• Journal of Ecology and Environment
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• 제34권2호
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• pp.167-174
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• 2011

Black-billed magpies (Pica pica) are a highly sedentary species due to their short and round wings, which are not adequate for long distance flights. We investigated geographic variation in the vocal signals of magpies residing in South Korea and Japan (subspecies sericea). Based on the magpie's limited dispersal ability, we predicted that the variation in vocal signals of black-billed magpies could be explained by geographic barriers such as mountain ranges and straits. We analyzed four-syllable chatter calls of magpies from five localities in South Korea, which are separated by mountain ranges (Seoul, Daejeon, Daegu, Gwangju, and Busan), and two island localities separated from the mainland by straits (Jeju in Korea and Saga in Japan). We found significant differences in the characteristics of magpie chatter calls recorded in the seven localities, and the variation pattern was independent among the variables. Mainland-island differentiation and north-south differentiation were observed. In general, magpies on Saga were the most distinctive. North-south differentiation was observed among the Korean mainland localities. However, the pattern was not related to the presence of putative geographic barriers. We hypothesize that the patterns of geographic variation in the structure of magpie chatter calls residing in South Korea might have been shaped by a sudden expansion of magpies followed by low level of local isolation, which may have led to vocal differentiation. Along with elucidating the vocal environment of Korean magpie populations, more extensive sampling is needed to clarify the functional aspects of geographic variation in the vocal signals of Korean magpies.

• Journal of Ginseng Research
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• 제37권4호
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• pp.491-495
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• 2013

Wood-cultivated ginseng, including roots in its dried form, is produced in forest land without using artificial facilities such as light barriers. To identify suitable sites for the propagation of wood-cultivated ginseng, factor combination technique (FCT) and linear combination technique (LCT) were used with geographic information system and the results were superimposed onto an actual wood-cultivated ginseng plantation. The LCT more extensively searched for suitable sites of cultivation than that by the FCT; further, the LCT probed wide areas considering the predominance of precipitous mountains in Korea. In addition, the LCT showed the much higher degree of overlap with the actual cultivation sites; therefore, the LCT more comprehensively reflects the cultivator's intention for site selection. On the other hand, the inclusion of additional factors for the selection of suitable cultivation sites and experts' opinions may enhance the effectiveness and accuracy of the LCT for site application.

• Asian Pacific Journal of Cancer Prevention
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• 제16권2호
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• pp.667-674
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• 2015

Background: Colorectal cancer (CRC) is the third most common malignancy in Malaysia, where data are limited regarding knowledge and barriers in regard to CRC and screening tests. The aim of the study was to assess these parameters among Malaysians. Materials and Methods: The questionnaires were distributed in the Umra Private Hospital in Selangor. The questionnaire had four parts and covered social-demographic questions, respondent knowledge about CRC and colorectal tests, attitude towards CRC and respondentaction regarding CRC. More than half of Malay participants (total n=187) were female (57.2%) and 36.9% of them were working as professionals. Results: The majority of the participants (93.6%) never had a CRC screening test. The study found that only 10.2% of the study participants did not consider that their chances of getting CRC were high. A high percentage of the participants (43.3%) believed that they would have good chance of survival if the cancer would be found early. About one third of the respondents did not want to do screening because of fear of cancer, and concerns of embarrassment during the procedure adversely affected attitude to CRC screening as well. Age, gender, income, family history of CRC, vegetable intake and physical activity were found to be significant determinants of knowledge on CRC. Conclusions: The major barriers identified towards CRC screening identified in our study were fear of pain and embarrassment. The findings have implications for understanding of similarities and differences in attitude to CRC amongst elderly patients in other cultural/geographic regions.

