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        검색결과 1,587

        121.
        2022.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Benthic macroinvertebrates are important ecological and environmental indicators as primary or secondary consumers, and therefore are widely used in the evaluation of aquatic environments. However, there are no comprehensive river ecosystem monitoring surveys that link the major physicochemical water quality items with benthic macroinvertebrates in urban streams. Therefore, this study investigated the distribution characteristics of benthic macroinvertebrates and physicochemical water quality items (17 items) in Yangjaecheon and Yeouicheon from 2019 to 2020. At the same time, by applying Spearman’s rank correlation analysis and nonmetric multidimensional scaling (nMDS) analysis in the water quality data and biotic index, we tried to provide basic data for diagnosing the current status of river ecosystems in major urban rivers in Seoul. Based on the study results, a total of 39 species and 3,787 individuals were identified in Yangjaecheon, the water quality (based on BOD, TOC, and TP) of Yangjaecheon was higher than Grade Ib (good), and the BMI using benthic macroinvertebrates appeared as Grade C (normal) at all the sites. In Yeouicheon, a total of 51 species and 4,199 individuals were identified, the water quality (based on BOD, TOC, TP) was higher than Grade Ib (good) similar to Yangjaecheon, and the BMI of both Upstream and Saewon bridge was Grade B (good), while Yeoui bridge was Grade C (normal). Overall, analysis results for the distribution of benthic macroinvertebrates by a nonmetric multidimensional scaling method showed no significant difference between the two streams (p=0.1491). Also, significant environmental variables related to benthic macroinvertebrates distribution were determined as water temperature and DO. On the other hand, the results of the correlation analysis between biotic index and major water quality items confirmed that R1 and BMI could be used for on-site urban river water quality evaluation.
        4,800원
        122.
        2022.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Ecological occupation in irrigation ponds is a well-acknowledged fact that is essential for biodiversity conservation in agricultural ecosystems. However, there are few studies on the ecological functions and relationship between a paddy field and irrigation using macroinvertebrates in an environmentally friendly paddy field. The objective of this study is to identify the community and distribution characteristics of macroinvertebrates in an agricultural paddy field and irrigation pond ecosystems, and to provide basic data on the ecological function of an environmentally friendly paddy field. Macroinvertebrate sampling was conducted from May to September in an agricultural paddy field and irrigation pond in an environment-friendly paddy field in Boryeong city. We conducted a study to identify the distribution characteristics using macroinvertebrate species analysis, such as Functional Feeding Groups (FFGs), Habitat Oriented Groups (HOGs), rarefaction curve, and a two-way dendrogram. A total of 37 species of macroinvertebrates in 28 families, 13 orders were collected study during the period of the investigation. Dominant taxa of macroinvertebrates included Coleoptera, Hemiptera, and Odonata. In terms of FFGs, predators and gathering collectors accounted for approximately 70%, in relation to HOGs, and climbers and swimmers occupied more than 50% from both the paddy field and irrigation pond. With respect to the rarefaction curve, the irrigation pond (July) was high as E (S, 141)=18 species, while the paddy field (May) was comparatively low as E (S, 141)=9 species. In conclusion, our results revealed that macroinvertebrates, such as Notonecta triguttata, Peltodytes intermedius, Appasus major, Laccotrephes japonensis, Appasus japonicus, Sigara substriata, Enochrus simulans, and Sternolophus rufipes, were used as a habitat and spawning ground in both paddy field and irrigation pond. The irrigation pond appears to be a very important spawning ground for macroinvertebrates.
        4,000원
        126.
