• 한국습지학회지
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• 제1권1호
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• pp.61-69
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• 1999

경상남도 합천군 박실늪에서 선버들 자연림의 지상부 현존량과 연순생산력을 상대생장법으로 조사하였다. 선버들의 ha당 개체 밀도는 6,140본이고, 분지된 줄기는 14,950개로서 한 개체당 분지된 줄기는 평균 2.43개였다. 지상부 각 부위별 현존량의 비율은 줄기 59.2%, 가지 28.3%, 잎 12.5%였다. 각 부위의 건중량과 $D^2H$에서 상대생장식을 유도하여 추정한 선버들의 ha당 현존량은 109.7ton이었고 조사지역 전체에서 지상부 총현존량은 926.7ton이었다. 현존량과 연령구조로부터 추정한 선버들의 ha당 연순생산량은 25.3ton이었다.

• 아시안잔디학회지
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• 제9권2호
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• pp.101-107
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• 1995

A Zoysia japonica and Miscanthus sinensis grasslands of north-west side on Mt. Kwanak were investigated The most important species in this area were Zoysia japonica and Miscanthus sinensis These two species contributed greatly to the standing crops of live material, which were in excess of 598. 4g /$m^2$ and 698. 7g /$m^2$ during the growing season, respectively. This value would he ucreased if the production of the moss and algal mats which cover the soil surface during the growing season was included. The productive structures of the Zoysia japonica and Mliscanthus si nen sis grasslands were short and long height types of the grasslands, respectively. Key words: Standing crop, Production structure.

• 수산해양기술연구
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• 제41권2호
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• pp.129-139
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• 2005

We investigated the characteristics of the thermohaline structure and phytoplankton community from the southwestern areas of Jeju to the nothern areas of Taiwan in the Ease China Sea, in June 2004. According to the analysis of a T-S diagram, three characteristic of water masses were identified. We classified them into the mixed water mass by the Chiness continental coastal waters and Yellow Sea cold water (Region A), Chinese continental coastal waters (Region B) and Taiwan warm current (Region C). Region A was characterized by low temperature, low salinity, high density and high Chl-a concentration. Region B was characterized by high temperature, low salinity, low density and high Chl-a and Region C was characterized high temperature, high salinity, low density and low Chl-a concentration. The phytoplankton community identified a total of 56 species belonging to 31 genera. The dominant species was mainly dinoflagellates, Gymnodinium breve, Scrippsiella trochoidea, Ceratium fusus, Prororcentrum triestinum, centric diatoms, Chaetoceros lorenzianus, Leptocylindrus danicus, Proboscia alata, Skeletonema costatum and pennate diatoms, Pseudonitzschia pungens, Cylidrotheca closterium. Standing crops of phytoplakton fluctuated between $0.1{\times}10^2$ cells/L and $5.7{\times}10^4$ cells/L by dominance of dinoflagellates. In the phytoplankton community, the Region A was characterized by the various species composition in 39 species, the dominint species with di-atomes, Pn. pungen, Ch. lorenzianus and standing crops from 6.9 cells/$m\ell$ to 56.6 cells/$m\ell$, Region B by the various species composition in 37 species, the dominant species with dinoflagellates, G.breve, S. trochoidea and standing crops from 4.6 cells/$m\ell$ to 26.7 cells/$m\ell$, and the Region C by low species number with 28 species, the dominant species with one dinoflagellate, S.trochoidea and one diatom, L.danicus and very low standing crops from 0.1 cells/$m\ell$ to 5.7 cells/$m\ell$. Phytoplankton productivity in the East China Sea was controlled by Chinese continental coastal waters which include a high concentrations of nutrients.

• 환경생물
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• 제29권2호
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• pp.107-112
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• 2011

2010년 영산강 섬진강 수계의 29개 호소 45개 지점의 환경조사에서 동정된 식물플랑크톤은 총 371종으로 규조강과 녹조강이 주를 이루었다. 호소의 규모와 식물플랑크톤의 분포 양상 사이에 상관성이 거의 없는 것으로 나타났다. 호소의 유역면적과 식물플랑크톤 현존량은 상관성을 보이지 않았고, 유역면적과 출현종수 사이에도 상관성이 매우 낮았다. 수표면적과 식물플랑크톤 출현종수와 현존량 사이에는 낮은 상관성이 나타났다. 본 조사 호소들에서 호소의 규모와 식물플랑크톤 군집 사이에 상관성이 높지 않은 것은 호소의 규모가 작고 수량의 연중 변동이 크며 먹이망과 인위적인 간섭이 식물플랑크톤의 자연적인 분포를 왜곡하였기 때문으로 생각된다. 호소의 축조연대와 식물플랑크톤의 분포 사이에도 상관성이 없는 것으로 나타났다. 식물플랑크톤의 출현 현존량은 호소의 형성연대와 상관관계가 없는 분포를 보여주었다. 축조연대와 클로로필 a의 농도 사이에는 더 낮은 상관성을 보여주었다. 본 조사가 이루어진 호소들에서는 생성연대의 차이에 따른 부영양화 정도에 차이가 있지만 다른 요소들(체류시간, 수심, 생물상)에 의한 효과로 호소 생성연대의 영향을 찾을 수 없었다.

