• Ocean Science Journal
• /
• 제42권1호
• /
• pp.41-48
• /
• 2007

We investigated the temperature and salinity effects on the major fish species in the wintering grounds based on trawl surveys and oceanographic observations in the southwestern waters of Korea during March-early April in 2002-2003. The influence area of warm Kuroshio water was limited to the southwestern area of Korea in 2003 with a range of $7.7-16.3^{\circ}C$, 32.54-34.70 of salinity, wider than that of 2002. The number of fish species and density of major fish species in 2003 were higher than in 2002. Geographical estimation showed high proportions of species number and catches in the areas around Jeju Islands, southwestern waters and the southeastern coast of Korea. Five species; silver pomfret (Pam pus echinogaster), hairtail (Trichiurus lepturus), anchovy (Engraulis japonicus), Small yellow croaker (Larimichthys polyactis) and yellow goosefish (Lophius litulon) were most abundant, composing above 60% of the total catch in 2002 and 2003. More than 50% of catch in the major fish species were mostly distributed in the range of $9.5-11.0^{\circ}C$ of temperature and 33.1-33.9 of salinity. Non-parametric estimation for the major species showed the 1st mode around $10^{\circ}C$ and the 2nd mode at $8-9^{\circ}C$ in 2002 and $11-14^{\circ}C$ in 2003. Among major fish species, hairtail was principally composed of juveniles, and larger individuals were caught in southeastern waters. These results are considered to be helpful for the area-based fishery management strategy for the wintering grounds of the Yellow Sea and coastal waters of Korea.

• 한국환경과학회지
• /
• 제19권1호
• /
• pp.47-59
• /
• 2010

This study was to examine the characteristics of wirdbirds habitat for improvement plan in green corridor. The target site, Gangseo-gu artificial green corridor was set up with the structure in which small scale of core green space with Goongsan and Yeomchang neighborhood parks in urbanized city was connected with the artificial green space with Gongamnaru, Hwanggeumnae neighborhood parks with 28~42.5 m in width. Wild birds six~eleven species; Dendrocopos spp, Paradoxornis webbiana, Parus major, Phasianus colchicus, etc. were observed in core green, but wild birds of two~five species: Columba livuia, Passer montanus, Pica pica, Hypsipetes amaurotis, etc. were observed in artificial green space. Thus wild birds of artificial and generalist species only moved in artificial green space. The artificial green space where vegetation structure was consisted of single-layer with poorness chose target species laying stress on generalist species and edge species of Parus major, P. palustris, Paradoxornis webbiana etc. for short-term and interior species of Dendrocopos major, Picus canus, etc. for long-term. The result suggested enhancement methods for target species's habitat in green corridor: to secure at least a corridor 30 meters in artificial corridor, to secure ecological pond, to offer the various shelterer and environment of prey-resources through the multi-layer structure.

• 한국응용곤충학회지
• /
• 제41권3호
• /
• pp.171-175
• /
• 2002

이 논문은 날개응에의 소매응애과(Haplozetidae)에 속하는 신종 제주소매응애(신칭: Incabates barbatus sp.nov.)를 기재한 것이다. 이 신종은 일본에서 기록된 1. major와 매우 닳았으나, 1. major는 가슴등판센털(머리끝털; ro, 지게털, la)과 감각털의 머리가 매끈한 반면 신종은 머리끝털(ro)과 지게털(la)의 중간부분 바깥쪽에 거치들이 나 있고, 감각기 머리 표면에 작은 돌기가 나 있어 거칠다. Incabates속에는 현재까지 신종을 포함하여 모두 9종이 기록되었는데, 이들에 대한 검색표를 작성하였다.

• 한국대기환경학회지
• /
• 제34권1호
• /
• pp.56-75
• /
• 2018

Korean Photochemical Assessment Monitoring Stations (PAMS) have been established since the late 2001 to monitor ambient air concentrations of VOC species, which would enhance understanding photo-chemical formation of ozone and subsequently contribute to developing efficient ozone control strategies. The present study aims at identifying major VOC species and examining their trends by analyzing PAMS monitoring data collected from the year 2006 to 2016. All the 18 PAMS sites operated by the Ministry of Environment were included in the study. PAMS monitored the 56 target VOC species, which are classified into four groups, alkenes, lower alkanes ($C{\leq}3$), higher alkanes ($C{\geq}4$), aromatics. The higher alkanes and aromatics dominated over the lower alkanes and alkenes in the type 2 and 3 PAMS sites except Joongheung site. N-butane was a major alkane species, toluene was a major aromatic species and most of VOCs showed decreasing trends in these sites. On the other hand, only the alkenes showed decreasing trends at the Joongheung site in Yeosu. Major sources of abundant species such as ethane, propane, n-butane, toluene were estimated by analyzing seasonal variations, correlation with other VOC species, and emission profiles. A major source of n-butane was identified as LPG cars, while major sources of toluene varied considerably from one site to another. The lower alkanes were composed of ethane and propane, both of which showed a strong seasonal variation, low in the summer and high in the winter, indicating that a major source might be the heating by gaseous fuels. Ozone formation potentials of VOC species were evaluated by applying MIR and POCP to the measured VOC species concentrations. Toluene contributed the most to total ozone forming potentials followed by m,p-xylene for all the type 2 and 3 PAMS sites except for two sites in Yeosu-Gwangyang. Ethylene and propylene were the first and second contributors to total ozone forming potentials at Joongheung site in Yeosu.

