 46 species in 2005, 2006. Hazard species of ecosystem was in common 3 species in three surveys. Recently, as time goes by, introduced species are increasing. And succession has mainly been progressed by one year or binary herbs. To administer restored stream ecosystem, monitoring is essential. Therefore, continuous monitoring about Naturalized species and Hazard species of ecosystem is also very important. Further, Because change of vegetation on pre and post of Restoration in Cheonggyechon Stream is very important, Monitoring will have been surveyed continuously.

• Journal of Korean Society on Water Environment
• /
• v.28 no.1
• /
• pp.26-37
• /
• 2012

Multi-dimensional hydrodynamic and water quality models are widely used to simulate the physical and biogeochemical processes in the surface water systems such as reservoirs and estuaries. Most of the models have adopted the Eulerian grid modeling framework, mainly because it can reasonably simulate physical dynamics and chemical species concentrations throughout the entire model domain. Determining the optimum grid cell size is important when using the Eulerian grid-based three-dimensional water quality models because the characteristics of species are assumed uniform in each of the grid cells and chemical species are represented by concentration (mass per volume). The objective of this study was to examine the effect of grid-size of a three dimensional hydrodynamic and water quality model (EFDC) on hydrodynamics and mass transport in the Saemangeum Reservoir. Three grid resolutions, respectively representing coarse (CG), medium (MG), and fine (FG) grid cell sizes, were used for a sensitivity analysis. The simulation results of numerical tracer showed that the grid resolution affects on the flow path, mass transport, and mixing zone of upstream inflow, and results in a bias of temporal and spatial distribution of the tracer. With the CG, in particular, the model overestimates diffusion in the mixing zone, and fails to identify the gradient of concentrations between the inflow and the ambient water.

• Journal of Species Research
• /
• v.8 no.3
• /
• pp.268-282
• /
• 2019

Recent integrative taxonomic research demonstrated a high endemism of Korean copepods, with closest relatives usually in neighboring countries. Although Korean fauna could be considered well-studied, some marginal habitats still provide unexpected discoveries of copepods described from distant parts of the world. Here I report three such examples. Two belong to the family Tetragonicipitidae: Phyllopodopsyllus thiebaudi santacruzensis Mielke, 1989 and Laophontella horrida dentata Mielke, 1992; one to the family Ancorabolidae: Laophontodes norvegicus George, 2018. Scanning electron microscope photographs are provided for the first time for all three species, revealing unknown details of complex three-dimensional structures and ornamentation of somites. Phyllopodopsyllus thiebaudi santacruzensis was described from the Galapagos Islands, while Laophontella horrida dentata was described from the Pacific Coast of Costa Rica; for both this is the second record, which extends their range into the Western Pacific. Laophontodes norvegicus was described from Norway; this Korean record is its first in the Pacific. The first species is represented in my samples by numerous males, females, and juveniles. However, the second one is represented by one adult male and one juvenile female, while the third is represented by a single adult male, which might suggest that the marine interstitial is not their preferred habitat in Korea.

• The Korean Journal of Mycology
• /
• v.47 no.2
• /
• pp.113-120
• /
• 2019

We isolated endophytic fungal strains from the roots of three medicinal crops, Ligusticum chuanxiong, Angelica gigas, and Cnidium officinale, cultivated at Yeongju, Korea. The fungal strains were identified based on their morphological characteristics and molecular analyses of their internal transcribed spacer, large subunit rDNA, and beta-tubulin regions. Thereby, we identified three previously unrecorded endophytic fungal species, Dactylonectria pauciseptata, Rhizopycnis vagum, and Sistotrema sernanderi, in Korea. In this report, we describe the morphological characteristics and phylogenetic analyses of these three fungal species.

• Journal of Veterinary Science
• /
• v.23 no.6
• /
• pp.91.1-91.9
• /
• 2022

Three parameters, body weight gain (BWG), intestinal lesion score (LS) and fecal oocyst shedding, were compared in broilers infected with major parasitic species; Eimeria acervulina, E. maxima, and E. tenella. First, two- and three-week-old chickens with Eimeria infection showed LS of approximately 3, but two-week-old chickens were more correlated with BWG. Second, significant differences in BWG were observed between male and female broilers challenged with Eimeria. Finally, E. maxima-infected broilers among three Eimeria species showed a higher relationship between BWG and LS, suggesting three considerations such as genders, age and Eimeria species for Eimeria experiments.

• Korean Journal of Plant Taxonomy
• /
• v.53 no.1
• /
• pp.38-46
• /
• 2023

Chloroplast genomes of two morphologically similar species, Viola selkirkii and V. ulleungdoensis, were compared. For this comparison, three individuals of V. selkirkii from Ulleung-do Island (UE), Jeju-do Island (JJ), and Hwacheon-gun (HC) and one of V. ulleungdoensis from UE were collected. According to chloroplast genome sequencing of V. selkirkii and V. ulleungdoensis, their genomes were found to contain 156,774-157,454 and 157,575 bp, respectively, and a total of 111 genes. In the comparison of the three V. selkirkii individuals, V. selkirkii obtained in UE was distinguished from those of the other regions of HC and JJ, and in the comparison of the three V. selkirkii individuals and one V. ulleungdoensis individual, V. selkirkii obtained from UE and V. ulleungdoensis were distinguished from the species in the other regions. In addition, a phylogenetic analysis revealed that 32 taxa of Viola formed a monophyletic group (bootstrap support [BS] = 100). The four Viola individuals used in this study (three V. selkirkii and one V. ulleungdoensis) formed a monophyletic group (BS = 100), which was further divided into two subclades. One subclade comprised V. selkirkii found in UE and V. ulleungdoensis, whereas the other subclade comprised V. selkirkii found in HC and JJ. These results support the view of prior studies that V. selkirkii growing in UE and V. ulleungdoensis are the same species.

• Mycobiology
• /
• v.33 no.1
• /
• pp.61-64
• /
• 2005

Three species of the Laboubeniales from Korea are described. They are new to the mycological flora of Korea. Corethromyces purpurascens on several parts of Ochthephilum densipenne, Laboulbenia barbara on the metasternum of Philonthus longicornis and L. compressa on the elytra of Harpalus tinctulus were found.

• The Korean Journal of Ecology
• /
• v.16 no.1
• /
• pp.1-15
• /
• 1993

Ordination and classification techiques were used to analyze the forest communities and to examine the integration problem of community-to-ecological species group in mt. moak provincial park of korea. phytosociological classiication based on floristic composition produced seven commuities of zelkova serrata, carpinus densiflora. These seven communities were well discriminated in the two-dimensional analyses of soil moisture, soil organic matter content and temperature(elevation), eciprocally, and in three-dimensional space of the three environmental factors also. They corresponded to seven ecological groups derived from the distribution pattern analysis of species populations in this mountain.

• Korean Journal of Environmental Biology
• /
• v.22 no.2
• /
• pp.273-278
• /
• 2004

A taxonomic survey of the dinoflagellate family, Triadiniaceae Dodge was conducted on 17 locations off the coast of Korea. Three species of Goniodoma collected from the coast of Korea: Goniodoma orientale Lindemann, G. polyedricum (Pouchet) Jorgensen, and G. sphaericum Murray et Whiting.

• Animal Systematics, Evolution and Diversity
• /
• v.10 no.1
• /
• pp.39-46
• /
• 1994

Seven species of intersititial Collebola are identified from South Korean sand dunes. Three of them are new to science, Wilemia koreana, Onychiurus mariangeae and Protaphorura kwona. This is the first report of Collembola inhabiting coastal milieu from the Korean peninsula.