• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.90-90
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• 2017

물리서식처 분석 하천에서 유량에 따른 수심, 유속, 기층 등의 물리서식처 조건의 변화가 서식처 적합도에 미치는 영향을 수치모의를 통하여 분석하는 방법이다. 기존 물리서식처 분석은 어류를 중심으로 수생태계 평가 및 생태유량산정 등의 다양한 하천관리 문제에 적용되었다. 어류의 경우 수생태계의 최상위 포식자이며 상대적으로 모니터링하기에 용이하고 수생태계에 빠르게 반응하고 이동 및 이주가 단기간에 나타나는 특징이 있다. 또한 상업 및 레크리에이션으로의 활용도가 높기 때문에 사회적인 이목이 어류로 집중되었다. 따라서 많은 연구들이 어류를 중심으로 물리서식처 분석을 실시하였으며, 저서무척추 동물에 대한 분석은 미흡한 실정이다. 저서무척추 동물은 어류의 중요한 먹이원이자 수생태계의 건강성을 나타내는 중요한 지표로 활용되고 있으므로, 수생태계의 통합 및 먹이사슬의 보존을 위하여 저서무척추 동물에 대한 물리서식처 평가는 중요하다. 이 연구의 목표는 하천에서의 저서무척추동물의 군집을 평가할 수 있는 서식처모형을 제시하는데 있다. 이를 위해 저서무척추 동물을 서식기능군에 근거한 기는무리, 붙는무리, 헤엄치는 무리, 굴파는 무리로 분류하여 서식처 적합도 지수를 제하고 보철거 사례에 적용하여 모형의 검증성을 확인하였다.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.5 no.2
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• pp.146-156
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• 2000

Zonation pattern of macro-invertebrate community structure was examined from Okjukpo sandy beach, Taechongdo, Korea. Macrofauna were collected in June 1998 using a can corer from ten stations along one transect. Mean grain size ranged from 1.97 to 2.23${\phi}$ and sediment organic contents ranged from 0.52 to 1.02%. A total of benthic macro-invertebrates comprised 25 species, providing 10,705 individuals and 89.13 g wet weight in biomass. Peracaridean crustaceans such as amphipods and isopods are the most prominant components in this exposed sandy beach. The dominant species were Eohaustorius setulosus (33%), Excirolana chiltoni (26%), Haustorioides koreanus (12%), Platorchestia crassicornis (8%), and Cycladicama cumingii (6%). The zonation patterns by these animals were very similar to those noted by Dahl(1952) and Jo(1990). They are divided into three faunal zones: 1) subterrestrial fringe dominated by a talitrid amphipod Platorchestia crassicornis, 2) midlittoral zone by a cirolanid isopod Excirolana chiltoni, 3) sublittoral fringe by more diverse amphipods communities.

• 한국해양학회지
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• v.27 no.1
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• pp.78-90
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• 1992

The present study is aimed to investigate the relationship between the distribution of benthic macro fauna and environments in the Mangyung-dongjin tidal flat developed on the west coast of central korea. Samples were taken from 69 sites established on 8 transect lines running perpendicular to the coast. The 69 sites located in the range of -250 to 230 cm height from the mean sea level were categorized into 4 levels of exposure duration. The mean grain sizes of the surface sediments varied from 1.5 to $7.9{\varphi}$. Silty sands and sands were dominant sediment facies on the tidal flat. A total of 64 species of invertebrates was collected and the mean density was $1,335{\;}indiv{\cdot}\textrm{m}^2$. The dominant species was Laternula cf. limicola of Bivalvia (71% of total counts), followed by Umbonium thomasi of Gastropoda (22%), and Lingula anatina of Brachiopoda (2.6%). These 3 species comprised 95.5% of total individual number. The distribution of benthic animals was closely related with the duration of tidal exposure. Perinereis association was the characteristic for the most exposed area, and followed by Macrophthalmus and Bullacta-Mactra-Umbonium association along the degree of exposure duration.

