• Korean Journal of Organic Agriculture
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• v.17 no.2
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• pp.193-209
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• 2009

Total collected benthic macro invertebrates in rice paddy fields were identified 3 phylum, 5 class, 13 order, 25 family, 32 genera and 36 species, those in organic rice field were 12 order, 22 family and 28 species, and in conventional rice field were 10 order, 19 family and 25 species. The almost collected species inhabit lentic zone but Semisulcospira libertina, Corbicula fluminea, and Tipula sp. were habitat on lotic zone. The number of benthic macro invertebrates species was higher in organic paddy field than in conventional field. Eleven species were collected only on organic but eight species only on conventional field. The number of individuals were 870 on organic rice field which higher 3.6-fold on conventional field. The diversity indices of organic rice field were 1.57-2.45 and 0.71-2.61 in the first and second survey, respectively. The higher diversity indices, the lower dominance indices.

• Korean Journal of Environment and Ecology
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• v.34 no.6
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• pp.530-542
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• 2020

This study surveyed the central mountain area of Demilitarized Zone (DMZ) from March to October 2018 to reveal the appearance patterns of freshwater fish. We collected 7,744 individuals of 43 species in 12 families with skimming nets and cast nets in 12 stations during the survey. The dominant species was Zacco koreanus (30.3%), and the subdominant species was Z. platypus (18.5%), followed by Rhynchocypris oxycephalus (10.0%), R. steindachneri (6.7%), Microphysogobio yaluensis (5.9%), Acheilognathus signifer (4.5%), Pungtungia herzi (4.2%), and Orthrias nudus (2.6%). Among the collected species, four were legally protected. They included Hemibarbus mylodon, which was a natural monument, and Lethenteron reissneri, A. signifer, and Pseudopungtungia tenuicorpa, which were class II endangered wildlife designated by the Ministry of Environment. Twenty Korean endemic species (46.5%) and one exotic species, Micropterus salmoides, were also collected. Additionally, three climate-change sensitive species, R. kumgangensis, Ladislavia taczanowskii, and Cottus koreanus, and three landlocked species, L. reissneri, C. koreanus, and Rhinogobius brunneus appeared. The dominant species in each station were Z. koreanus (15 stations), Z. platypus (four stations), R. oxycephalus (four stations), and C. koreanus (one station). The species dominance index decreased from upstream to downstream (mainstream of Gimhwanamdae Stream), while the species diversity index and the species richness index increased. The community structure of the rivers was divided into the uppermost stream, upper stream, Han River, and Imjin River. Compared to antecedent surveys, this study collected the highest number of species. Two new species (Sarcocheilichthys variegatus wakiyae and Micropterus salmoides) were caught, while six species (Siniperca scherzeri, Leiocassis ussuriensis, Brachymystax lenok tsinlingensis, Rhodeus ocellatus, Abbottina springeri, Aphyocypris chinensis) did not appear. Gimhwanamdaecheon Stream has high biological value with the inhabitation of many species, including species under legal protection and high diversity and richness index scores. This paper also discussed a protection plan for this area.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.49-49
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• 2022

경기도 화성시 일대에서 미기록 침입외래식물인 서양전동싸리(Melilotus dentatus)를 발견하여 보고하고자 한다. 본 종은 아시아, 유럽 원산이며, 주로 경작지와 공원, 정원 등의 인공적인 환경에서 발견된다. 국내에서 발견된 서양전동싸리는 경작지 내 작물의 종자와 함께 국내로 유입된 것으로 추정되며, 농수로를 따라 인근 주변에서 약 15개체의 생육이 확인되었다. 국내 전동싸리속은 모두 외래식물로 현재 4종(M. suaveolens, M. albus, M. indicus, M. officianalis)이 보고되었으며 탁엽 기부가 엽병에 합착되고, 3출 우상복엽이며, 긴 총상화서, 난형 또는 난상타원형 열매를 가지는 공통된 형태적 특징으로 서양전동싸리와 혼동되기 쉽다. 그러나 본 종은 탁엽이 피침형이고, 소엽이 장타원형이며, 거치가 뚜렷하고, 배주가 2개이며, 종자의 색이 녹갈색인 특징으로 국내 근연 종들과 구분된다. 본 연구에서는 서양전동싸리의 실체와 생육환경을 확인하고, 그 결과를 바탕으로 형태학적 기재 및 화상자료를 비롯하여 주변식생 목록과종 식별을 위한 검색표를 제시하고자 한다.

