• ALGAE
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• 제23권3호
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• pp.201-207
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• 2008

Based on samplings during 2006-2007 on the intertidal zone of Playa Tampico, Eréndira and Punta Baja, Baja California, Ulva pertusa Kjellman (Ulvales, Chlorophyta) was recorded for the first time for the Pacific coast of Mexico. An alga native to Asia, U. pertusa has just recently been recorded in the southern coast of California (USA). The identification of U. pertusa was based on the observation of the morphology and reproductive characters of the collected specimens. Furthermore, the species identity was confirmed by molecular comparison between nuclearencoded ITS2 sequences of the Mexican samples and those of other Ulva species in GenBnak data. Habitat and distribution of U. pertusa along the Pacific coast of North America are also described. Considering our new report of its occurrence in Mexico, we conclude that U. pertusa is expanding its geographical distribution by trans-ocean introductions.

• 한국환경생태학회지
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• 제29권3호
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• pp.401-409
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• 2015

소양호에 서식하는 어류와 도입어종의 서식 실태를 파악하기 위해 8개 지점에서 2013년 3월부터 10월까지 조사를 실시하였다. 채집된 어류는 총 12과 41종이었다. 천연기념물에 속하는 어종은 어름치와 황쏘가리 2종 이었다. 한반도 고유종은 줄납자루을 포함하여 15종으로 고유화빈도가 36.6%를 나타내었다. 2003년 이후 본 조사에서 새로 출현한 어종은 줄납자루, 참붕어, 중고기, 참중고기, 대륙종개, 대농갱이, 무지개송어, 배스 등 이었다. 우점종은 빙어(St. 1, 3, 6, 7, 8), 블루길(St. 2, 4), 피라미(St. 5) 등 이었다. 도입된 어종은 총 12종으로 국내 타수역에서 도입 방류한 어종은 뱀장어, 치리, 대농갱이, 빙어, 갈문망둑, 민물검정망둑 등 6종 이었고 국외에서 도입된 어종은 이스라엘잉어, 떡붕어, 무지개송어, 찬넬동자개, 블루길, 배스 등 6종 이었다.

• 자원환경지질
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• 제20권2호
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• pp.97-106
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• 1987

The geology of the Bupyeong mine area is consisted of Precambrian Gyeonggi gneiss complex and Mesozoic igneous rocks; i.e., pyroclastic rocks, intrusive breccia, granite and felsic porphyries which were formed during a Jurassic to early Cretaceous resurgent caldera evolution. Granites are not observed on the surface and in the underground of the mine. Bupyeong silver deposits occur as stockworks of base metal sulfides- minor silver minerals-quartz - carbonate veinlets, hosted by pyroclastic rocks and intrusive breccia at the southwestern margin of the caldera. Silver occurs mainly as native silver, and other silver minerals, minor in quantity, are argentite, tetrahedrite-freibergite, pyrargyrite, polybasite, canfieldite and dyscrasite. The average grade of silver ore is about 180g/t Ag. Discrimination of silver ore from the country rocks depends largely on the chemical analyses of rock samples taken every two meters from tunnels, diamond-drilling cores and mining stopes, because silver minerals are hardly observed in the ore by crude eye, and silver orebodies do not properly coincide with the concentrated zone of base metal sulfides which were precipitated at the earlier stage than the stage of precipitation of native silver. General characteristics of the loci of the silver orebodies are as follows; (1) The host rocks of orebodies are pyroclastic rocks and intrusive breccia. (2) Many of the orebodies are distributed around Gyeonggi gneiss complex. Especially where the paleotopography of gneiss complex shows a gradual slope, the basal stratigraphic horizon of the pyroclastic rocks unconformably overlying the gneiss complex offered a favorable loci of high grade ore. (3) $N5^{\circ}W$ to $N15^{\circ}$ E-striking faults played an important role in the localization of the orebodies. (4) Conduits of intrusive breccia within the gneiss complex, through which the intrusive breccia intruded into the upper pyroclastic rocks, exist beneath most of the main orebodies. This suggests that the conduits of intrusive breccia served as channelways for the migration of ore fluids.