        2022.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        사람들의 인터넷 활동으로 많은 인터넷 용어를 탄생시켰다. 이 중 일부 용어는 널리 사용되어 유행하게 되었으며, 이는 그 당시의 사회 발전 상 태, 사람들의 이데올로기를 대표하는 용어로 선정되기도 하였다. 본 연구 는 중국 국가언어자원감시연구센터가 2021년 12월 6일 발표한 ‘2021년도 10대 인터넷 용어’를 바탕으로 생태언어학 관련 이론을 적용해 분석하고 연구한다. 그리고 이것을 통해 유익한 담화의 사용을 장려함으로써 파괴 적 담화의 발생을 줄이고, 사용을 자제하여 인류사회의 생태가 지속적으 로 건전하고 잘 발전하도록 유도한다. 생태언어학자 스티베는 ‘할라테이 모델’을 기반으로 비판적 생태 언어 학을 발전시켰다. 그는 전 세계인의 관점에서 7개 단어로 구성된 생태관 을 정리하고 그에 맞는 대화 분석 모델을 제시하였다. 본고에서는 이 생 태관과 대화 분석 모델을 바탕으로 조국사랑, 단결추구, 용감한 활동, 근 검절약 등과 같은 가치와 결합하여 생태관을 생성하고 10개의 인터넷 용 어에 대한 분석을 시행하였다. 10개의 인터넷 용어 중 먼저, ‘躺平’은 퇴폐적이고 부정적인 정서 때문 에 사람들이 쉽게 포기하고, 생태관이 맞지 않아 파괴적 담화로 분류된다. 다음으로, ‘YYDS’, ‘破防’, ‘元宇宙’, ‘绝绝子’, ‘伤害性不高, 侮辱性极强’, ‘我 看不懂, 但我大受震撼’ 6개의 단어는 생태환경에 도움이 되는 측면과 생 태환경을 해치는 측면이 있어 양면적 담화로 분류된다. 끝으로, ‘觉醒年 代’, ‘双减’, ‘强国有我’는 삶을 중시하고 현재와 미래를 주시하며, 자원의 공평한 분배에 유리하며 유익한 담화로 분류된다. 이런 분석을 통해 유익한 담화를 많이 쓰도록 권장하고 긍정적인 영향 을 미쳐, 파괴적인 담화의 사용을 자제하고 부정적인 영향을 줄임으로써 사회 생태계가 장기적으로 더욱 지속적이고 건강하게 발전할 수 있다.
        6,400원
        127.
        2022.05 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The purpose of this study is to provide information about annual variations in catch size and changes in reproductive biology in the common octopus, Octopus vulgaris, a commercially important species in Jeju Island. Samples were collected from coastal waters of Jeju Island, Korea by coastal trap fishery from January to November 2021. Octopus vulgaris have been decreasing in this region since 1984. The mantle length (ML) ranged from 4.5 to 17.8 cm and body weight (BW) ranged form 88.5 to 2,657.5 g. A χ 2 -test revealed that the number of males was significantly greater than females (χ 2 = 32.712, df = 10, P<0.05). Mature females were found from January to July and male occurred January to August. The gonadosomatic index value was higher from July to August than other months. The relationship between mantle length and body weight was BW = 2.4527ML 2.3139 (female) and BW = 2.6785ML 2.3159 (male). At 50% group maturity, female and male average weight was estimated to be 554.7 g and 330.6 g, respectively.
        4,000원
        129.
        2022.05 구독 인증기관 무료, 개인회원 유료
        4,000원
        133.
        2022.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This study aims to propose a conceptual design of information displays for supporting responsive actions under severe accidents in Nuclear Power Plants (NPPs). Severe accidents in NPPs can be defined as accident conditions that are more severe than a design basis accident and involving significant core degradation. Since the Fukushima accident in 2011, the management of severe accidents is increasing important in nuclear industry. Dealing with severe accidents involves several cognitively complex activities, such as situation assessment; accordingly, it is significant to provide human operators with appropriate knowledge support in their cognitive activities. Currently, severe accident management guidelines (SAMG) have been developed for this purpose. However, it is also inevitable to develop information displays for supporting the management of severe accidents, with which human operators can monitor, control, and diagnose the states of NPPs under severe accident situations. It has been reported that Ecological Interface Design (EID) framework can be a viable approach for developing information displays used in complex socio-technical systems such as NPPs. Considering the design principles underlying the EID, we can say that EID-based information displays can be useful for dealing with severe accidents effectively. This study developed a conceptual design of information displays to be used in severe accidents, following the stipulated design process and principles of the EID framework. We particularly attempted to develop a conceptual design to make visible the principle knowledge to be used for coping with dynamically changing situations of NPPs under severe accidents.
        4,300원
        134.
        2022.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The Bayesian algorithm model is a model algorithm that calculates probabilities based on input data and is mainly used for complex disasters, water quality management, the ecological structure between living things or living-non-living factors. In this study, we analyzed the main factors affected Korean Estuary Trophic Diatom Index (KETDI) change based on the Bayesian network analysis using the diatom community and physicochemical factors in the domestic estuarine aquatic ecosystem. For Bayesian analysis, estuarine diatom habitat data and estuarine aquatic diatom health (2008~2019) data were used. Data were classified into habitat, physical, chemical, and biological factors. Each data was input to the Bayesian network model (GeNIE model) and performed estuary aquatic network analysis along with the nationwide and each coast. From 2008 to 2019, a total of 625 taxa of diatoms were identified, consisting of 2 orders, 5 suborders, 18 families, 141 genera, 595 species, 29 varieties, and 1 species. Nitzschia inconspicua had the highest cumulative cell density, followed by Nitzschia palea, Pseudostaurosira elliptica and Achnanthidium minutissimum. As a result of analyzing the ecological network of diatom health assessment in the estuary ecosystem using the Bayesian network model, the biological factor was the most sensitive factor influencing the health assessment score was. In contrast, the habitat and physicochemical factors had relatively low sensitivity. The most sensitive taxa of diatoms to the assessment of estuarine aquatic health were Nitzschia inconspicua, N. fonticola, Achnanthes convergens, and Pseudostaurosira elliptica. In addition, the ratio of industrial area and cattle shed near the habitat was sensitively linked to the health assessment. The major taxa sensitive to diatom health evaluation differed according to coast. Bayesian network analysis was useful to identify major variables including diatom taxa affecting aquatic health even in complex ecological structures such as estuary ecosystems. In addition, it is possible to identify the restoration target accurately when restoring the consequently damaged estuary aquatic ecosystem.
