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        • KCI등재

          다양한 수위 조건에서 식물 생활형이 식물 정착에 미치는 영향

          남종민,조현승,김재근 한국습지학회 2015 한국습지학회지 Vol.17 No.1

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          본 연구에서는 정수 환경에 정착한 3생활형 9분류군의 식물을 대상으로 1년동안 정기적으로 모니터링을 실시하였으며, 이를 통해 식물 생활형이 수위 조건에 따라 식물 정착에 어떠한 영향을 미치는지 밝히고자 하였다. 18개의 실험구를 셋으로 나누어 16주 범람 기간 동안 0, 20, 60cm로 수위를 각각 유지하였으며, 범람 기간을 제외한 기간은 0cm로수위를 모두 동일하게 유지하였다. 1차년에 식재한 다년생 식물인 큰고랭이(Scirpus tabernaemontani), 줄(Zizaniacaduciflora), 부들속 2종(Typha angustifolia, T. orientalis)은 종자에 의한 추가적인 정착은 없었으며, 수문 조건이 밀도 및 초고 생장에 큰 영향을 미치지 않았다. 그러나 1년생 식물인 고마리(Persicaria thunbergii), 여뀌(Persicariahydropiper), 사마귀풀(Aneilema japonicum)과 2년생인 벼룩나물(Stellaria uliginosa), 뚝새풀(Alopecurus aequalis), 개피(Beckmannia syzigachne)는 상대적으로 수문 조건에 의한 영향을 크게 받았다. 정수 환경에서 침수 수위 및 침수 기간은 상대적으로 지하경을 형성하지 못하는 1, 2년생 식물 종들의 정착 및 생육에 큰 영향을 미치는 것으로 보인다. The purpose of this study is to reveal the effect of plant life cycle to plant settlement by 1 year monitoring. Thesubjects of monitoring are the plants (3 plant life cycle, 9 taxa) well established in the mesocosm. 18 mesocosms weredivided into 3 sets and water levels were maintained at 0, 20 and 60 cm during 16 weeks from mid-May, respectivelyand at 0 cm except these 16 weeks. Height and population size of transplanted perennial plants (Scirpus tabernaemontani,Zizania caduciflora, Typha (Typha angustifolia and Typha orientalis)) at 1st year were not affected bydiverse water level, though any more seedlings of these species were not settled at this condition. In contrast, waterlevel condition strong influenced annual and biennial plant, relatively. As a result, timing and duration of floodinghave great effect on successful settlement of annual and biennial plant without rhizome.

        • KCI등재

          Breeding Site Preferences and the Effects of Breeding Black-crowned Night Herons (Nycticorax nycticorax) on Soil Characteristics at Bamsum Island in Seoul

          남종민,Sungje Jeon,김재근 한국생태학회 2007 Journal of Ecology and Environment Vol.30 No.4

          Nest density was determined and tree and soil characteristics around Nycticorax nycticorax breeding sites and non-breeding sites on Bamsum Island in Seoul were analyzed from May 2005 to October 2006 to identify breeding site preferences of N. nycticorax and the effects of N. nycticorax nesting density on nesting tree structure and soil characteristics. N. nycticorax preferred trees of low height (3.5~6 m) and small diameter at breast height in high density Salix communities. Excrement of heron juveniles was dropped on the soil under the nests. The soil nutrient content under nests (P: 126.0 mg/kg, N: 202.8 mg/kg, EC: 549 μS/cm, pH 4.7) was much higher than that of control soils from Bamsum Island not enriched by heron excrement (P: 41.5 mg/kg, N: 42.0 mg/kg, EC: 342 μS/cm, pH 5.1). Formation of Salix communities on the shores of Bamsum Island is ongoing, and their structure has been directly influenced by annual flooding. After flooding, the nutrient content differences between heron-affected soils and control soils were not significant. This might be the reason that Salix communities on Bamsum were not affected by nesting herons as in other terrestrial communities where herons nest. This result indicates that flooding plays an important role in sustaining Salix communities on Bamsum Island where herons nest. The results of this study may increase understanding of N. nycticorax breeding behavior which may be useful for conservation planning.

