• 환경생물
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• 제22권3호
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• pp.456-463
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• 2004

2003년 8월 3일부터 8월 5일까지 전라북도 군산시에 속한 고군산군도의 5개 섬을 대상으로 조간대 및 조하대와 어선의 그물에서 채집된 십각류를 관찰한 결과 새우류 2과 4종, 집게류 4과 9종, 게류 11과 29종으로 모두 17과 42종이 동정, 분류 되었다. 이 가운데 새우류 2종, Athanas sp., Alpheus sp.는 한국미기록종이었으며, 이들을 포함하여 10과 20종-새우류 1과 2종, 집게류 3과 6종, 게류 6과 12종-이 고군산군도 해역에서 처음 보고 되는 종들이었다. 따라서 과거 이 지역에서 보고 된 19과 52종에 10과 20종을 추가하여 총 72종이 보고 된다. 조사된 십각류 중에서 게류가 11과 29종으로 가장 다양했으며, 생물량은 새우류에서 줄새우아재비 [Palaemon(Palaemon) serrifer], 게류에서 칠게 (Macrophthalmus japonicus)와 엽낭게 (Scopimera globosa), 집게류에서 가시투성 어리게 (Hapalogaster dentata)가 가장 많았다.

• 환경생물
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• 제35권3호
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• pp.240-250
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• 2017

This taxonomic study sought to detect and describe diatom species not yet recorded in Korea. The study was conducted at three islands located off the western coast of Korea, Wido Island near Buan, Wonsando Island near Boryeong and Dekjeokdo Island near Incheon. Diatoms were collected from the bottom, stone, macrophytes and other substrates in water bodies, which are affected by seawater. Fifteen naviculoid taxa are described. Of these, 13 are novel to Korea. The genus Navicula has nine species; Navicula alineae Lange-Bertalot, N. ammophila Grunow, N. cariocincta Lange-Bertalot, N. elegantoides Hustedt, N. longicephala Hustedt, N. normaloides Cholnoky, N. notha Wallace, N. novaesiberica Lange-Bertalot, N. riediana Lange-Bertalot & U. Rumrich. The genus Craticula has four species; Craticula buderi (Hustedt) Lange-Bertalot, C. halophila (Grunow) D.G. Mann, C. riparia (Hustedt) Lange-Bertalot and C. riparia var. mollenhaueri Lange-Bertalot.

• 한국자원식물학회지
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• 제25권1호
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• pp.105-122
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• 2012

본 조사는 당진, 서산, 태안, 홍성, 보령, 서천 등 충남 도서지역의 관속식물 분포를 연구하기 위해 2010년 3월부터 11월까지 조사하였으며, 본 조사를 통해 확인된 조사지역 내의 소산 관속식물은 105과 326속 454종 4아종 45변종 9품종으로 총 512분류군으로 확인되었다. 조사지역내의 한국특산식물은 벌개미취, 키버들, 좀땅비싸리, 태안원추리, 새끼노루귀, 고광나무 등 총 6분류군으로 확인되었으며, 산림청지정 희귀 및 멸종위기 식물은 목련, 모감주나무, 먹넌출, 갯방풍 등 총 4분류군이 확인되었다. 식물구계학적 특정종은 I등급종은 50분류군, II등급종은 1분류군, III등급종은 11분류군, IV등급종은 4분류군, V등급종은 3분류군으로 총 69분류군이 확인되었다. 기후변화와 관련한 연구 결과에 의한 기준으로 보면 남방계가 14분류군, 북방계가 4분류군이 확인되었다. 귀화식물은 17과 46분류군으로 확인되었으며, 이는 조사된 전체 소산 식물목록 중 약 9.1%를 차지하고 있었다. 귀화식물은 군락을 형성하지 않은 상태로 주변 도서지역의 식생에 큰 영향을 주지 못하는 것으로 확인되었다. 하지만, 도서지역 간에 정기적으로 여객선이 오가며 관광객이 증가함에 따라 종수가 증가하고, 주변 도서지역에 많은 영향을 미칠 것으로 사료된다.