• Korean Journal of Ecology and Environment
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• v.36 no.1 s.102
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• pp.29-37
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• 2003

Benthic macro-invertebrates were seasonally collected in the Onchen Stream in Pusan, from July 2001 to March 2002. Generally 4 phylum 5 class 10 order 19 family 23 species were observed in the study sites. Ephemeroptera, Plecoptera and various species appeared in headwater stream while Oligochaeta and Chironomidae were dominated in downstream sites. Community abundance patterns, especially the dominant taxa, Oligochaeta and Chironomidae, appeared to be different depending upon the sampling months. Oligochaeta was usually observed in July, December and March while Chironomidae was appeared in September. The biological indices, TBI(Trent Biotic Index), BS (Biotic Score), BMWP (Biological Monitoring Working Party)were calculated with the appeared communities of the sampling sites through the survey months. TBI showed 1 to 8, BMWP was 1 to 93 and CBI appeared 9 to 387 in the different sites. The biological indices decreased from headstream to downstream sites, We implemented the unsupervised Kohonen network for patterning of community abundance of the sampling sites. The patterning map by the Kohonen network was well represented community abundance of the sampling sites. Also, we conducted RTRN (Real Time Recurrent Neural Network) for predicting of the biological indices in the different sites. The results appeared that the predicting values by RTRN were well matched field data (correlation coefficient of TBI, BMWP and CBI were 0.957, 0.979 and 0.967, respectively).

• Korean Journal of Environment and Ecology
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• v.23 no.4
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• pp.353-364
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• 2009

This study was conducted to evaluate the effect of erosion control works on the stream ecosystem in a mountain torrential stream. The species composition of benthic macroinvertebrates and biological water quality were investigated before and after construction of erosion control works at 5 sites. The total number of benthic macroinvertebrates before construction was 3,086 individuals including 4 phyla, 6 classes, 11 orders, 22 families, and 25 species, but after construction it has decreased to 1,208 individuals including 4 phyla, 6 classes, 10 orders, 17 families, and 19 species. Especially, the diversity, richness, and evenness indices, which were calculated based on existing number of biological species, have decreased or not produced at the erosion control sites, where biological species were not found or the minimum number of species were found. The results of community analysis of benthic macroinvertebrates and ESB(Ecological Score of Benthic macroinvertebrate community) indicated that the environmental qualities of the stream based on saprobity, environmental condition, and water quality decreased after the construction at all sites: before construction, the top of the stream was satisfactory and some satisfactory, the middle was some defectiveness, and the lower was defectiveness and very defectiveness; after construction, all parts of the stream except some parts of the top were very defectiveness. Moreover, the water quality of torrential stream was rated between I to III before construction, but after construction, it declined to $IV{\sim}V$ except control. The habitat damage of benthic macro invertebrates occurred at all investigation sites after the construction of erosion control works led to reduction of the number of biological species and water quality deterioration. The results reported in this study were collected directly after the construction of erosion control works. Therefore, additional studies are needed to further explore the effect of disaster-prevention of erosion control works and the recovery process of stream ecosystem through long term monitoring.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.17 no.2
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• pp.93-108
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• 2014

The inventory list of wildlife species inhabiting or distributing in Gyeonggi Province was made by compiling species data from precedent surveys, 10 national level nature surveys, 1 survey that Gyeonggi-do conducted, and 46 local surveys presented in scientific journals. Total 2,913 wildlife species including 2,041 vascular plants, 39 mammals, 304 birds, 34 herptiles, 145 fish, and 350 benthic macro-invertebrates were listed in the inventory. It explains 47% of nationwide total species in vascular plants, 31.5% in mammals, 58.2% in birds, 65.4% in herptiles, 12.2% in fish. The total number of important species including endangered species, national monuments, national red lists, etc. was 628 species, accounting for 21.6% of all listed species in Gyeonggi Province. More than 90% of endangered bird species, almost half of endangered fish and herptile species were found in Gyeonggi Province. In particular, abundant bird diversity and inhabitation of many endangered bird species were identified in Gyeonggi Province. Species diversity was greater in the northern area adjacent to the Demilitarized Zone and the eastern forest area. The distribution of the important species such as national endangered species was more distinct in these areas, especially in Gapyeong and Yeoncheon Counties. The inventory list compiled in this study implicates the level of management for biological resources and can provide information for policy decisions regarding new survey sites, protection management of specific species and areas, management practices by spatial characteristics. It should be more compiled and updated with survey data to be utilized as basic indices for local biodiversity strategies and management of biological resources.

