• Korean Journal of Ecology and Environment
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• v.41 no.3
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• pp.301-310
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• 2008

This study was to analyze characteristics of fish compositions and longitudinal distribution, based on trophic and tolerance guild at 22 sampling sites of Yeongsan River watershed during 2003$\sim$2006, and also to compare before and after the estuary dam construction. The collected fishes, based on catch per unit effort (CPUE), were 44 species in the watershed and dominant fishes were Zacco platypus, Acheilognathus macropeterus, Zacco temminckii and Carassius auratus. According to comparative analysis of fish in the non polluted sites (NPS) vs. polluted sites (PS), the number of species and individuals was lower by 70% in the PS than the NPS, indicating ecological degradations by chemical pollutions or/and habitat modifications. The relative abundance of sensitive and insectivore species decreased as the stream order increases, while tolerant and omnivore species increased with the stream order. In this survey, largemouth bass (Micropterus salmoides), which is a top-carnivore and exotic species, may influence trophic guild system throughout active predations on endemic species, resulting in modifications of ecological functions. The construction of estuary dam on Yeongsan River in 1981 resulted in wider lacustrine zone and desalinated through limitation of seawater input. These physical changes have caused increases of lentic dwelling species and limited fish migrations (i.e., eel). Overall, fish fauna and composition analyses showed that the number of species and individuals in this water body may be reduced due to inputs of pollutants from the watershed, habitat modifications, and increases of exotic species (largemouth bass). For these reasons, effective lake management strategies are required for the ecosystem conservation.

• Proceedings of the Korea Water Resources Association Conference
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• 2004.05b
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• pp.399-403
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• 2004

생태 수리학적 측면에서 수질 개선에 기여하는 깔따구들이 흐름 구조에 따라서 어떻게 분포하는지를 파악하기 위해 수리 실험을 수행하였다. ADV로 유속을 측정하였으며, 자기 다른 유속 조건하에서 유기물질과 깔따구들을 투입하였다. 취득한 유속자료를 이용하여 흐름구조를 파악하였으며, 난류특성인 난류 전단응력을 분석하였다. 유기물질과 깔따구들은 상대적으로 유속이 느리고 전단응력이 작게 나타나는 지점에 분포하였다. 깔다구들이 굴을 파고 서식을 하였더라도 흐름에 의해 서식처가 옮겨짐을 확인 하였으며, 서식처 역할을 할 수 있는 반구 구조물 주위에 서식하였다. 유기물질의 퇴적 및 깔따구들의 서식은 주로 흐름 방향 유속 분포에 영향을 받으며, 이차류도 이것들의 분포에 중요한 역할을 하고 있다.

• Journal of the Korean Institute of Landscape Architecture
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• v.39 no.2
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• pp.10-17
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• 2011

The paradigm of the use and management of natural resources is changing. Wise use of natural resources can be achieved by enhancing their conservation value and, at the same time, taking them as an opportunity for regional development. It leads to an idea of pursuing regional development by making good use of natural resources. In this paper, natural resources were classified as living species resources, ecosystem and landscape resources, and non-living resources. The resources were divided into 27 detailed analysis indices. The administrative boundaries of 165 municipalities in Korea were defined as spatial analysis units. Finally, a spatial database of natural resources was built. To classify the regional types, we conducted factor analyses with a detailed index of natural resources and a cluster analysis with the factor value. As the result of the factor analysis, six factors have been deduced as follows: forest resources, landscape resources, coastal ecology resources, inland water resources, landform resources, and ecology visit resources. In addition, the cluster analyses were conducted for the points of the factors drawn. The final classification consists of nine groups, and appropriate methods for each regional development have been suggested. Results of this study will contribute to providing fundamental materials for site selection and objective-setting for regional development policies and planning in consideration of natural resources.

