• 한국해양공학회지
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• 제15권1호
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• pp.36-44
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• 2001

To predict the influence on fish stocks which were caused by environmental change in the fishing ground of shallow sea areas, we have developed the Shallow-Sea Ecological Model(SSEM) which that focuses on living organisms, especially fish and benthos. By applying the SSEM in the Seto-Inland Sea of Japan, we have simulated another aspect of influence on fish stocks that was caused by oxygen deficient water mass and nutrient loads. From the simulated result of the fish stocks, it was indicated that the stock of fish and benthos has shown a relative difference between the western sea and the eastern sea in the Seto-Inland Sea. According the to prediction, results of fish stocks that were caused by oxygen deficient water mass, it was estimated that the pelagicfish stock increases about 6 %, whereas the stocks of demersalfish and benthos decreases about 30% and 70%, respectively. On the other hand, it seemed that there was an increased in the fish stocks of demersalfish and benthos in the eastern sea of Seto-Inland Sea by nutrient loads reduction.

• 한국환경과학회지
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• 제16권3호
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• pp.277-285
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• 2007

The purpose of this study is to analyze seasonal distribution of insects, birds, fishes, and benthos for Gongji stream in Chuncheon and to explore some strategies towards creating a desirable close-to-nature stream. The number of species occurred in the study stream was 23 for butterflies and 149 for other insects, 23 for birds, 15 for fishes, and 47 for benthos. The study stream was dominated by Artogenia rapae, Polygonia caureum, Cyntia cardui for butterflies, and Passer montanus, Anas crecca, Anas platyrhynchos for birds. The dominant species were Rhynchocypris oxycephalus, Zacco plutypus, Carassius auratus for fishes, and Limnodrilus sp. 2, Chiranumus sp. 2, Hydropsyche KUb for benthos. Attracting insect species of higher density requires planting of host plant species and stabilization of plant coverage against disturbances. To enhance species diversify and density of birds, it is desirable to provide diverse habitats including preservation of downstream wetland and natural vegetation, creation of sand bars and islands with sand and gravel, and restriction or traffic passing and parking. Restoring fish and benthos habitats needs improvement of water quality, layout of gravels and stones on sand-dominant streambed, and use of close-to-nature revetment techniques.

• Ocean and Polar Research
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• 제43권2호
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• pp.73-88
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• 2021

The community structure and health status of macrobenthos assemblages were investigated in the subtidal area of the Nakdong River estuary, Southern Coast of Korea. Benthic fauna samples were collected seasonally at 8 stations in the subtidal area of the Nakdong River estuary from February 2013 to October 2015. During the survey, a total of 380 species and 4,603 ind./m² of macrobenthos in all sampling areas were collected. The major dominant species were the polychaetes Minuspio japonica, Pseudopolydora kempi, Heteromastus filifomis, Capitella capitata, the amphipod Grandidierella japonica and the bivalvia Arcuatula senhousia. Some species of polychaetes found in the study area consisted of opportunistic species that showed high densities when habitat condition was poor. On the other hand, macrobenthos assemblages in the study area were divided into brackish water and marine groups. Abundance was high in the brackish group, while the number of species and diversity index were high in the oceanic group. The three indices (AMBI, M-AMBI, and BHI) in the assessment of health levels based on the ecological characteristics and number of species in macrobenthic were commonly shown to be in good condition in the group of oceanic stations, while relatively poor conditions were reflected in the group of brackish stations. Compared to other indices, the M-AMBI index of the three indices for health assessment was considered to be a relatively more suitable one to assess benthic ecological conditions.

• 수산해양교육연구
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• 제19권3호
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• pp.491-501
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• 2007

This study deals with bottom debris and benthos which have obtained by using a beam trawler in Chinhae bay, Korea. The temperature and salinity didn't impact on the fish species and weights in the bay. But bottom debris is dominated on the precipitation into the bay. And it also was nearly very soiled owing to geographical condition of semi-enclosed bay. Moreover, all debris was not related on the quantitative variability of benthos. On the other hand, it was revealed to be reverse-correlative with fish species and positive-correlative with fish weights.

• 생태와환경
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• 제49권2호
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• pp.80-88
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• 2016

영흥도 인근 갯벌의 저서 먹이망 구조를 파악하고, BMA가 저서동물에 대한 먹이원으로써의 중요성을 파악하기 위하여 저서동물 (이매패류, 갑각류, 복족류, 어류)과 먹이원의 탄소 및 질소 안정동위원소비를 분석하였다. 먹이원의 후보인 POM, BMA, 잘피 (Z. marina)와 해조류의 탄소 안정동위원소비는 -26.5‰에서 -8.4‰로 넓은 범위를 보였으며, 저서동물의 탄소 안정동위원소비는 -17.8‰에서 -12.1‰로 먹이원의 탄소 안정동위원소 범위 내에 존재하였다. 해조류 중 녹조류와 SOM을 제외한 먹이원의 질소 안정동위원소비 ($5.7{\pm}1.0$‰)는 저서동물($11.8{\pm}1.9$‰)에 비하여 가벼운 것으로 나타나, 기존의 연구와 유사한 경향을 보였다. 탄소와 질소 안정동위원소비 분석을 통하여 저서동물은 세 그룹으로 나누어질 수 있음을 확인하였으며, 이는 각 그룹 내 저서동물의 먹이원 및 생태적 지위가 유사함을 의미한다. 또한 각 그룹에 대한 BMA의 먹이 기여도가 매우 큰 것으로 파악되었으며 이와 같은 연구 결과를 통해서 영흥도 조간대 갯벌 생태계에 있어 BMA가 가장 기초적인 생물자원이라는 것을 확인할 수 있었다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제12권4호
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• pp.16-24
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• 2007