        • KCI등재

          둔촌동 습지에서 미지형이 식물 군락 구성에 미치는 영향

          남종민,전승혜,최호,김재근 한국습지학회 2014 한국습지학회지 Vol.16 No.4

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          본 연구에서는 둔촌동 습지에서 미지형이 식물 군락 구성에 미치는 영향을 연구하기 위하여 2007~2008년에 걸쳐 지형에따른 수위 변화와 식물 군락의 변화를 조사하였다. 조사 지역을 지대가 낮은 지형부터 높은 지형까지 4개 구역으로구분하여 조사하였으며, 각각의 구역은 조사 지역 면적 대비 약 11%, 10%, 18%, 24%의 면적을 가지고 있었다. 조사 기간동안 수환경의 pH는 6.10(±0.13), 전기전도도는 51.5(±6.0)㎲/cm이었으며, PO4-P, NO3-N, NH4-N은 각각 0.04(±0.02)mg/L,0.14(±0.07)mg/L 그리고 0.01mg/L 이하로 유지되었다. 2008년 3~4월 누적 강수량이 2007년 대비 약 56%로 적었던 것이지대가 낮은 지형에서 수위 환경 차이를 유발하여 식물 군락 형성에 매우 큰 영향을 미쳤으며, 지형의 높이에 따라 해당구역을 우점하는 식물 길드가 다르게 나타났다. 이러한 결과는 종자로부터 생활사가 시작되는 1년생 식물 종들이 조사지역을 전체적으로 우점하였기 때문이며, 다양한 길드의 식물들이 혼재하기 위해서는 높이 구배가 있는 미지형이조성되어야 한다는 것을 의미한다. The purpose of this study is to investigate the effect of micro-topography to vegetation pattern in Dunchon-dong wetland. Tocharacterize the effect of micro-topography, changes in water level and vegetation pattern were monitored from 2007 to 2008. Depending on the relative elevation, the study site was divided into 4 sectors. The relative areas of sectors in ascending orderwere 11%, 10%, 18% and 24%, respectively. During investigation period, average water pH was 6.10 (±0.13), electronconductivity was 51.5 (±6.0)㎲/cm, PO4-P, NO3-N and NH4-N concentration were 0.04 (±0.02)mg/L, 0.14 (±0.07)mg/L, andlower than 0.01mg/L, respectively. Water level was very changeable in low-water season because the area of lowest sector wassmall. This characteristic increased the effect of difference of accumulated precipitation from March to April in 2007 and 2008to plant community composition in lower sectors. Different plant guilds dominated respective sectors and annual plants weremajor dominant species in the study site. This study suggested that the elevation gradients are necessary to create the habitatsfor various plant guilds in wetland.

        • KCI등재

          Establishment strategy of a rare wetland species Sparganium erectum in Korea

          김서현,남종민,김재근 한국생태학회 2017 Journal of Ecology and Environment Vol.41 No.8

          Background: To reveal establishment strategy of Sparganium erectum, we tried to find realized niche of adults through field survey and effects of water level on the establishment process through mesocosm experiments. Results: In the field survey, the height and coverage of community living in deeper water were greater than those of community living in shallow water. There was no statistically significant difference (p > 0.05) in the means of water and soil properties between the two communities. In mesocosm experiments, we found no correlation between water levels and germination rates, but S. erectum seedlings have characteristics of post germination seedling buoyancy when S. erectum seeds germinated in inundation conditions. Shoot height, total leaf length, and survival rates of sinking seedlings in shallow water levels at −5, 0, and 5 cm were higher than those in deeper water levels at 10 and 20 cm. Floating seedlings established in water levels of 3 and 6 cm only. The seedlings could live up to 6 weeks in floating state but died if they were unable to establish. Conclusions: The water level around adult S. erectum communities in the field were different from the water level at which S. erectum seedlings can survive in the mesocosm experiments. The findings provided not only understanding of S. erectum habitat characteristics but also evidence to connect historical links between the early seedlings stage and adult habitat conditions. We suggested the logical establishment strategy of S. erectum based on the data.