• Journal of Environmental Impact Assessment
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• v.29 no.1
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• pp.26-36
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• 2020

This study aimed at investigating present research and knowledge-base on climate change adaptation in ecosystem sector and analyzed the current status of basic information on ecosystem that functions as evidence-base of climate change adaptation to deduce the suggestions for the future development for knowledge and information in biodiversity. In this perspective, a questionary survey titled as "the ecological knowledge-base and information needs for climate change adaptation" with the researchers who were engaged with adaptation studies for biodiversity in the ecosystem related-research institutes including national and 17 regional local governments-affiliated agencies in Korea. The results are as follows; current status of utilizing ecological information which supports climate change adaptation strategy, future needs for adaptation knowledge and ecological information, and activation of utilizing ecological information. The majority of respondents (90.7%) replied that the ecological information has high relevance when conducting research on climate change adaptation. However, only half of all respondents (53.2%) agreed with the real viability of current information to the adaptation research. Particularly, urgent priority for researchers was deduced as intensifying knowledge-base and constructing related information on 'ecosystem change from climate change (productivity, community structure, food chain, phenology, range distribution, and number of individuals) with the overall improvement of information contents and its quality. The respondents emphasized with the necessity of conducting field surveys of local ecosystem and constructing ecosystem inventories, advancing monitoring designs for climate change in ecosystem, and case studies for regional ecosystem changes with the guidance or guidelines for monitoring ecosystem change to enhance the quality of adaptation research and produce related information. In terms of activation for ecological information usage, national and local adaptation network should be working based on the integrated ecological platform necessary to support exchanges of knowledge and information and to expand ecosystem types in time and spatial dimension.

• Journal of the Korean association of regional geographers
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• v.10 no.4
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• pp.727-743
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• 2004

This paper aims to explore the geographic characteristics of ecotour resources in Gumho-river basin and to study the educational application of ecotour resources. To grasp the characteristics of ecotour resources in Gurnho-basin, this research carried out a literature review about Gumho-river basin and arranged ecotour resources by different types. Ecotour resources are divided into geomorphic and geologic resources, plant communities, wildlife habitats, cultural and historical resources, regional events with eco-resources. The case studies of New Zealand present good examples of how to successfully use the ecotour goals as a educational applications to Korea. The ecotourism in Korea has not still achieved the real benefits which meet environmental conservation, regional economic advantages and educational effects. Thus, the ecotour programmes should be include entrance limitations, strict opening time schedules, natural trails, museums for study, boards for study, well trained information officers and guides organized by residents. In addition, the local residents prepare of winter programmes for sustainable economic advantages.

• Korean Journal of Environmental Biology
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• v.39 no.2
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• pp.207-217
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• 2021

Using the data from the national survey of fish, we determined the population size and the distribution of Micropterus salmoides, which is a translocated species into the aquatic ecosystem of Korea. . The spatial concentration of this species was determined by performing an optimized hot spot analysis. After determining potential invasiveness and risk assessment, we measured the disturbance of biodiversity in the aquatic ecosystem. The result of distribution analysis indicates that the population of M. salmoides was concentrated in the major basins of Han river, Geum river, Nakdong river, and Yeongsan-Seomjin river, including the Jeju island. In particular, Nakdong river basin showed the highest appearance rate. On the contrary, Yeongsan-Seomjin river basin showed the lowest appearance rate. The Nakdong river and the Nakdong river basin were the areas with the high spatial concentration of M. salmoides. On the other hand, only Han river basin and Geum river basin had the lowest spatial concentration. The fish invasiveness screening kit(FISK) was used to assess M. salmoides, which inhabited a broad region of aquatic ecosystem: the assessment score was 31.0, indicating its 'highly invasive' nature. Our study aims to encourage research that improves the biodiversity and the conservation of M. salmoides in a priority area.