• The Korean Journal of Ecology
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• 제24권6호
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• pp.385-394
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• 2001

An attempt to clarify the landscape structure of urban areas was carried out in the greenbelt around Seoul, Korea's metropolis. By means of aerial photographs and a field survey, a vegetation map including land-use pattern was made. Landscape structure was described by analyzing this vegetation map and the results of phytosociological survey. Landscape element types identified were (1) secondary forest, (2) plantation, (3) cultivated field, (4) urbanized area, (5) graveyard, and (6) bare rock. Vegetation units, resulting from the phytosociological analysis, included Quercus mongolica, Q. variabilis, Q. acutissima, Pinus densiflora, Q. aliena, and Alnus japonica communities. Plantations were composed of Robinia pseudoacacia, Populus tomentiglandulosa, P. rigida, Larix leptolepis, P. koraiensis, and Castanea crenata stands. Patches near to human settlements in the lower zones of the mountains were fragmented and small but they became larger towards the higher mountain zones. On the other hand, the number of patches was fewer and their size was larger in Mt. Cheonggye more distant from the principal residential area, larger in size, and higher in elevation compared with the other 2 mountains, Mt. Daemo and Mt. Acha. Floristic composition of Mongolian oak(Q. mongolica) stand distributing in the upper part of each mountain, in which artificial interference is rare, showed a difference among those study areas different in parent rock and disturbance regime. But that of black locust(R. pseudoacacia) stand located in lowland of mountainous area, in which artificial interference is frequent was similar to each other. As the results of analyses on the frequency distribution of diameter classes of major species, dominant landscape elements, Mongolian oak forest showed different responses depending on artificial interference as continuous maintenance and retrogressive succession in the sites far from and near to the residential areas, respectively. On the other hand, black locust stands showed a probability to be restore to the native oak forest through progressive succession.

• 한국토양비료학회지
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• 제26권2호
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• pp.85-92
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• 1993

벼 4 품종(品種)(금강(錦江)벼, 밀양(密陽) 23호(號), 추청벼, 칠성(七星)벼)을 무질소구(無窒素區), 질소적량구(窒素適量區), 다질소무가리구(多窒素無加里區) 등(等) 3 수준(水準)의 시비처리(施肥處理)로 수원(水原)(중서부(中西部) 평야지대(平野地帶)), 이천(利川)(중부(中部) 내륙지대(內陸地帶)) 및 계화도(界火島)(부안군(扶安郡), 차령남부(車領南部) 평야지대(平野地帶))에서 재배(栽培)하여 수확(收穫)한 벼를 조제(調劑)하여 얻은 정조(正租), 현미(玄米), 백미(白米)의 형태적(形態的) 특성(特性) 변화(變化)를 조사(調査)하였다. 질소시비증가(窒素施肥增加)는 정조(正租)의 입장(粒長) 증가(增加)와 백미(白米)의 폭(幅)/두께 비(比)를 감소(減少)시켰고 질소(窒素)의 과소(過少), 과다시용(過多施用)은 천립중(千粒重)을 감소(減少)시켰다. 계화도(界火島)에서 생산된 벼의 입폭(粒幅)과 입(粒)두께는 다른 지역(地域)에서 생산된 벼보다 적어서 장(長)/폭(幅) 비(比)나 장(長)/두께 비(比)가 컸다. 무질소(無窒素)와 다질소무가리(多窒素無加里) 처리(處理)는 천립중(千粒重)을 감소(減少)시켰다. 정조(正租)의 왕겨비율(比率)은 질소시비량(窒素施肥量) 증가(增加)에 따라서 감소(減少)한 반면(反面) 현미(玄米)의 쌀겨비율(比率)은 일정(一定)하였다. 이 결과(結果)는 쌀의 정상적(正常的)인 발육(發育)을 위해서 일정비율(一定比率)의 쌀겨층(層)이 필요(必要)함을 암시(暗示)하고 있다.

