이원철 교수

The identification and management of the residents' attitude and perceived tourism impacts in destination communities has received significant attention. Evaluating residents' attitudes towards tourism and involving them in as many aspects of tourism management is an important factor in creating sustainability. The purpose of this paper was to examine relationship between community attachment and attitudes of residents toward public show cave. Data were collected from Wooljn, Kyong-Buk surroundi

The community structure of meiofauna was surveyed from six stations in sand mining area near around Sungapdo, Taean five times from April-December, 2007. Ten meiofaunal taxa in total, comprising 5-9 taxa per station were recovered. Nematodes were dominant from four stations in April and from five stations in May. In June, copepods were dominant from all stations except station two, from which sarcomastigophorans were predominant. Copepods were also dominant from three stations in October and fou

The community structure of benthic meiofauna was investigated from seasonal surveys at seventeen stations off the Saemangeum area, in 2007. Ten meiofaunal taxa were identified. Nematodes were the dominant faunal group in all seasons and harpacticoids were dominant only at a few stations. The mean density of meiofauna was 383 indiv. 10 cm−2, highest in May and November (434 indiv. 10 cm−2), lowest in February (284 indiv. 10 cm−2). Meiofaunal mean biomass was 80.49 μgC•10 cm−2, highest in November

The rapid increase in carbon dioxide levels in seawater is causing ocean acidification and is expected to have significant effects on marine life. To explore the ability of the harpacticoid copepod Tigriopus japonicus to adapt to an increased concentration of dissolved carbon dioxide (CO2) in seawater, we compared the survival rates of adult and nauplius stages at 400, 1000, and 1550 ppm pCO2 over a 14-day period. The survival rate of T. japonicus dramatically decreased over time with increase i

The eco-toxicological effects of endocrine disrupter, 4-nonylphenol (4NP) were observed and detected on the harpacticoid copepod, Tigriopus japonicus s.l. obtained and cultur-ed from our coast. There were no significant differences survival rate, sex ratio, and fecundity on T. japonicus s.l. at as low as 30 μg L-1 of 4 NP exposure. Whereas, 4NP induced developmental delay, decreasing biomass and body size of nauplius and copepodite. Also, Differentially Expressed Gene (DEG) was conducted to dete

Heavy metal contaminants on the aquatic environment are of interest because they can have severe effects on economy and public health. Recently, the studies for monitoring of heavy metals try to do on aquatic system to assess safety and health of ecosystem by heavy metals. Thus, biological responses were investigated on Korean fairy shrimp Branchinella kugenumaensis exposed to cadmium (Cd) or copper (Cu) for long-periods (30 days). The survival rate decreased significantly (p⁄0.05) on B. kugenum

The patterning of surface structures is a critical step for interfacial engineering applications that are based on soft lithography, casting, or imprinting techniques in general. However, photolithography and mold/die fabrication processes are expensive and time-consuming. To solve this problem, we developed a novel laser-based process that exploits the high stretchability of a polymer. In this study, continuous-wave laser-induced pyrolysis was conducted on a pre-stretched Ecoflex polymer substr

The objective of the study was to analyze constantlyhighly expressed proteins as a function of elevated midultraviolet (UVB, 280-315 nm) radiation in Tigriopus japonicus sensu lato (T. japonicus s.l). We also analyzed associations between kinetics of radiation avoidance, measured as a covered distance per time unit, and highly expressed proteins. The obtained results indicate an increase in T. japonicus s.l. mobility between the control (no radiation) and mild UV radiation levels (15 kJ·m-2). Tw

Pholcus gosuensis sp. nov. is described from the entrance zone of Gosu cave,Chungchengbuk -do, Korea. The species is characterized by male palpal organs withthree expanded apophyses and developed callosity on procursus, two frontalapophyses of chelicerae and degrading appendix, and sclerotized arches on uterusexternus. The species is related to P. crassusPaik, 1978 and P. acutulus Paik,1978 in having identical uncus and embolus but differentiated from those species bythe combined characters of l

The aim of this research was to detect and observe delivering generation effects from F0 generation exposed to 4-nonylphenol 4NP) to F1 generation on Tigriopus japonicus. The nauplius survival rate of F1 from F0 exposed to low 4NP concentration was significantly lower than other concentrations. Among the developmental process, copepodite first emergence day (CE) and adult male first emergence day (ME) on F1 were accelerated relatively high concentration conditions. The sex ratio of F1 was differ

The ecotoxicological effects of 4-tert-octylphenol were observed on Harpacticoid copepoda Tigriopus japo-nicus s.l.gathered and cultured from tidal pool of Korean coast. There were no significant differences in survi-val rate(except 10g/L; 70.00%) and sex ratio (except 30g/L) on T. japonicus s.l.exposed to 4-tert-octylphe-nol. However, 4-tert-octylphenol induced developmental delay(copepodite emergence day and adult male mer-gence day) and retardation of first brooding day of adult female. Moreo

야외에서 채집한 C. plumosus를 대상으로 잠재적 내분비계 교란물질인 DEHP, BPA 및 Tebufenozide를 처리물질로 하여 형태적인 교란 효과를 살펴보았다. 약제에노출된 개체의 하순기절은 부드러워지거나(smooth) 손실(loss)이 가장 많았으며 엷은 갈색을 보였다. 처리 물질에따른 기형의 정도를 살펴보면, DEHP는 46.2~85.7%,BPA는 73.7~90.9% 그리고 tebufenozide는 57.6~78.9%가 기형을 입어 BPA¤tebufenozide¤DEHP 순으로 기형이 크게 나타났다. 처리 물질별 기형 부위를 살펴보면,MIX (32~46%)¤MLT (25~34%)¤LT (3~7%)로 두 부분이 함께 기형을 입는 형태가 가장 많았으며 LT 단독의 기형이 가장 적었다. MIX 형태로 기형이 가장 높은 물질은 BPA (46%)¤DEHP (33%)¤tebufenozide (32%)이고,MLT에 가장 높은 기형을 보인 것은 DEHP (34%)¤tebufenozi

포란한 성충 암컷 Tigriopus japonicus (요각류)를 내분 비계 교란물질로 잘 알려져 있는 4-nonylphenol에 노출하여 생존율과 포란율의 변화를 살펴보았다. 실험생물은 2004년 4월 제주도 구안연안에서 플랑크톤망으로 쓸어 잡기로 채집한 후 실내순응을 한 달 동안 시켰다. 치사 율은 노출농도의 높아지면 증가하였으나 그 경향이 뚜 렷하지 않았다. 반면, 노출 후 처음으로 치사한 개체가 발생하는 시기는 비처리군과 처리군에 따라 명백한 차 이를 보였다. 포란한 암컷을 실험조건에 이동시키면 생 리적인 변동으로 인해 알이 떨어졌다가 4~5일 후 비처 리군은 100% 포란을 회복하지만 처리 군에서는 89~ 95%가 회복되어 약제노출에 따른 영향을 보였다. 치사 가 발생하는 시기는 비처리 시에는 10일 후부터이지만 노출 시에는 4에서 6일 후부터 발생하였다.