• 한국습지학회지
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• 제3권1호
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• pp.1-17
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• 2001

남강 연안대의 습지 개발이 생태계에 미치는 영향을 밝히고, 연안대 습지의 보호 대책을 강구하기 위한 기초 자료를 제공하고자 경남 진주시를 관통하는 남강 주변의 비교란된 습지와 교란된 습지에서 1999년 8월 7일부터 8월 15일까지 관속식물의 종조성, 분포, 식물군락의 구조, 저토의 물리 화학적 특성 등을 조사한 결과는 다음과 같다. 1. 조사지역에 분포하는 관속식물은 52과 142속 189종 26변종 2품종으로 총 217종류였다. 수생 관속식물을 생활형별로 분류하면 정수식물 23종류, 부엽식물 1종류, 부수식물 4종류, 침수식물 6종류 등으로 총 13과 34종류였고 다른 관속식물은 183종류였다. 2. 조사지역 전체에서 우점종은 중요치가 10.26인 고마리였고, 돼지풀, 환삼덩굴, 달뿌리풀 등의 순이었다. 비교란지의 우점종은 중요치가 l3.86인 고마리였고 달뿌리풀, 환삼덩굴, 나도미꾸리낚시 등의 순이었으며, 교란지의 우점종은 중요치가 15.81인 돼지풀이었고, 매듭풀, 쇠치기풀, 쑥 등의 순이었다. 3. 조사지역에서 출현한 귀화식물은 총 26종류였는데 귀화식물의 중요치는 비교란지보다 교란지에서 상대적으로 높았다 4. 종다양성 지수는 비교란지인 Site 1이 1.819로 가장 높았으며, 균등도 지수는 교란지인 Site 8이 0.902로 가장 높았다. 군집 유사도지수는 Site 1과 Site 2가 0.578로 다소 높았으며, Site 1과 Site 10은 0.341 로 가장 낮았다. 5. 저토 환경은 pH 5.17~7.35, 전기전도도 $24.67{\sim}74.33{\mu}mhocm^{-1}$, 유기물량 1.09~3.82%, 총질소량 0.06~0.15%, 총인량 $0.0008{\sim}0.0034mg100g^{-1}$ 등의 범위였다. 6. 식물체내 총질소 함량은 1. 52~2.65%이고, 총인량은 $0.010{\sim}0,039mg100g^{-1}$였는데, 질소 함량은 비교란지에서, 인 함량은 교란지에서 다소 높았다. 7. 야생동물의 서식지를 확보하고 수생 및 습생 관속식물의 다양성을 유지하기 위한 대책이 제시되었다.

• Molecules and Cells
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• 제41권11호
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• pp.964-970
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• 2018

Atherosclerosis preferentially involves in prone area of low and disturbed blood flow while steady and high levels of laminar blood flow are relatively protected from atherosclerosis. Disturbed flow induces endoplasmic reticulum (ER) stress and the unfolded protein response (UPR). ER stress is caused under stress that disturbs the processing and folding of proteins resulting in the accumulation of misfolded proteins in the ER and activation of the UPR. Prolonged or severe UPR leads to activate apoptotic signaling. Recent studies have indicated that disturbed flow significantly up-regulated $p-ATF6{\alpha}$, $p-IRE1{\alpha}$, and its target spliced XBP-1. However, the role of laminar flow in ER stress-mediated endothelial apoptosis has not been reported yet. The present study thus investigated the role of laminar flow in ER stress-dependent endothelial cell death. The results demonstrated that laminar flow protects ER stress-induced cleavage forms of PARP-1 and caspase-3. Also, laminar flow inhibits ER stress-induced $p-eIF2{\alpha}$, ATF4, CHOP, spliced XBP-1, ATF6 and JNK pathway; these effects are abrogated by pharmacological inhibition of PI3K with wortmannin. Finally, nitric oxide affects thapsigargin-induced cell death in response to laminar flow but not UPR. Taken together, these findings indicate that laminar flow inhibits UPR and ER stress-induced endothelial cell death via PI3K/Akt pathway.