• ALGAE
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• 제28권1호
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• pp.53-62
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• 2013

Actinotrichia is a calcified galaxauracean red algal genus with temperate and tropical distributions in the Indian and Pacific Oceans. Morphological characteristics, along with rbcL and cox1 sequences, were analyzed from specimens collected in the western Pacific and the Indian Oceans. Both rbcL and cox1 data confirmed the occurrence of A. fragilis, A. robusta, and Actinotrichia sp. in this region. The presence of A. fragilis was verified in tropical Indo-Pacific and temperate northeast Asian waters and was characterized by high genetic diversity. Although A. robusta commonly occurs in the East China Sea, we confirmed its presence on rocks and crustose algae in the subtidal zone of three islands in the Andaman Sea. Actinotrichia sp. was similar to A. calcea in morphology and distribution, but with sufficiently different sequences, thus, additional sampling over the range will enable a more realistic evaluation of its taxonomic status.

• The Korean Journal of Ecology
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• 제24권4호
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• pp.219-222
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• 2001

The study was conducted to get the basic information for proper protection and management of black-faced spoonbill and their habitats in western coast of South Korea. The species was observed in 8 sites of western coast of South Korea in spring 2000. We confirmed breeding of this species at least 4 pairs in Seokdo island. This island is considered likely to be an imortant breeding site together with Yodo island, Hambakdo island and Yokdo island. Also, we observed breeding of herring gull in Seokdo island and small island nearby Boleumdo island for the first time in South Korea. Chilsando island, Cheonsuman bay and Gyeokyeolbiyeoldo island were considered as stopovers located on the Korean Peninsula route. The other sites were considered as summering sites of the black-faced spoonbill. Especially the birds were constantly observed from breeding season to postbreeding season in Seonduri and Yeochari of Ganghwado island. We have counted maximum 88 individuals gathered at Gaksiyeo in Seonduri and Yeochari on September 3, 2000. The species seemed to gather at these sites after breeding for migration to wintering ground in September. We also surveyed changes of the number of individuals as time of the ebb and flow on September 3 and 6, 2000, their time budgets were affected by the ebb and flow in these sites.

• 한국패류학회지
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• 제15권2호
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• pp.121-125
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• 1999

The present study aimed to elucidate whether and intestinal fluke, Gymnophalloides sp. exist in Gogunsan-gundo located at western part of Korean Peninsula; about 100 km apart from Gunsan city, Jeollabuk-do, Korea. The survey was carried out Two times each in 1997 and 1998, examining stool samples by means of formalin-ether concentration method. Results are summarized as follows : of 411 fecal samples examined, Gymnophalloides sp. positives were 19 (8.9%); 9.5% inMunyeodo, 1% in Seonyudo, but none in Jangjado. The positive cases did not show any specific clinical complaints. Prevalence rate of Gymnophalloides seoi metacercariae from oysters, Crassostrea gigas were 80.8%

• Journal of Advanced Marine Engineering and Technology
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• 제39권8호
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• pp.856-862
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• 2015

Tidal current energy is an important alternative energy resource among the various ocean energy resources available. The tidal currents in the South-Western sea of Korea can be utilized for the development of tidal current power generation. Tidal power generation can be beneficial for many fishing nurseries and nearby islands in the southwest region of Korea. Moreover, tidal power generation is necessary for promoting energy self-sufficient islands. As tidal currents are always available, power generation is predictable; thus, tidal power is a reliable renewable energy resource. The selection of an appropriate hydrofoil is important for designing a tidal current turbine. This study concentrates on the selection and numerical analysis of four different hydrofoils (MNU26, NACA63421, DU91_W2_250, and DU93_W_210LM). Blade element momentum theory is used for configuring the design of a 50 W class turbine rotor blade. The optimized blade geometry is used for computational fluid dynamics (CFD) analysis with hexahedral numerical grids. Among the four blades, NACA63421 blade showed the maximum power coefficient of 0.45 at a tip speed ratio of 6. CFD analysis is used to investigate the power coefficient, pressure coefficient, and streamline distribution of a 50 W class horizontal axis tidal current turbine for different hydrofoils.