• Journal of Plant Biology
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• 제14권4호
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• pp.5-13
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• 1971

Pot and paddy field tests were conducted to study red discoloration of rice var. IR 667 leaves with reference to the leading Korean native variety Jinhung and Paldal, with the following results: 1. Minor elements such as Mn, Fe, B, Al, Ca and Si had no influence on the discoloration, but a supply of various soluble nitrogen compounds completely restricted it. The more prosperous the growth of IR 667 with nitrogen, the more severe the discoloration appears when nitrogen absorptin becomes limited. 2. Chlorotic pigments extracted from both IR 667 and Jinhung were compared spectrophotometrically, and found to have different spectral peaks. IR 667 had peak closer to red than Jinhung, indicating the characteristic of the variety. IR 667 was observed to be more sensitive to nitrogen deficiency than Jinhung or the other japonica variety. 3. It was concluded that all the factors limiting nitrogen supply for IR 667 growth, such as low nitrogen application, restriction of root respiration (low temperature, poor drainage, toxic gases or substances in the root zone, etc.) and pest injuries, would result in the appearance of the so-called red discoloration, because of the reduction in nitrogen uptake. Since, the discoloration of IR 667 is varietal characteristic when grown in Korea, control of it may be beneficial cultural practice in increasing grain yield, although the increased succeptibility to pests and a drop in the rate of maturity due to relatively high nitrogen level in the leaves may result in an unexpected drop in yield. It is anticipated that further exploration conducted from practical point of view will establish the relatioknships between the extent of red discoloration, nitrogen availability and grain yield in IR 667.

• 원예과학기술지
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• 제17권2호
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• pp.141-143
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• 1999

제주 자생 새우란, 금새우란, 왕새우란의 분류를 위한 동위효소 분석과 RAPD법을 이용한 유전적 근연관계 조사 결과, peroxidase와 esterase의 동위효소(isozyme)분석에서 왕새우란의 밴드양상은 새우란과 금새우란이 동시에 나타나는 밴드에서만 밴드가 나타났다. RAPD를 이용한 유전적인 근연관계에서 왕새우란은 새우란과 금새우란 모두와 비교적 가까웠지만 새우란과 금새우란의 상호간 근연관계는 가장 멀었다. 즉, 왕새우란은 유전적인 근연관계에서 새우란과 금새우란의 중간적인 위치를 나타내었다. 따라서, 왕새우란은 새우란과 금새우란의 자연적인 교잡으로 출현된 새로운 종으로 사료된다.

• Journal of Forest and Environmental Science
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• 제14권1호
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• pp.112-127
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• 1998

지난 5월 20일과 21일에 일본 삿포로시에서 평성(平成)10년도(年度) 사방학회연구발표회(砂防學會硏究發表會)가 개최되어 기획발표 21편과 일반발표 185편의 논문이 발표되었다. 기획발표로는 화산방재(火山防災) 일반(一般) 6편, 지진사방연구회(地震砂防硏究會) 활동보고(活動報告) 6편, 수변지역(水邊地域)의 관리(管理)와 지침(指針) 5편 및 평성(平成)9년도(年度) 토사재해(土砂災害) 4편이 각각 발표되었으며, 일반과제로는 사면안정(斜面安定) 10편, 사면붕괴(斜面崩壞) 10편, 지진(地震) 9편, 환경사방(環境砂防) 41편, 토사유출(土砂流出) 25편, 경계(警械) 피난(避難) 11편, 사방계획(砂防計劃) 10편, 사방사업(砂防事業) 11편, 사방구조물(砂防構造物) 10편, 화산사방(火山砂防) 12편, 녹화(綠化) 4편, 수문(水文) 4편, 눈사태 4편, 땅밀림 4편, 토석류(土石流) 18편 및 유학생(留學生) 2편 등이 발표되었다. 특히 기획발표중 "수변지역(水邊地域)의 관리(管理)와 지침(指針)"에서는 "수변지역(水邊地域)의 구조(構造)와 기능(機能)", "홍수(洪水)와 수변형성(水邊形成)의 상관관계(相關關係)", "토사관리(土砂管理)의 장(場)으로서의 계반지역(溪畔地域)과 유로정비(流路整備) 방법(方法)", "주민참가(住民參加)에 의한 자연림(自然林) 재생(再生) 노력(努力)", "수변완충지역(水邊緩衝地域) 설정(設定)의 제도적(制度的) 사회적(社會的) 과제(課題)" 등 5편이 발표되었다. 이는 우리 나라의 사방분야(砂防分野)에 있어서 앞으로의 산지급류소하천(山地急流小河川)을 친환경적(親環境的)인 방법으로 정비하는 데에 중요한 자료이므로 그 내용을 요약 정리하였다.