• Korean Journal of Ecology and Environment
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• v.44 no.4
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• pp.396-406
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• 2011

To analyze between water quality and community structure of benthic macroinvertebrates, we selected four reservoirs (Lake Sayeon, Lake Daeam, Seonam reservoir and Lake Hoeya) in Ulsan-si and studied them from February 2010 to October 2010. The annual mean BOD (Biochemical Oxygen Demand) in the four lakes was $14.2mg\;L^{-1}$, and Seonam reservoir had the highest deviation in BOD. The maximum BOD for every lake was in February and their minimum in May, except for Lake Hoeya whose minimum was in July. The means of various nutrients were as follows: TN $0.051mg\;L^{-1}$, TP $0.100mg\;L^{-1}$, $NH_3-N\;0.606mg\;L^{-1}$, and $NO_3-N\;0.014mg\;L^{-1}$. The maximum TN was measured in June and the maximum and minimum TP were measured in March and in May respectively in the four lakes. Benthic macroinvertebrates were surveyed in April and October 2010. The number of benthic macroinvertebrates species was in the range of 16~36 and the average number of individuals were 58~208 inds. $m^{-2}$. Seonam reservoir, which has the highest mean TN ($0.082mg\;L^{-1}$) and $NO_3-N$($0.023mg\;L^{-1}$), had the largest number of species (36 species, 208 inds. $m^{-2}$). Pearson's correlation between the number of macro invertebrates species and TN was 0.962 (P<0.05), and between the species and $NO_3-N$ was 0.999 (P<0.05). These results show that the number of benthic macroinvertebrates species of the four lakes in Ulsan-si is significantly correlated with TN and $NO_3-N$.

• Journal of Wetlands Research
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• v.18 no.4
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• pp.378-385
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• 2016

This study aims to suggest the framework of functional assessment on lotic area based on HGM(Hydrogeomorphic) approach targeting Wetland Protected Areas which are in the type of river channel, and to set up the fundamental data as a reference wetland. A total of 10 factors in terms of hydrology, biogeochemistry, plant habitat and animal habitat was analyzed based on the original approach of HGM and each Functional Capacity Index(FCI) of those factors was calculated. As the result of the modified FCI analysis, Damyang riverine wetland which is with artificial river bank had high values in the variables of area ratio of actual vegetation in the foreland, the number of plant per area and the area ratio of Salix spp., and those values were highly reflected on the factors of Nutrient Cycling(947,668.00), Species Richness and Maintain Characteristic Plant Communites(6.39) and Maintain Spatial Structure of Habitat(11.00). The Hanbando wetland which is keeping the natural bank had higher values in the variables of structural scale and species diversity, and the those values were highly reflected on the factors of Energy Dissipation(17,805.16), Subsurface Storage of Water(0.54), Removal of Imported Elements and Compounds(103,052.73), Maintain Characteristic Detrital Biomass(2.31), Maintenance of Interspersion and Connectivity (6.50), Species Diversity of Benthic macro-invertebrates(1.60) and Species Diversity of Vertebrate & Species Number of Other Animals(2.52/ 151.50), compared to the Damyang Riverine Wetland.

• 한국해양학회지
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• v.30 no.5
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• pp.442-457
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• 1995

The relationships of environmental factors to the distribution patterns of the three species of ophiuroids, Ophiura kinbergi, O. sarsi and ). sarsi vadicola from Yellow Sea southeast seas and East Sea of Korea were studied to characterize their habitual niches. These three species chosen for study illustrated distinct niche and patterns according to their various preferences mainly for bottom water temperature, bottom water salinity and depth from seven environmental variables which were depth, bottom water temperature and salinity, density, bottom water oxygen content, grain size of the surface sediment, and sediment sorting coefficient. The results of habitat niche study mainly dealing with O. sarsi vadicola suggested that the optimum habitat rages were approximately 6$^{\circ}C$∼10$^{\circ}C$ in bottom temperature and 31%∼33.5% in bottom water salinity which also corresponded with the characteristic ranges of Yellow Sea Bottom Cold Water and higher probabilities of occurrence (more than 70%) were found in depth ranging from 100 to 200 m. In addition, the habitats of O. kinbergi and O. sarsi were compared with that of O. sarsi vadicola. Their ranges of habitat niches were found to have different niches in physical space of bottom water temperature, bottom water salinity and depth. Based on the distribution pattern of O. sarsi vadicola in the Yellow Sea, the ecological barrier which confined the distribution of benthic macro-invertebrates in southern Yellow Sea was determined to be the Yellow Sea Warm Current (approximately 34% < and 18$^{\circ}C$ in December) which occurs between 33$^{\circ}$ and 34$^{\circ}$N of southern Yellow Sea in winter time.