• 동굴
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• 제92호
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• pp.1-7
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• 2009

세계동굴벽화로서 스페인의 알타미라 동굴벽화(Altamira Cave), 프랑스 라스코 동굴벽화 (Grotte de Lascaux), 프랑스 쇼베 동굴(The Chauvet Cave)에 대해서 논하고 한국의 고분벽화인 쌍영총과 청룡도에 대해서 논한다. 이 논문은 발견된 동굴 예술 중 Chamorro 문화와 조상 숭배에 우세하게 관계하는 것으로 북부 메리애나 군도의 동굴 예술의 개관을 제공하고, 몇 세기에 걸쳐 서양에서는 "선사 시대" 사람들인 메리애나 군도의 Chamorro 고대 주민으로 분류했다. 기록역사 없는 사람들인 북부 매리애나 군도의 동굴 예술 소개 제공 이외에, 이 논문은 고대 Chamorros 문화의 기록 역사가 있었고, 연대순 기록이 그들이 새긴 동굴 조각 및 상형문자에서 존재한다는 사실을 강조하고 있다.

• ALGAE
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• 제33권2호
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• pp.157-166
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• 2018

Cryptic species complexes are increasingly recognized in phycological research, obscuring taxonomy and raising questions about factors influencing speciation. A recent exploration of kelp genetic diversity on Haida Gwaii, British Columbia revealed the existence of a new species, Saccharina druehlii, which is cryptic with Saccharina sessilis. This suggests that molecular investigations further north may be required to elucidate the taxonomy and evolutionary history of this lineage. Although, for several decades, S. sessilis was considered a single highly variable species, its taxonomy has been far from straightforward. In particular, Hedophyllum subsessile (Areschoug) Setchell is now recognized as a synonym of S. sessilis in North America, but as a growth form of Saccharina bongardiana in Far East Russia. To resolve this taxonomic confusion, we sequenced mitochondrial (CO1-5P) and nuclear (internal transcribed spacer) markers of S. sessilis populations from the Aleutian Islands, Alaska, USA. Interestingly, none of our sequences matched S. sessilis sensu stricto. Instead, CO1-5P sequences from populations in the central and eastern Aleutians matched exactly S. druehlii with increasing sequence divergence occurring westward. Samples from Attu, the western-most island, composed a genetic group that clearly represents Kjellman's concept of Hafgygia bongardiana f. subsessilis and is distinct enough from S. druehlii and S. sessilis to potentially constitute a distinct species. Therefore, Saccharina subsessilis comb. nov. is proposed for this entity. Our results suggest the existence of a species complex at the crown node of S. sessilis and thus further investigation of Saccharina in Alaskan waters should be conducted to reconstruct the evolutionary history of this fascinating lineage.

• ALGAE
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• 제35권4호
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• pp.337-347
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• 2020

Haraldiophyllum hawaiiense sp. nov. is described as a new mesophotic alga and a new genus record for the Hawaiian Islands. Six specimens were collected at a depth range of 81-93 m from Papahānaumokuākea Marine National Monument, and their morphology investigated, as well as molecular phylogenetic analyses of the plastidial ribulose-1,5-bisphosphate carboxylase-oxygenase large-subunit (rbcL) gene and a concatenated alignment of rbcL and nuclear large-subunit rRNA gene (LSU) sequences. Phylogenetic analyses supported H. hawaiiense sp. nov. as a distinct lineage within the genus Haraldiophyllum, and sister to a large clade containing the type species, H. bonnemaisonii, as well as H. crispatum and an undescribed European specimen. The six Hawaiian specimens were shown to be identical, but unique among other species of the genus as well as the recently segregated genus Neoharaldiophyllum, which comprises half of the species previously included in Haraldiophyllum. The vegetative morphology of H. hawaiiense sp. nov. resembles Neoharaldiophyllum udoense (formerly H. udoensis); however, no female or post-fertilization structures were found in the Hawaiian specimens to allow a more comprehensive comparison. The molecular phylogenies demonstrate that Haraldiophyllum is paraphyletic, suggesting either that the Myriogrammeae tribe includes undescribed genera, including Haraldiophyllum sensu stricto, or that Neoharaldiophyllum species should be transferred into the genus Haraldiophyllum. However, based on vegetative morphology and molecular analyses, and pending resolution of this taxonomic issue, the Hawaiian specimens are placed within the genus Haraldiophyllum. This new record for the Hawaiian Islands highlights the novel biodiversity from mesophotic depths, reaffirming the need for further investigation into the biodiversity of Mesophotic Coral Ecosystems.