• Journal of Species Research
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• 제6권1호
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• pp.59-67
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• 2017

Southwest Primorye is located in the southern most part of the Russian Far East. The flora of this area is one of the most thoroughly studied and contains 1,530 species of vascular plants, belonging to 622 genera and 154 families, representing 55.6% of the flora of the Primorsky Territory. The flora native to Southwest Primorye encompasses 1,356 species from 547 genera and 148 families. Adventitious plants are represented by 174 species from 127 genera and 37 families. Among other areas of the Russian Far East, only Southwest Primorye has flora in common with the Korean Peninsula, which contains plant species in the subtropical and tropical latitudes: Mitrasacme indica Wight, Halosciastrum melanotilingia [Boissieu] M. Pimen. et V. Tichomirov, Streptolirion volubile Edgew., Lipocarpha microcephala [R. Br.] Kunth, Pueraria lobata [Willd.] Ohwi, Belamcanda chinensis [L.] DC., Zoysia japonica Steud., Deinostema violacea [Maxim.] Yamazaki and Parthenocissus tricuspidata [Siebold et Zucc.] Planch. Most of the flora is represented by the species restricted to Southwest Primorye (seven endemic species) or the Korean Peninsula (seven hemiendemic species). A total of 50.2% of the 10 largest families are nemoral (preboreal) floras, located in the transitional zone of the boreal and nemoral floras. In terms of the structure of the ranked taxonomic spectrum of the largest families, the flora of Southwest Primorye is more similar to that of Northeast China with influence of the Korean flora.

• 한국환경생태학회지
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• 제29권5호
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• pp.718-728
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• 2015

강릉남대천의 어류군집 변화와 도입된 어종의 서식실태를 파악하기 위해 9개 지점에서 2013년 9월에서 2014년 5월에 걸쳐 실시하였다. 채집된 어류는 총 14과 36종 이었고, 멸종위기종에 속하는 가시고기(Pungitius sinensis) 1종이 출현하였다. 한반도 고유종은 쉬리(Coreoleuciscus splendidus)을 포함하여 9종으로 고유화빈도가 25.0% 이었다. 우점종은 버들개(Rhynchocypris steindachneri, St. 1), 참갈겨니(Zacco koreanus, St. 2, 4, 5, 6), 새미(Ladislabia taczanowskii, St. 3), 피라미(Zacco platypus, St. 7, 8), 황어(Tribolodon hakonensis, St. 9) 이었다. 한강수계에서 강릉남대천으로 도입된 어종은 새미, 돌고기(Pungtungia herzi), 쉬리(Coreoleuciscus splendidus), 긴몰개(Squalidus gracilis majimae), 모래무지(Pseudogobio esocinus), 금강모치(Rhynchocypris kumgangensis), 피라미, 참갈겨니, 새코미꾸리(Koreocobitis rotundicaudata), 퉁가리(Liobagrus andersoni), 꺽지(Coreoperca herzi) 11종이었다. 개체군과 분포역이 급격히 확대되는 도입어종은 피라미, 참갈겨니, 돌고기, 긴몰개 등이었으며 정착되어 안정적인 개체군을 형성하였으며 서식지가 급격히 확대되지 않은 어종은 새미, 쉬리, 버들개 등 이었다. 정착하였으나 개체군이 매우 적은 어종은 꺽지와 퉁가리이었다. 1973년에 비해 개체수 구성비가 3%이상 감소된 어종은 버들개, 종개(Orthrias toni), 북방종개(Iksookimia pacifica), 은어(Plecoglossus altivelis), 가시고기, 꾹저구(Gymnogobius urotaenia) 등 이었고 버들개는 56.1%에서 12.9%로 가장 많이 감소하였다.