• Proceedings of the Korea Society of Environmental Biology Conference
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• 2002.11a
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• pp.41-45
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• 2002

광양만의 지형변화 및 퇴적환경발달양상에 대해 표층퇴적물과 지층탐사자료를 이용하여 연구하였다. 광양만 해역은 1970년대이후 광양만 개발에 따라 해안선 및 해저지형이 급격한 변화를 겪어왔다. 광양만의 면적은 개발이전보다 25%정도 감소하였다. 해안선 변형은 공단건설을 위한 해안매립공사로 인해 그리고 해저지형변화는 대형선박들의 안전항로개발을 위한 해저퇴적물의 준설 등에 의해 발생하고 있다. 표층퇴적물는 점토질 퇴적물 묘도서측 및 여수해만의 외해지역에 주로 분포하고, 사질 퇴적물은 섬진강하구와 수로에 분포하고 있다. 표층퇴적물의 유기물 함량은 퇴적물의 특성을 반영하며, 특히 점토질퇴적물에 다량으로 포함하고 있다. 탄성파 단면도상에서 기반암위에 Unit II와 Unit I가 분포하며, 하부 Unit II는 홀로세 이전의 하천환경 퇴적층으로 판단되며, 홀로세 Unit I 퇴적층은 섬진강하구에서 외해를 향해 전진퇴적양상의 쐐기형태를 보인다. 이 층은 섬진강에서 유출된 퇴적물이 델타환경을 이루면서 형성된 퇴적층서로 해석된다. Unit I 퇴적층내에 천부가스층이 광범위하게 분포한다. 천부가스는 광양만의 생태환경에 영향을 미칠 것으로 판단된다. 광양만 주변의 재발에 따른 해안 및 해저지형의 급격한 변형은 퇴적환경 및 해양환경에 변화를 야기할 것으로 예상된다. 특히 섬진강 하구지역의 광양제철소 건설은 섬진강에서 장양만으로 유입되는 퇴적물의 퇴적작용의 커다란 영향을 미칠 것으로 판단된다.

• Korean Journal of Ecology and Environment
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• v.51 no.4
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• pp.345-353
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• 2018

Hibernation is regarded as a physiological and behavioral adaptation that permits the survival of animals such as bats during seasonal periods of energy shortage. This study investigated the hibernation period of Plecotus ognevi in the temperate climate zone and the relationship between the thermal preference and hibernating process of bats. We hypothesized that the hibernation period of bats is closely related to the external temperature and temperature preference of bat species in the temperate region. To verify this hypothesis, we surveyed the distribution of the P. ognevi population in South Korea, and the temperature preference and the characteristics of hibernacula of P. ognevi. We predict that hibernation in the bat will begin when the external temperature drops below the thermal preference of the species and will leave from hibernation when the external temperature is higher than the thermal preference. P. ognevi hibernated in roosts maintained in low temperature ambient conditions with $-3.5{\sim}7.5^{\circ}C$). The body temperatures (averaged $3.01{\pm}1.30^{\circ}C$, ranged $0.1{\sim}7.8^{\circ}C$) of hibernating bats were closely related to the rock surface temperatures rather than the ambient temperatures. The bats began to hibernate in late November and final arousals occurred in mid-March, so that the total length of the hibernation was 115~120 days. The period of hibernation was strongly influenced by fluctuations in the external mean temperature. This study suggests that the onset and termination of P. ognevi hibernation is due to the interaction between the temperature of the hibernacula and that of the external environment and is based on the thermal preference of the bats. The study also suggests that the hibernation strategy such as thermal preference and hibernation periods of this species affect to distribution as bat species adapting to a severely climate.

• 산림경영
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• s.189
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• pp.20-21
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• 2008

국립수목원(원장 박종서) 보전 복원 연구팀은 그 동안 금강산에서만 분포하는 것으로 알려진 버들개회나무(물푸레나무 과(科))의 자생지를 강원도 남부지방에서 발견하였다고 밝혔다. 국립수목원은 현재 버들개회나무의 생태학적 및 유전적 도태 가능성에 대비하여 현지내 외 보존을 위한 대책 마련을 추진중에 있다.

• 어항어장
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• s.75
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• pp.44-50
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• 2006

대수심 침체어구 조사장비는 동해안 깊은 바다의 침체어구 수거에 활용하여 수거효율을 증대시켜 해저환경을 복원할 수 있을 것으로 기대되며, 또한 유령어업 실태에 대한 과학적 조사방법도구로 사용할 수 있을 뿐만 아니라 대수심 해저면 어족자원 분포조사 및 생태조사에 활용될 수 있을 것으로 기대된다.