• International Journal of Industrial Entomology and Biomaterials
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• 제16권2호
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• pp.75-86
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• 2008

In order to understand geographic genetic variation and relationship among populations of the mason bee (Osmia cornifrons Radoszkowsky), which is used as pollinator for apple tree, we sequenced a portion of mitochondrial (mt) COI gene, which corresponds to "DNA Barcode" region (658 bp) from 81 O. cornifrons individuals collected over eight localities in Korea. The sequence data revealed overall moderate to low genetic diversity within species, with a maximum sequence divergence of 0.76%. Geographically, two haplotypes (BAROC01 and BAROC02) were widespread with a frequency of 82.7%, whereas several haplotypes were found in a locality as a single individual, suggesting that haplotype distribution can be summarized as coexistence of a few widespread haplotypes and several regionally restricted haplotypes. Overall, high rate of per generation female migration (Nm=$1.1{\sim}$infinite) and low level of geographic subdivision ($F_{ST}=0{\sim}0.315$) among localities were characteristic. Although two populations (p < 0.026) were genetically subdivided from the remaining localities, no clear polarity was observed. Taken together, the nature of genetic divergence of the mason bee populations is characterized as one that possessing moderate to low genetic diversity, high gene flow, and wide spread haplotypes with ahigh frequency, concordant with the capability of dispersal in connection with the lack of historical biogeographic barriers.

• International Journal of Industrial Entomology and Biomaterials
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• 제23권1호
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• pp.155-166
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• 2011

The leaf beetle, $Chrysolina$ $aurichalcea$ (Coleoptera: Chysomelidae), is a pest damaging plants of Compositae. In order to understand the genetic diversity and geographic variation we sequenced a portion of mitochondrial COI gene (658 bp) and complete nuclear internal transcribed spacer 2 (ITS2) of the species collected from seven Korean localities. A total of 17 haplotypes (CACOI01~CACOI17), with the maximum sequence divergence of 3.04% (20 bp) were obtained from COI gene sequence, whereas 16 sequence types (ITS2CA01~ITS2CA16), with the maximum sequence divergence of 2.013% (9 bp) were obtained from ITS2, indicating substantially larger sequence divergence in COI gene sequence. Phylogenetically, the COI gene provided two haplotype groups with a high nodal support (${\geq}87%$), whereas ITS2 provided only one sequence type group with a high nodal support (${\geq}92%$). The result of COI gene sequence may suggest the presence of historical biogeographic barriers that bolstered genetic subdivision in the species. Different grouping pattern between COI gene and ITS2 sequences were interpreted in terms of recent dispersal, reflected in the ITS2 sequence. Finding of unique haplotypes and sequence types only from Beakryeng-Islet population was interpreted as an intact remnant of ancient polymorphism. As more samples are analyzed using further hyper-variable marker, further fruitful inference on the geographic contour of the species might be available.

• 한국지리정보학회지
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• 제19권3호
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• pp.89-101
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• 2016

본 연구에서는 로드킬 GIS 데이터와 네이버 거리뷰를 이용하여 토지피복과 도로침입 방어막이 포유류 로드킬에 주는 영향을 분석하고 야생동물의 도로 횡단을 가능하게 하는 이웃 경관과 도로 변수 간의 상호작용을 검증하였다. 야행성이며 다중 서식지를 이용하는 일반종인 고라니, 너구리, 멧토끼의 로드킬은 섭식, 번식을 위해 선호하는 서식지를 중심으로 영동과 중부 고속도로 인근 나지, 초지, 습지에서 다발하는 것으로 나타났다. 개통된 지 오래된 노선인 영동에서는 종 간 토지피복의 차이가 없던 것(p=0.165)으로, 신규 개통 후 지속적인 연장공사가 이루어졌던 중부는 차이가 유의했던 것(p=0.001)으로 나타났는데, 이는 산악지대인 영동선과 도심화 지대인 중부선 간 경관유형의 차이 혹은 개통일과 야생동물의 주변 서식지 적응도 및 연장공사 빈도수의 차이에서 비롯된 결과로 추정된다. 야생동물 도로 횡단 방지 효과가 미미하거나 없는 것으로 나타난 펜스 및 가드레일과 달리, 절 성토면의 방지 효과는 유의한 것으로 나타났으나, 도움닫기를 위한 경사면으로 연출될 경우 병치된 펜스효과를 상쇄시키는 것으로 나타났다. 또한 교차로 인근에서 고속도로와 병치되는 국도 혹은 지방도의 경우 펜스 및 성토면이 부재한 사례가 많아 로드킬 발생의 취약 지점으로 나타나며, 특히 교차로의 초지 패치는 고속도로 양 옆 경관 패치와 이어지는 시각적 징검다리 역할을 함으로써 도로를 건너려는 동물들에게 시각적 은폐기능을 제공하고, 이는 교차로 인근에서의 높은 로드킬 발생율로 설명되어진다.

