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RISS 인기검색어
- 검색키워드
- 주제어 : fossil diatom (검색결과 7 건)
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윤석민,이태희,정승원,박준상,이진환 한국해양과학기술원 2017 Ocean science journal Vol.52 No.3
The fossil diatom assemblage record from two sediment cores obtained from the Ulleung Basin, East Sea, Republic of Korea, revealed changes in the diatom assemblage zones in PG1 and PD3 core samples. The two sediment cores were δC14 dated and approximately represented the late Pleistocene–Holocene. The analysis of age zones in the PG1 core and PD3 core was assessed based on the frequency of variations, and occurrences of biostratigraphical fossil diatom species. During the Last Glacial Maximum (LGM), the sea level was lower than that at present and the Ulleung Basin became isolated from the Pacific Ocean. As a result, there would have been a limited Tsushima Warm Current (TWC) influence, and salinity would have decreased resulting in increased freshwater and coastal diatoms. The distribution pattern of diatoms presented in the cores was associated with changes in water temperature and salinity and the adding of terrigenous material brought about by the input of freshwater. Changes in the abundance of a tychopelagic diatom, Paralia sulcata, reflected the effect of the water currents. Diatom temperature (Td) values and the ratio of centric/pennate diatoms provided evidence of limited influences of the TWC and freshwater inflow. It is thought that all assemblage zones were influenced by the TWC, which had an important effect on the distribution and composition of fossil diatoms.
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고대 저수지 공검지의 홀로세(Holocene) 시기 퇴적층에 분포하는 국내 미기록 화석 돌말류 보고
이상득,박미례,박채홍,이호일,이진영,이창수 한국조류학회I 2023 수생생물 Vol.3 No.2
Gonggeomji, located in Sangju, is an ancient reservoir that is said to have been built during the Three Han Dynasties to provide water for agriculture. It has been known as one of the oldest reservoirs in history, along with Uirimji reservoir in Jecheon-si, Susanje reservoir in Miryang-si, and Byeokgolje reservoir in Gimje-si. In this study, core samples from two locations, 19GG01 and 19GG02, in the Gonggeomji reservoir were analyzed for taxonomic studies on diatoms distributed in sedimentary layers from the Holocene period. As a result, 16 species of diatoms (Cosmioneis hawaiiensis, Cymbopleura apiculata, Gomphonema contraturris, Hantzschia vivacior, Haslea nautica, Navicula neomundana, Neidium krasskei, Pinnularia interuptiformis, Pinnularia platycephala, Pinnularia rexlowei, Placoneis scharfii, Stauroneis acidocli-natopsis, Stauroneis fuegiana, Stauroneis kootenai, Stauroneis pikuni, Tabellaria flocculosa var. linearis) that had not been reported in Republic of Korea were discovered for the first time. The morphological characteristics of 16 species were analyzed through observation with a light microscope or a field emission scanning electron microscope, and the description was written. In addition, previously reported distribution information around the world was presented, and the age and paleoenvironment of the sedimentary layers where each species was discovered in the test site were reviewed. The Korean names were presented for 11 genera including 16 newly recorded diatom species. As a result of this study, a total of 36 newly recorded species have been reported in in the Gonggeomji reservoir. It is significant that various diatoms that had not been recorded in Republic of Korea until now were discovered in past sedimentary layers. 