• Korean journal of applied entomology
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• v.62 no.4
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• pp.325-331
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• 2023

Desmometopa Loew, 1866 is newly recognized in the Korean Peninsula, based on Desmometopa microps Lamb, 1914 that is new to Korean insect fauna. The species is known to have commensalistic habits with predacious insects and spiders. Diagnosis, description, images and DNA barcode sequences are provided, based on the obtained adult specimens.

• Journal of Life Science
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• v.25 no.5
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• pp.533-538
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• 2015

Four sites and one site were used to analyze fish diversity at the water systems of the Sineun reservoir and the Jeonchon reservoir, respectively. The field experiments were conducted to test the density dependence that could lead to population regulation by artificial inferences and environmental changes. We examined the effects of environmental factors on fish densities using SMATR freeware. It was estimated to be reduced to the density effect at four sites in 2012. Shannon-Weaver indices of the diversity (H’) of the Sineun reservoir were similar to those of the Jeonchon reservoir. Species diversity was in a range of 0.645 to 2.105. The H’ value of the upper region was higher than those of middle and low regions were, and values of richness were lower in downstream than upstream. Using the maximum likelihood solution for the removal estimators of two low regions of the river stations, the estimated migration probabilities from the resident fish to the migrated fish for five species (Cyprinus cuvieri, Carassius auratus, Pseudorasbora parva, Misgurnus mizolepis, and Oryzias latipes) had a mean of 0.623. Especially, migration probabilities from the Jeonchon reservoir to the Sineun reservoir for five species were high (a mean of 0.681). The period of migration was suggested to be about one month because of short geographical distances (50 m). We found no significant difference between the three categories in the distribution of the other four species, indicating the species probability was similar among stations.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.565-567
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• 2004

최근 컴퓨터 환경은 매우 빠르게 발전하고 있지만, 사람들은 여전히 종이로 된 문서를 사용한다. 본 논문은 프로젝션 화면 내에서 종이 문서의 기능을 향상시킨 Advanced Paper Document (APD)를 제안한다. APD는 종이 문서와 디지털 문서를 결합시키기 위해서 부가적인 장치 없이, 사용자의 손을 이용한 문서의 선택과 조작 등의 다양한 명령을 수행한다. APD는 종이 문서와 디지털 문서의 장점을 모두 가지고 있으며, 사용자에게 자연스럽고 직관적인 환경을 제공한다. 실험 결과를 통해서, APD가 종이 문서와 디지털 문서의 기능을 결합하는 데에 적합하며, 손의 추출 및 인식과 문서의 검색에서 만족스러운 성능을 보여줌을 확인하였다.

• Proceedings of the Korea Contents Association Conference
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• 2016.05a
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• pp.193-194
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• 2016

세포사멸(apoptosis)이란 유전자에 의해 제어되는 세포의 능동적인 죽음을 의미하며 진핵세포만이 가지는 기작으로 세포자살을 일컫는 말이다. 단백질 정보 DB인 UNIPROT으로부터 진핵 생물 종의 세포사멸 단백질(apoptotic protein)을 수집하여 아미노산 서열에 대한 서열비교분석(alignment)을 진행하였다. 그 결과에 따라 다양한 종에 걸쳐 그 서열이 유사하게 유지되는 세포사멸 단백질을 중심단백질로 선정하였다. 비교단백체 분석을 통해서 생물 계통도에서 보여지는 생명종과 이들 단백질과의 연계성을 비교 분석함으로써 단순한 진핵세포에서 점진적으로 확대되는 종까지의 세포사멸 과정을 추론하였다.