        4,900원
        135.
        2022.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        An estuary is an area where a freshwater river or stream meets the ocean. Even before the importance of the value of estuaries was recognized, the estuary was lost because of large-scale conversion by draining, filling, damming, and dredging. In South Korea, 643 estuaries are located, and the total area is 3,248,300 ha, accounting for 32.5% of the total area of South Korea. Over 35% of Korean estuaries are closed estuaries which are only temporally connected with the sea, either permanently or periodically. Since 2008, in order to preserve the estuary ecosystem and solve major issues in the estuary by accumulating knowledge about the estuarine ecosystem, the Ministry of Environment of Republic of Korea has been conducting the “Estuarine Ecosystem Monitoring and Assessment Project”. At 668 sites of 325 estuaries, epilithic diatom, benthic macroinvertebrate, fish, and vegetation are investigated, and the habitat condition of each site is evaluated using the newly developed biotic index. More than 100 researchers annually record 2,097 species of estuaries according to the standardized survey guidelines over the past 14 years and provide strictly managed data necessary for establishing estuaries conservation policies. As a result of bibliometric analysis of 1,195 research articles related to the monitoring and assessment of the estuarine ecosystem, research on pollutants such as heavy metals and sediment control have recently been conducted. “Estuarine Ecosystem Monitoring and Assessment Project” is an ecological monitoring type of long-term mandated monitoring that is usually focused on identifying trends. Although it is difficult to identify the mechanism influencing a change in an ecosystem through long-term mandated monitoring, providing empirical data for supporting evidence-based policy, decision-making, and the management of ecosystems. In order to increase the efficiency of the project, research to investigate the relationship between sediments and pollutants and organisms can be conducted at specific estuaries or sites to compensate for the shortcomings of mandatory monitoring.
        4,000원
        136.
        2022.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 거제도 학동 일대에 분포하는 상록활엽수림의 식물군집구조 특성을 파악하기 위하여 진행하였다. 조사구 는 교목층, 아교목층, 관목층에 생달나무, 참식나무, 후박나무 등이 우점하거나 출현하는 식생군락 또는 입지환경의 변화가 있는 지역을 대상으로 52개의 방형구를 설정하였다. TWINSPAN에 의한 군락 분류 결과, 참식나무-생달나무군 락, 생달나무-동백나무군락, 동백나무군락, 굴참나무-동백나무군락, 동백나무-생달나무군락, 구실잣밤나무군락, 곰솔군 락, 굴피나무-예덕나무군락으로 구분되었다. 잠재자연식생을 반영한 난대림의 천이계열은 상록침엽수와 낙엽활엽수는 상록활엽수로 이행된다라는 연구 결과를 반영한다면, 곰솔, 굴피나무, 굴참나무 등이 우점하는 군락은 생달나무, 참식나 무 등의 상록활엽수림으로 진행될 것으로 추정되었다. 교목층과 아교목층에서 생달나무, 참식나무, 구실잣밤나무의 세력이 우세한 지역은 인위적인 교란이 없다면 현상태를 유지할 것이다. 환경요인과 식생분포간의 관계를 살펴보면, 토양의 물리적 특성 중 점토가 직간접적으로 영향을 미쳤는데 이는 급경사지에 입지하였기 때문인 것으로 판단되었다. 그 외에 토양산도(pH) 5~5.84, 전기전도도 0.047∼0.139dS/m, 유기물함량 3.32∼12.06%로 군락별 차이는 있었으나 전반적으로 낮았다.
        4,800원
        137.
        2022.01 구독 인증기관 무료, 개인회원 유료
        3,000원
        138.