시화호 저서생태계의 비용효과적 복원을 위한 퇴적토 관리 대안을 제시하기 위하여 시화호 내 오염퇴적물의 현황 및 저서생태계 특성에 대한 조사와 퇴적물 관리 기준과 사례 연구가 수행되었다. 미국해양대기청의 퇴적물환경권고기준에 따라 시화호 퇴적토의 중금속 오염도를 평가한 결과 13개 조사지점 중 반월/시화 산단과 인접해 있는 4개 지점의 퇴적토가 2개 이상의 중금속에서 ERL (Effects Range Low : 저서생물 10%에 악영향을 끼칠 수 있는 농도)을 초과하는 것으로 나타났다. 그러나 미국 워싱턴 주와 네덜란드에서 정하고 있는 퇴적토 제거기준은 초과하지 않는 것으로 나타났다. 반면에 유기물 및 황화물 오염의 관점에서 개발된 일본 나고야항과 동경만/요코하마만의 퇴적물 제거기준에 의하면 시화호 표층 퇴적물 대부분이 제거대상인 것으로 나타났다. 한편 저서생물의 조사결과 Polydora ligni (얼굴갯지렁이)와 Musculista senhousia (종밋)와 같은 오염지시종이 우점종으로 출현하였으며, 이로 미루어 유기물 오염에 의한 여름철 용존산소 고갈 및 황화수소 생성등이 일반적인 저서생물의 건강한 성장을 크게 저해하는 것으로 판단되었다. 유기물, 황화물 및 중금속과 오염퇴적토가 주변지역에 미치는 영향을 종합적으로 고려한 결과 일부 지역은 우선적으로 퇴적토 정화가 이루어져야 할 것으로 판단되었다.

• 한국환경생물학회:학술대회논문집
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• 한국환경생물학회 2001년도 학술대회
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• pp.45-45
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• 2001

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.330-330
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• 2002

The combination of Multi-Beam Echo Sounder swath bathymetry and high-resolution towed Sidescan sonar provides a powerful method of examination about hydrographic survey results. In this paper, we investigate the fast method of 3D bathymetric reconstruction with the Digital Sidescan sonar(Benthos SIS 1500) and Shallow Multi-Beam Echo Sounder(Reson Seabat 8125). The Seabat 8125 is a 455KHz high resolution focused Multibeam echo sounder(MBES) system which measures the relative water depth across a wide swath perpendicular to a vessel's track. The Benthos SIS1500 is a chirp(nominal fq. 200KHz) sonar which map the topographical features & sediment texture of ocean bottom using backscattered amplitude. We generates the very large 3D bathymetric texture mapping model with the Helical System's HHViewer and describes additional benefits of combining MBES and Sidescan Sonar imagery, the removal of geometric distortions in the model and a deterministic sounding noise.

• 한국어류학회지
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• 제24권4호
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• pp.272-277
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• 2012

거문도 연안해역에서 채집된 말쥐치(Thamnaconus modestus) 172개체의 식성을 분석하였다. 말쥐치의 표준체장 (SL)은 16~39 cm 범위였다. 말쥐치의 위내용물을 분석한 결과 곤봉바다맨드라미류 (Neptheidae), 해조류 (Algae), 만각류 (Thoracica), 복족류 (Gastropoda)와 같은 저서생물 (benthos)을 주로 섭식하는 잡식성(Omnivore)어류였으며, 그 외에 해면류 (Desm ospongia), 단각류 (Amphipoda) 등도 섭식하였지만 그 양은 많지 않았다. 말쥐치는 섭식형태와 특성을 분석한 결과, 다양한 먹이생물을 섭식하는 섭식일반종 (generalist)이었다. 체장 33 cm 이상의 체장군을 제외한 전 체장군에서는 곤봉바다맨드라미류와 해조류의 섭식율이 높았다. 체장 33 cm 이상의 체장군에서는 만각류의 섭식율은 증가 하였으나, 곤봉바다맨드라미류의 섭식율은 감소하였다. 체장 33 cm 이상의 개체군에서는 0.34의 값을 보여 낮은 중복도를 나타냈으며, 그 외의 체장군에서는 0.6 이상의 값을 보여, 비교적 높은 중복도를 보였다.

• 한국수산과학회지
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• 제47권6호
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• pp.908-926
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• 2014

This study investigated the community structure and health assessment of macrobenthic assemblages in Wonmun Bay, in the southern coast of Korea. The total number of species and mean density were 170 species and $1,269\;indivuduals/m^2$, respectively. The major dominant species were the bivalve Theora fragilis ($230{\pm}446\;indivuduals/m^2$) and the polychaetes Lumbrineris longifolia ($180{\pm}339\;indivuduals/m^2$), Sigambra tentaculata ($124{\pm}153\;indivuduals/m^2$), Paraprionospio patiens ($104{\pm}293\;indivuduals/m^2$) and Capitella capitata ($82{\pm}223\;indivuduals/m^2$). Community statistics [cluster analysis and nonmetric multidimentional scaling (NMDS) ordination] revealed that the macrobenthic community structure in the study area was classified into three station groups for both seasons. Several biotic indices based on macrobenthic communities have been developed to assess the ecological quality of coastal ecosystems. In this study, the ecological status was assessed by four biotic indices Shannon's H', the AZTI Marine Biotic Index (AMBI), multivariate-AMBI (M-AMBI) and the Ecological Conservation Index (ECI). The ecological statuses of the macrobenthic communities in Wonmun Bay were poorer in the summer than in the spring. The results of the present study indicate that three biotic indices ( i.e.; Shannon's H', M-AMBI and ECI ) were better correlated with bottom dissolved oxygen than the AMBI in Wonmun Bay.