• Korean Journal of Environment and Ecology
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• v.28 no.3
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• pp.293-301
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• 2014

15 artificial ponds in Seoul have been examined to find out the characteristics of Odonata community according to age and size of pond. We found 6 Families 36 Species of Odonata community, and Libellulidae was the most frequent and 19 Species were observed among Libellulidae. Considering relative importance with frequency of appearance and density, Ischnura asiatica and Orthetrum albistylum was the most frequent. Also, 16 Species including Lestes temporaris, Sympetrum parvulum, and Anax nigrofasciatus were relatively rare. The result of dominant species tells that Ischnura asiatica in 1 ~ 3 year old ponds, Pantala flavescens-Orthetrum albistylum-Crocothemis servilia mariannae in order of mention in 4 ~ 6 year old ponds, Platycnemis phyllopoda-Ischnura asiatica in order of mention in 10 or more year old ponds are the dominant species. Species diversity index regarding age of pond has been researched, and species diversity index in 10 year old pond was higher than that of in 1 ~ 3 year old pond. Having done the analysis of variance for types of spawn, there are many species Endophytic egg-layers and pasting in mud or sand in 10 year old artificial ponds. The wider ponds get, the higher species diversity index gets. And, we suggest that desirable size for making artificial ponds to increase the species diversity index of Odonata is $100{\sim}300m^2$.

• Korean Journal of Ichthyology
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• v.19 no.4
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• pp.332-342
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• 2007

Species composition and quantitative and body length composition of the ichthyoplankton were investigated by samples collected from the coastal waters of uljin in January, April, July and October, 2002. During the study, the collected fish eggs were identified as belonging to 7 taxa. The most of dominant species Engraulis japonicus, were accounted for 38.34% of the total fish eggs, followed by Sillago sihama (25.84%). The collected larvae and juveniles were identified into 25 taxa, 18 families, 7 orders. The domninant species Engraulis japonicus accounted for 90.46% of the total larvae and juveniles, followed by Sebastes schlegeli 2.04%. These 2 taxa constituted 92.50% of the total collected larvae and juveniles. The diversity index of species per months of the collected juveniles the coastal water of Uljin, 2002 was 0.0878~2.3855 and the evenness index was 0.0451~0.9300. in case of dominance index was 0.3000~0.9914 against the evenness index. The analyzed species diversity index by the each stations was 0.3035~0.7440 and the dominance index was 0.8919~0.9669 against the species diversity index. The similarity of community structure per season was very high because of the relative difference (0.010), which was the least in Summer and Fall. In addition, the community structure was very similar in state 1 and state 4 out of each stations because the relative difference was the least, 0.139.

• Korean Journal of Ecology and Environment
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• v.46 no.3
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• pp.367-379
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• 2013

The distribution of Coreoperca kawamebari was known to be restricted to the Tamjin River and several small streams flowing into the southern part of the West Sea, while C. herzi was widely distributed throughout South Korea except the areas inhabited by C. kawamebari: the two species were known to be allopatric. However, we found that both species were sympatric in the Boseong River, a tributary of the Seomjin River, and the Jiseok Stream, a tributary of the Yeongsan River. Local-scale distribution of the two Coreoperca species, fish assemblages, and environmental variables were surveyed to investigate effects of environmental factors on fish community structures in the Boseong River. Rank abundance distribution of fish community at the study sites indicated that fish species diversity and distribution pattern of the two Coreoperca species were closely related to habitat diversity. The result of canonical correspondence analysis showed that C. kawamebari was distributed in pool areas while C. herzi was found in the areas with higher water velocity and boulder substrate. These results suggested that species diversity of fish community decreased and only one of the two Coreoperca species inhabited at the sites with less diverse habitat, but on the other hand, high habitat diversity increased species diversity and allowed the two species to coexist.