• 한국동물학회:학술대회논문집
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• 한국동물학회 1996년도 한국생물과학협회 국제학술대회
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• pp.106.2-106
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• 1996

No Abstract, See Full Text

• 한국환경복원기술학회지
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• 제22권6호
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• pp.89-96
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• 2019

This study was carried out for management of the invasive alien plants in Mt. Inwang located in central Seoul. The invasive alien plants are 11 families, 34 genera, 30 taxa, and they are 10.8% of the total vascular plants(314 taxa). The ecosystem disturbed plants designated by the Korea environment ministry are 6 taxa : Rumex acetosella, Lactuca scariola, Ambrosia trifida var. trifida, Ambrosia artemisiifolia, Aster pilosus and Eupatorium rugosum. In the life-form, herbaceous perennials are 13 taxa(35.3%). In the continent of origin, the species from America are 20 taxa(58.8%). In the introduction time, the species of third period are 14 taxa(41.2%). In the diffusion grade, 5 grade species are 14 taxa(41.2%) and they are wide spread species. Mt. Inwang was designated as ecological scenery conservation area of Seoul in 2007. But Mt. Inwang is in high danger by the spread of invasive alien plants and ecosystem disturbed plants, due to artificial factors such as development pressure and the occurrence of byway trail. Therefore, Mt. Inwang needs systematic management of invasive alien plants and monitoring of long-term changes.

• 한국농공학회지
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• 제35권3호
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• pp.74-80
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• 1993

Runoff simulation tests to investigate the flow mechanics of nonsuomerged overland flow in a natural grass intervening land system were condueted and a modified kinematic wave overland runoff model developed by Choi et al. (1993) was verified. Nonhomogeneity and heterogeneity of the soil, slope, local topography, infiltration, grass density, and the density and activity of the soil microhes and wild animals were the major factors affecting the flow. Streamlines were disturbed by grass stems and small concentrated flows due to the disturbed streamlines and local topography were observed a lot. Relatively larger concentrated flows were observed where bundles of grass were dominant than where individual grasses were growing. Predicted hydrographs were agreed verv well with measured hydrographs. Since the modified model considers grass density in computing flow depth and hydraulic radius, it can be better than existing kinematic wave model if it were used to route nonpoint source pollutant attenuation processes in many grass intervening land systems.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2003년도 봄 학술발표회 논문집
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• pp.503-508
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• 2003

In this study, we peformed ahead a field geological investigation, boring investigation for slope stability analysis in large scale slope failure area. But the geological stratum was not clearly grasped, because ground was very disturbed by large scale Granite intrusion. Furthermore, the existing test data was not pertinent to the large scale Granite intrusion site like here. Therefore, various kind of field test were performed to grasp clearly for geological stratum. And the results of back analysis, various kind tests used to slope stability analysis.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2003년도 봄 학술발표회 논문집
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• pp.773-780
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• 2003

The characteristics of soft clays is very important for the land development plan. This study is to investigate correlations between the engineering properties and the characteristics of clay minerals of the disturbed clay samples obtained from Sihwa area. This study included X-Ray Diffraction Analysis, X-Ray Fluorescence Spectrometer Analysis, Scanning Electron Microscopy Analysis and Energy Dispersive X-Ray Spectrometer Analysis. The correlations between the clay mineral properties and the laboratory and field testing results were investigated.

• 한국자원식물학회지
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• 제34권1호
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• pp.103-113
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• 2021