• Journal of Forest and Environmental Science
• /
• 제21권1호
• /
• pp.34-58
• /
• 2005

본 연구에서는 강원도 원주시와 횡성군내에 식재 활용 되고 있는 조경 식물의 이용 상황을 조사 분석하여 현재 어떠한 식물이 어떻게 이용되고 있는가를 파악함으로서 그 이용방법에 대한 개선 방안을 모색하고 아울러 원주시와 횡성군의 아름다운 경관 형성을 위한 관리 방법 등을 제시하였다.

• 한국어류학회지
• /
• 제10권2호
• /
• pp.241-249
• /
• 1998

1986년 6월에서 1987년 3월 사이 영광 연안에서 소형 otter trawl를 이용하여 계절별로 저어류를 채집하여 종조성 변화를 분석하였다. 총 33종의 어류가 채집되었으며, 그 가운데 민태(Johnius grypotus), 쉬쉬망둑(Chaeturichthys stigmatias), 보구치(Argyrosomus argentatus)와 참서대(Cynoglossus joyneri)가 우점하여, 이 4종이 총 채집개체수의 81.9%, 총생체량의 71.4%를 차지하였다. 출현종수와 채집량은 온수기에 높았고, 이 시기에는 주거종인 참서대와 회유중인 보구치와 민태가 우점하였다. 냉수기에는 출현종수도 적었고, 쉬쉬망둑과 등가시치(Zoarces gillii)가 우점하였다. 본 연구 주요 우점종의 상대빈도는 1995년의 자료와 유사한 계절변동을 보였다. 한반도 서남 연안 천해역의 저어류 자료와 비교한 결과, 민태와 쉬쉬망둑의 상대빈도는 조류가 빨라짐에 따라 감소하였으나, 참서대는 증가하였다. 이러한 중감 경향은 참서대의 체형이 민태나 쉬쉬망둑에 비하여 바닥에 접촉할 수 있는 면이 넓어 조류가 강한 연안역에서 우점할 수 있는 것으로 추정된다.

• 건축역사연구
• /
• 제16권1호
• /
• pp.9-28
• /
• 2007

We investigated the changes in the species of the woods used for Korean ancient and historic architectures, which include prehistoric excavated relics and existing wooden buildings in South Korea. The species data were collected from various sources such as excavation and repair reports, journal papers, and a few unpublished documents. We divided the building Periods as Paleolithic, Neolitic, Bronze Ages, Iron Age/Three Kingdoms, Koryo, Joseon (early, middle, late) and modem periods. In prehistoric periods, hardwoods were major species. Oak (Quercus spp.) woods dominated (94 percent in average); the others (5%) were Juglans mandshurica, Platycarya strobilacea, Castanea crenata, and few softwoods(1%). During Iron Age and Three Kingdom periods, oaks remained as a major species (57%) and others Platycarya strobilacea(21%), Castanea crenata(13%), and Pinus spp. (6%). The oak woods decreased in Koryo period and they occupied only 1.1%. Instead of oaks, pine (Pinus spp., 71%) and Zelkova serrata (22%) dominated in Koryo. In early and middle Joseon periods, pine woods (73%) remain as a major species and the others were oaks (14%) and Zelkova serrata (9%). As late Joseon came, the pine woods occupied more than 88%. In the late 19th and early 20th centuries, a few boreal species such as larch (Larix spp.) and spruce (Picea spp.), which grow in cold area, were found. We believe they were transported from northern Korea. The existing buildings in Korea are mainly from Joseon period and a few from late Koryo periods. During these periods, pine woods were used for most buildings. For such reason, pine woods were known as 'representative materials for historic buildings'. but earlier times, broad-leaved trees, i.e., oak and Zelkova woods were major materials. The changes in building materials resulted from both climate and human impacts. The dry climate and disturbed forests induce more pines in the mountains. We also compared the wood qualities of the species and found that Zelkova woods were superior ones and deserved more planting for future demands in the repair for historic buildings.

• Journal of Species Research
• /
• 제5권3호
• /
• pp.584-589
• /
• 2016

Four new species of the genus Longileptoneta from Korea, L. gachangensis, L. gayaensis, L. jangseongensis, and L. weolakensis, are described and illustrated.

• Journal of Species Research
• /
• 제5권3호
• /
• pp.590-595
• /
• 2016

Four new species of the genus Falcileptoneta from Korea, F. geumdaensis, F. geumsanensis, F. maewhaensis, and F. sunchangensis, are described and illustrated.

• 한국물환경학회지
• /
• 제29권5호
• /
• pp.598-609
• /
• 2013

Spatial and temporal distribution of environmental factors and epilithic diatom communities in major rivers (30 rivers and 58 sampling points) of the Korean peninsula were surveyed each one time before (May) and after the monsoon (October) 2012. The stream of the east harbor (EAST), the south harbor (SOUTH), and the west harbor (WEST) was sampled in order. Over the survey, a total of 284 taxa were classified, and the number of diatom species in each harbor did not show significant changes after the monsoon, but a biomass significantly decreased. Results also showed that EAST deterioration of water quality and chlorophyll-a after the monsoon, was opposite to SOUTH. Five major dominant species including Nitzschia inconspicua, which contained higher biomass over the survey, were common species which widely distributed in brackish water. Indicator Species Analysis showed that a large number of clean water species in EAST and polluted water species in SOUTH and WEST were emerged respectively. In sum, the Asian monsoon significantly decreased a biomass of epilithic diatoms and water qualities over the harbors (lower stream) in the Korean peninsula, but did not change the major species indicating water quality.