        • KCI등재

          Effects of habitat differences on the genetic diversity of Persicaria thunbergii

          남보은,남종민,김재근 한국생태학회 2016 Journal of Ecology and Environment Vol.40 No.2

          To understand the effects of habitat characteristics on the genetic diversity of Persicaria thunbergii, three sites of different environmental conditions in a water system were surveyed. Site A was the closest to the source of the water system, and there was a dam between sites A and B. Site C is located on the lowest downstream in the water system. Vegetation survey of four quadrats at each site was performed, and soil samples were collected for physicochemical analysis. Random amplification of polymorphic DNA (RAPD) analysis of ten P. thunbergii individuals at each site was conducted to calculate population genetic diversity and genetic distance among populations. Soil was sterile sand at site A, whereas loamy soil at sites B and C. A pure stand of P. thunbergii appeared at site A, while other species occurred together (such as Humulus japonicus and Phragmites australis) at sites B (Shannon- Wiener index; HB = 0.309) and C (HC = 0.299). Similar to the species diversity, genetic diversity (Nei’s gene diversity; h) within population of site A (hA = 0.2381) was relatively lower than sites B (hB = 0.2761) and C (hC = 0.2618). However, site C was separated from sites A and B in genetic distance rather than the geographical distance (Nei’s genetic distance; A~B, 0.0338; B~C, 0.0685; A~C, 0.0833).

        • KCI등재

          Implication of Self-thinning in Salix Communities on Riverine Wetland Restoration

          김재근,남종민,한미혜 한국생태학회 2007 Journal of Ecology and Environment Vol.30 No.3

          Self-thining was measured in Salix comunities on Bam Island in Seoul at various age stages.D2H was used to estimate tre biomas, where D is tem diameter at breast height or 10 cm height for plantswith eight <1.5 m, and H is height. A log-log plot of density versusD2H and corelation analysis indicated asignificant relationship betwen density and biomas with equation 'log D2H = .1.27 log N + 7.06'. This indicatesthat self-thining afects biomas in the Salix comunity with .1.27 as the thining coeficient. If we asumea thining exponent .3/2, then the alometric oeficient of the quation, log w = a log D2H + b, is 1.18. Thisis much igher than that for any other species tudied in Kore a. There were statisticaly significant relationshipsbetwen age and ensity and betwen age and basal area nd the se relationships ugest guidelines fortransplantation of wilows and for the asesment of Salix comunity restoration projects in riverine wetlandsbased on standard ensity, basal area, and age. The results o f this tudy may also increase understanding ofsucesion proceses in Salix comunity restoration in riverine wetlands.

        • KCI등재

          Comparison of environmental characteristics at Cicuta virosa habitats, an endangered species in South Korea

          김재근,신차정,남종민 한국생태학회 2013 Journal of Ecology and Environment Vol.36 No.1

          Cicuta virosa is an endangered species in Korea, which is a southern marginal area. To conserve and restore habitats of this plant, we investigated water and soil environmental characteristics and vegetation at four habitats during the growing season. The C. virosa habitats differed in community structure, water and substrate properties, and water regime. Although the total distribution ranges of the water and soil environments for C. virosa were wide and overlapped with the optimal environmental range of distribution of accompanying species, the optimal water level range for C. virosa was defined as 7 ± 3.5 cm. Water level was adjusted by substrate structure such as a mound of P. japonica and a floating mat comprised of accompanying species. A floating mat was an aid to maintain an optimal and stable water level in deep or fluctuating water and to prevent strong competition with prolific macrophytes. The GS sampling site, which had floating mats, could be a good model for C. virosa conservation in a warm temperate region, whereas the PC sampling sites, which experienced a water shortage in spring, provided a clue about the decline in C. virosa population size.