본 연구는 무등산국립공원 담양권역의 전체 식물상 및 특기 할만한 식물의 분포를 파악하고 생태계교란 야생식물의 유입요인 및 관리방안을 모색해보기 위해 수행되었다. 조사는 2019년 5월부터 2020년 10월까지 총 8차례에 걸쳐 실시되었다. 무등산국립공원 담양권역의 식물상은 107과 349속 531종 57변종 5아종 10품종 총 603 분류군이 분포하는 것으로 확인하였다. 이는 우리나라 관속식물 총 4,881 분류군의 약 12.33%로 나타났다. 무등산국립공원 담양권역에서 출현한 희귀식물은 총 15 분류군이 관찰되었다. 멸종위기종(CR)은 목련, 위기종(EN)은 댕강나무 등이 출현하였다. 취약종(VU)은 개박하, 나도옥잠화, 땅나리 그리고 주목이 관찰되었다. 무등산국립공원 담양권역의 식물구계학적 특정식물은 50과 73속 81종 3변종 1아종으로 총 85 분류군이 출현하였다. V등급은 승마 등 3분류군, IV등급은 선주름잎, 고로쇠나무, 털조장나무 등 5분류군, III등급은 청시닥나무, 산황나무 등이 관찰되었고, 특산식물은 노각나무, 닥나무, 각시서덜취, 백운산원추리, 병꽃나무, 검팽나무, 진범 등 총 13 분류군으로 파악되었다. 무등산국립공원 담양권역에서 출현한 귀화식물은 미국자리공, 방가지똥 등 16과 36속 45종 총 45 분류군으로 관찰되었고, 귀화율은 7.46%로 나타났으며, 도시화지수는 14.01%로 계산되었다. 생태계교란 야생식물은 돼지풀, 애기수영, 도깨비가지, 및 양미역취 총 4 분류군이 관찰되었다. 신선대억새평전에 생육하는 생태계교란 야생식물인 애기수영에 대한 장기적인 모니터링이 요구되고, 특히 물리적이고 생물학적인 방제가 지속되어야 할 것이다.

• Journal of Ecology and Environment
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• 제31권1호
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• pp.37-43
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• 2008

We analyzed soil characteristics, soil seed banks, and plant communities in a small islet in Ganwol Lake from May 2005 to August 2006 to examine the forces driving plant settlement on sand bars and the effects of plant settlement patterns on nesting sites of little terns (Sterna albifrons). The soil nutrients contents in a site where the feces of wintering birds accumulate (N: 15.4 mg/kg, P: 10.5 mg/kg, LOI: 0.51 %, pH: 6.8) and a site where organic sediments accumulate (N: 20.7 mg/kg, P: 16.4 mg/kg, LOI: 0.40%, pH: 6.6) were much higher those of a control site which was not affected by bird feces and organic sediments (N: 4.1 mg/kg, P: 5.4 mg/kg, LOI: 0.41%, pH: 6.7). However, a seed bank was formed only on the site with accumulated organic sediments. Plant settlement was accelerated by feces from wintering birds and organic sediment accumulation on sand bars in Ganwol Lake. The percentage of area disturbed by human activities increased from 0.2% in May 2005 to 13.9% in August 2006, and the percentage of annual communities increased from 27.5% to 43.3%, but the percentage of open area decreased from 55.2% to 28.0% from May 2005 to August 2006. These increases in disturbed area and annual communities decreased the open area for breeding of little terns. The enlargement of P. communis and T. angustata communities was suppressed by irregular flooding. These results provide useful information for the management of little tern breeding sites for conservation purposes.

• The Korean Journal of Ecology
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• 제15권1호
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• pp.59-65
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• 1992

Pollen analysis to clear vegetational history of korea was carried out on the deposite taken from the pit of the miruksa site, south-western korea(36o00'18'N, 127o1'12'E, 10m in alt.). This area has been known as the cool temperate zone(southern zone) according to yim and kira(1975). But, now we can not found the original vegetation because the area has been disturbed severely and almost area changed to cultivated land.the area is one of the most developd area in early agricultural stage of korea. By the pollen diagram, three local pollen zones are distinguished in this site, bottom to surface, as following. is-Ⅰ :pinus-quercus zone (140∼120 cm, sample 1 and 2) is-Ⅱ :ulmus+zelkova zone(120∼84 cm, sample 3∼6) is-Ⅲ :pinus zone(84∼0 cm, sample 7 ∼13) is-Ⅰ is characterized by high values in frequences of pinus, the temperate conifer and quercus the cool temperate oak, and is-Ⅱ zone by the decrease of quercus and increase of ulmus and increase of ulman+zelkova as ravine forest elements, isⅢ zone is characterized by pinus, especially, based on data of sample no.9.