상주시에 위치한 공검지는 삼한시대에 농업용수를 제공하기 위해 축조된 것으로 전해지는 고대 저수지로, 제천의 의림지, 밀양의 수산제, 김제의 벽골제와 함께 역사적으로 가장 오래된 저수지 중의 하나로 알려져 왔다. 본 연구에서는 홀로세(Holocene) 시기 퇴적층에 분포하는 돌말류에 대한 분류학적 연구를 위해, 공검지에서 두 지점(19GG01, 19GG02)의 코어시료를 분석하였다. 그 결과 그동안 국내에 보고되지 않은 16종의 돌말류(Cosmioneis hawaiiensis, Cymbopleura apiculata, Gomphonema contraturris, Hantzschia vivacior, Haslea nautica, Navicula neomundana, Neidium krasskei, Pinnularia interuptiformis, Pinnularia platycephala, Pinnularia rexlowei, Placoneis scharfii, Stauroneis acidoclinatopsis, Stauroneis fuegiana, Stauroneis kootenai, Stauroneis pikuni, Tabellaria flocculosa var. linearis)가 처음으로 발견되었다. 광학현미경 또는 전계방사형주사전자현미경 관찰을 통해 16종의 형태학적 특징을 분석하였으며, 기재문을 작성하였다. 더불어 기존에 보고되어 있던 전 세계의 분포 정보를 제시하였고, 공검지에서 각각의 종이 발견된 퇴적층의 연대 및 고환경에 대해 고찰하였다. 16종의 미기록 돌말류가 포함되는 11속에 대해서는 국명을 제시하였다. 본 연구 결과를 통해 공검지의 퇴적층에서는 그동안 총 36종의 국내 미기록종이 보고되었으며, 이는 현재까지 우리나라에서 기록되지 않았던 다양한 돌말류가 과거 담수 퇴적층에서 발견되었다는데 큰 의의가 있다.
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우포늪의 홀로세 동안 퇴적환경 변화 및 돌말류 분포 특성
이호일,이상득,이진영,임재수,권대률,박미례,윤석민 한국하천호수학회 2020 생태와 환경 Vol.53 No.2
Upo Wetland is the largest riverine wetland in Korea which has been inscribed on the Ramsar List of Wetlands of International Importance in 1998. In this study, sedimentological study was carried out in order to understand the environmental changes in Upo Wetland during the Holocene. The drilling work for recovering the Quaternary sediments was conducted on the inner part (UPW17-01, UPW17-02, and UPW17-03) and the outer part (UPL17-01, UPL17-02) of the Upo Wetland. The recovered sediments are commonly characterized by gravel-dominated deposits in the lower part and silty clay-dominated deposits in the middle to upper parts respectively, which are seemed to be changed from fluvial to palustrine/lacustrine environments around 4,000 cal yr BP. In order to establish the Holocene diatoms distribution from Upo Wetland, we identified 63 diatom taxa. Of these, 14 species were new records for Korea: Gomphonema consector, Gomphonema jadwigiae, Hantzschia abundans, Luticola pseudomurrayi, Luticola spauldingiae, Neidium suboblongum, Ninastrelnikovia gibbosa, Oricymba rhynchocephala, Pinnularia borealis var. lanceolata, Pinnularia latarea, Pinnularia paliobducta, Pinnularia saprophila, Sellaphora laevissima, Stauroneis pseudoschimanskii. All identified diatom species are illustrated by high-quality scanning electron microscopic and light microscopic microphotographs. The ecological habitat for all taxa are presented.
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New recorded diatoms in Holocene sediment cores from the Gonggeom-ji Wetland in Korea
권대률,박미례,이호일,Jin-Young Lee,이상득 한국현미경학회 2023 Applied microscopy Vol.53 No.1
The Gonggeom-ji reservoir is an agricultural one built for rice farming during the Proto-Three Kingdoms period and was designated as Gyeongsangbuk-do monument No. 121 because of its high historical value. The Nakdonggang National Institute of Biological Resources has been conducting paleontological and paleoenvironmental studies on major wetlands from Korea since 2016, as well as diatom, geological, and depth distribution analyses on the sedimentary soil of Gonggeom-ji. This study summarized the description and ecological characteristics of six newly recorded diatoms ( Gomphonema lacusrankala, Pinnularia diandae, P. gibba var. hyaline, P. lacunarum, Sellaphora labda var. nipponica, Stauroneis angustilancea ) found in samples collected through drilling in Gonggeom-ji in 2019.
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