        2021.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 고등학생의 건강증진행위를 설명하기 위한 가설적 모형을 구축하고 검증하기 위해 시도되었다. 연구대상자는 경기도 소재의 고등학교에 재학중인 1∼3학년 학생 395명을 대상으로 구조화된 설문지를 이용하여 2017년 12월01일부터 12월22일까지 자료를 수집하였다. 본 연구의 외생변수는 가족기 능, 친구지지, 학교생활환경, 지역사회 사회자본이고 내생변수는 자기효능감, 자기조절능력과 건강증진행위 이다. 수집된 자료는 SPSS 21.0과 AMOS 22.0 프로그램을 이용하여 분석하였다. 연구결과, 최종 수정모형 은 권장수준을 만족하여 가설적 모형에 비해 적합도와 간명도가 향상된 것으로 나타났다: χ2/df=1.96, GFI=.90, AGFI=.88, CFI=.94, TLI=.93, RMSEA=.05, SRMR=.06. 가설적 모형에서 설정한 13개의 경로 중 4개는 기각되었고 9개의 경로는 통계적으로 유의하였다. 이들 경로에 포함된 변수는 가족기능(β=.57), 자기효능감(β=.29), 자기조절능력(β=.14), 지역사회 사회자본(β=.14), 친구지지(β=.13)로 설명력은 86%이었다. 따라서 역기능적 가정과 해당 가정의 청소년의 건강증진행위를 위한 사회적지지 체계를 구축 하고 학교를 포함한 지역사회 환경조성을 위한 프로그램 개발이 필요하다.
        5,200원
        139.
        2021.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        황해는 유엔해양법협약 제123조에서 다루는 반폐쇄해로 한국-중국-북한이 주요 연안국이다. 황해는 UN이 지정하는 66개의 광역해 양생태계 중 하나로 자원적 가치가 큰 해역이다. 동 협약 제194조에 따라 자원의 사용 및 수익에 관한 연안국의 권리행사는 국가들 간 직접적 또는 지역기구를 통한 간접적 형식의 협력을 통하여 해양환경보호 및 보전에 관한 권리의무를 이행하는 범위 내에서 이뤄져야 한다. 따라서 월경성 환경오염원의 방지대책에 대한 연안국 사이의 법적 공백은 시의성 있게 다뤄져야 할 사안이다. 이와 관련하여 황해광역해양생태계 (YSLME)는 유엔개발계획(UNDP)의 프로젝트로 2기 사업까지 진행되어왔다. 이 과정에서 황해연안생태계에 대한 한·중 공동과학조사를 통한 월경성진단분석(TDA) 그리고 TDA를 바탕으로 한 전략활동계획(SAP) 수립이라는 성과도 있었지만 북한의 참여가 보장되지 못하였고 SAP의 이행에 관한 실효성 있는 관리체제의 부재라는 한계가 있었다. 이에 본 논문에서는 제3기 YSLME 프로젝트가 나아가야 할 방향으로 연안국 간 구속력 있는 조약체결 방안에 관한 연구를 목적으로 한다. 본 연구는 기존 와덴해 삼국 지역협정 성공요소 분석을 통해 한·중·북 지역협력체의 설립과 운영에 관한 단계적 조약화 방안의 타당성을 검증하였다. 단계적 방안을 살펴보면 선행적으로 삼국 공동선언을 통한 ‘황해삼국협력 위 원회의 설립’, ‘황해삼국협력관리 협정(trilateral treaty) 체결’, 골격조약(umbrella convention)을 모(母)조약으로 하는 ‘이행협정(Implementing Arrangement) 체결’의 3단계로 구분하여 볼수 있다. 단계적 입법을 통해 민감한 정치적 변수가 발생하여도 북한의 안정적 참여 유도와 사회 전 계층의 자발적 참여를 통해 황해해양오염 방지 및 대응에 관한 조약의 지속성 및 일관성을 담보할 수 있을 것이라 기대된다.
        4,000원
        140.
        2021.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The time series data of rotifer community focusing on the species number and total density were collected from 29 reservoirs located at Jeonnam Province from 2008 to 2016 quarterly. The reservoirs had similar weather condition during the study period, but their sizes and water qualities were different. To analyze the temporal dynamics of rotifer community, the medians, ranges, outliers and coefficient of variation (CV) value of rotifer species number and abundance were compared. For the temporal trend analysis, time series of each reservoir data were compared and clustered using the dynamic time warping function of the R package “dtwclust”. Small-sized reservoirs showed higher variability in rotifer abundance with more frequent outliers than large-sized reservoirs. On the other hand, apparent pattern was not observed for the rotifer species number. For the temporal pattern of rotifer density, COD, phytoplankton abundance fluctuation, and cladoceran abundance fluctuation have been suggested as potential factor affecting the rotifer abundance dynamics.
        4,000원