        • KCI등재

          국제개발협력 프로그램의 참여적 성과모형 구축연구: 유네스코 브릿지 프로그램의 변화이론 적용의 사례를 중심으로

          홍문숙,이태주,남종민,박준영,정다정 연세대학교(미래캠퍼스) 빈곤문제국제개발연구원 2019 地域發展硏究 Vol.28 No.1

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          The increase in connectivity on global, national and local arenas provides renewed opportunities and challenges for various community development and educational development initiatives around the world. The Bridge Africa Program of Korea National Commission for UNESCO(KNCU) is one of the more notable examples of Korea’s transnational, translocal, interdisciplinary program. In this research, the Program’s Framework was developed by utilizing the Theory of Change(ToC) as a strategic planning and evaluation method. The results of the research highlight critical lessons for ‘dimensions’ of international educational development. The main findings are; first, by using this framework, the core areas of the education programs are more clearly re-categorized; second, the wide and ambitious scope of the program was re-organized; third, hosting a series of participatory Theory of Change Workshops provided opportunities for various stakeholder to learn new development methods and to gain a better understandings of vastly different perceptions on goals and outcomes. In this context, it is fair to say the application of ToC in the process of program strategy includes ‘reconcile dilemma between ’accountability’ and ‘learning’. The adaption of the ToC successfully served its role as an analysis tool to understand the motivations of the stakeholders on a more multi-layered, multi-disciplinary and cross-country knowledge on strategic community and education program’splanning, monitoring and evaluation processes were deepened. However, the strong result-oriented approaches, emphasized throughout the planning process may lead to a problematic ‘trade-off’ relations between accountability and learning in the actual field implementation in the future. 본 논문은 우리나라의 대표적인 다국가・다지역・다주제 개발협력프로그램인 유네스코 한국위원회 브릿지 아프리카 프로그램의 참여적 성과모형 구축사례를 중심으로 참여자 간의 학습의 과정을 담보할 수 있는 변화이론의 적용이 지역사회기반 국제교육프로그램의 기획 및 평가에 주는 함의를 모색하는 데 그 목적이 있다. 연구 결과, 책무성 측면(Accountability Dimension)과 학습의 측면(Learning Dimension)에서 아래와 같은 결과가 도출되었다. 첫째, 초국가・국가・지역 차원의 성과 나레티브를 주제별, 활동 유형별, 프로그램 층위별, 프로그램・프로젝트의 대상별로 구조화하여 프로그램 다면적 성과가 체계화 및 가시화되었다. 둘째, 변화이론의 적용은 장기적 목표를 중심으로 다양한 사업 및 전달방법을 다층위적인 구조로 표현할 수 있게하고, 변화의 목표와 방향성을 열린 구조로 점검할 수 있게 하였다. 참여적으로 수립된 성과프레임워크는 향후 2030년까지 진행되어야 할 프로그램의 목표를 명확히 하고 프로그램 전략과 수행방식을 개선할 수 있는 기반을 제공하였다. 셋째, 이해관계자들 사업수행의 방법을 개선할 수 있는 방법을 구체화하였으며, 모니터링과 평가에 대한 지식을 축적할 수 있는 학습의 계기가 제공되었다. 결과적으로 본 사례연구는 성과와 목표를 강조하는 책무성과 과정을 강조하는 이해관계자들의 학습을 강조하는 입장 사이에 긴장이 존재함에도 불구하고, 사업 전략의 체계화 단계에서 책무성과 학습의 조화(reconcilable dilemma)를 이룰 수 있는 가능성이 존재함을 확인하였다. 그러나 본 성과모형이 지역사회 교육 현장에서 적용될 때, 프로젝트의 ‘성공’이 아닌 ‘성과’ 중심으로 이해되고, 성과 보고에 용이한 활동만 강조되는 방식으로 적용될 경우, 사업의 결과적인 측면에서 책무성과 학습의 가치교환(a trade-off) 관계의 딜레마가 존재할 것이라는 과제가 도출되었다.

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