• 보건교육건강증진학회지
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• 제20권3호
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• pp.77-90
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• 2003

The purpose of this study was to identify the influencing factors on the compliance of breast self-examination (BSE) among 205 Christian women living in Pusan and U1san areas. Structured self-administered questionnaires were used. Knowledge levels were measured by the instrument developed by Choi(l996). Self- efficacy and health belief were measured by the instruments developed by Champion (1993) and modified by Choi(1996). Women who did BSE more than once within 6 months were categorised as compliant. Data was analyzed by descriptive statistics, t- test, χ² test and logistic regression analysis using SPSS WIN program. The results of this study were summarized as follows； 1. 15.1％ of women performed the BSE at least once during the last 6 months. 2. Non-complier and compliant women showed statistically significant differences in the level of self efficacy and barriers. 3. Predictors of BSE compliance were ‘history of having breast disease’, ‘experience of receiving recommendation for BSE’, ‘barriers’, and ‘experience of meeting with breast cancer patients’ and explained 14.8％ of variance in compliance of BSE. For future clinical practice, health professionals, including nurses, need to actively suggest to women the importance of BSE, and to distribute the information through posters and pamphlets at clinics and public health centers. Including the opportunity to meet patients in health education centers can be another strategy to increase women's motivation for BSE. For future research, it is necessary to recruit women from broader geographic areas utilizing various sources such as community centers to increase generalizability of the findings.

• The Plant Pathology Journal
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• 제35권2호
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• pp.125-136
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• 2019

Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity.

• 지질공학
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• 제23권1호
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• pp.57-65
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• 2013

본 연구에서는 자연사면에서 토석류 산사태 대응공법의 설계 프로그램(CDFlow ver 1.0)을 개발하였다. 이 프로그램은 자연사면에서 발생되는 산사태의 발생 가능성을 평가할 수 있으며, 토석류 산사태로 인하여 발생되는 피해범위를 산정할 수 있다. 또한 이 프로그램은 토석류 산사태의 대응공법 위치와 규모를 설계할 수 있다. 이 프로그램은 가장 잘 알려진 지리정보시스템(GIS) 개발도구중의 하나인 ArcGIS 엔진에서 구동되도록 개발되었다. 그리고 유사동역학적인 습윤지수와 무한사면의 안정해석기법을 적용하여 산사태 발생가능성을 예측하였다. 계산된 사면안전율은 기준안전율과 비교하여 산사태 잠재발생 구간을 선정하고 이를 도면상에 표시하였다. 토석류량은 산사태 잠재발생 구간과 토층심도에 의해 산정된다. 그리고 누적 토석류량은 이동경로를 따라서 계산할 수 있다. 개발된 프로그램의 적용성을 평가하기 위하여 실제 산사태 발생현장을 대상으로 적용하였다. 산사태 발생현장은 강원도 인제군 덕산리에 위치하고 있으며, 대상수계에 4개의 사방댐이 설치되어 있다. 토질실험 및 현장조사결과를 토대로 산사태 발생가능성이 높은 구간과 토석류의 이동경로를 산정하였다. 해석결과 기존에 설치된 사방댐의 규모는 계산된 토석류량을 저장하기에 부족한 것으로 나타났다. 따라서 본 프로그램을 이용하여 토석류 산사태 대응공법의 설치위치와 규모를 합리적으로 산정할 수 있을 것이다.

• Molecules and Cells
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• 제20권1호
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• pp.151-156
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• 2005

The phylogeny and geography of the medaka (Oryzias latipes) populations of Korea were investigated by analyzing sequence data for the mitochondrial control region. From the 41 haplotypes including 25 Korean haplotypes detected in 64 Korean specimens and data for the Japanese and Chinese populations, phylogenetic and nested clade analyses were executed to examine the phylogeny of haplogroups and the relation of the genetic architecture of the haplotypes to the historical geography of the Korean medaka fish. The analyses suggest that there are two very distinct lineages of Korean medaka, and that these result from reproductive isolation mechanisms due to geographic barriers. The southeastern lineage has experienced recent range expansion to the western region. The northwestern lineage, sister to Chinese populations, showed evidence of internal range expansion with shared haplotypes.