• 생태와환경
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• 제33권1호통권89호
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• pp.38-50
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• 2000

전라남도 광양시 진상면 일대의 수어댐 담수수역을 중심으로 하는 수어천 수역을 대상으로 이화학적 환경요인, 식물플랑크톤의 종조성과 현존량 및 부착조류에 대한 조사를 1998년 8월부터 1999년 4월까지 총 5개정점에서 실시하였다. 이화학적 환경요인 중 pH는 중성에 가까운 약산성을 나타내었고, 출현한 식물플랑크톤은 112종류였으며 조사 정점 중 하류수역인 정점 4 및 정점 5에서는 녹조류, 남조류 및 와편모조류의 출현빈도가 높아 정점간의 차이를 나타내었다. 출현한 돌말류는 대부분이 소형 깃돌말류였다. 계절별로는 동계에 가장 적게 출현하였고 하계 및 추계에 많이 출현하였으며 정점별로는 하류 정점으로 갈수록 출현종류 수가 증가하였다. 식물플랑크톤 현존량은 1999년 4월 정점 4의 10,100 cells/1이 최저였으며 1998년 10월 정점 4의 1,489,100 cells/1이 최대였다. 정점별 현존량 변이 역시 정점 1, 정점 2, 정점 3에서와 하류수역인 정점 4 및 정점 5에서는 다른 양상을 나타내었다. Achnanthes minutissima, Rhizosolenia longiseta, Synedra rumpens, filamentous algae 등이 조사 기간 중 최고의 점유율을 나타내었으며 이외에 Aulacoseira distans v. alpigena, Cocconeis placentula v. lineata, Cymbella minuta, C. silesiaca, Fragilaria arcus v. recta, Peridinium cinctum등이 주요 우점종으로 출현하였다. 부착조류는 99종류가 출현하였는데, 돌말류의 출현빈도가 매우 높았으며 출현종류는 식물플랑크톤 군집과 약간의 차이를 나타내었다. 출현종류 수는 동계에 가장 많이 출현하여 식물플랑크톤의 계절별 출현상황과는 차이를 나타내었다. 출현한 식물플랑크톤 및 부착조류 중 각각의 돌말류를 대상으로 Ecological indicator values를 적용시켜본 결과, 본 조사 수역의 수질 오염정도는 ${\beta}$-중부수성을 나타내었으며, 영양상태는 부영양 단계의 근접한 상태를 나타내었다. 부유돌말류 및 부착돌말류의 출현에 따른 Ecological indicator values에는 차이가 없었다.

• 아시안잔디학회지
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• 제9권3호
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• pp.225-234
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• 1995

The Widespread and most abundant grasses are Miscanthus sinensis and Pteridium aquilinum in the grassland of Cheju-Island. The vascular flora of the grassland are composed of 127 species in all. Those communities of Miscanthus sinensis Pteridium aquilinum Imperata cylindrica Themeda japon-ica and Zoysia japonica are relatively homogeneous. Standing crops of the mixed grass communities range from 657 g /$m^2$ to 2, 975 g /$m^2$ on August 30, and the value of daily net production is around 2.6~121 g/$m^2$. The standing crop of north facing slop showed higher than that of south facing slop. Relationship between the standing crop and water content, organic matter, total nitrogen and available phosphorus of soils in Cheju-Island showed high level of significant.

• 한국환경생물학회:학술대회논문집
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• 한국환경생물학회 2004년도 학술대회
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• pp.67-67
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• 2004

• 환경생물
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• 제30권3호
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• pp.173-184
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• 2012

In order to investigate the fluctuation rates [FR] of phytoplankton after passage through a cooling system, the standing crops, chlorophyll a concentrations and carbon assimilation number of phytoplankton were surveyed at intake and outlet at Wolsong nuclear power plant [NPP] from July 2006 to June 2008. As a result, the total mean standing crops of phytoplankton were $1.0{\times}10^6\;cells\;L^{-1}$ and $7.3{\times}10^5\;cells\;L^{-1}$ at intake and outlet, respectively. The FR of phytoplankton by passage through the cooling system [PTCS] was 27.0%. Among them, the FR of microplankton and nanoplankton were 34.1% and 12.4%, respectively. In addition, the FR of diatoms and dinoflagellateswere 33.9% and 29.7%, respectively. These results showed the entrainment effects on microplankton and diatoms by PTCS were higher than those of nanoplankton and dinoflagellates. The FR of total chlorophyll a concentrations were 54.4%, and the FR of microplankton, nanoplankton and picoplankton were 58.9%, 38.5%, and 52.4%, respectively. So the entrainment effects on microplankton by PTCS were higher than those of nanoplankton and picoplankton. The mean FR of carbon assimilation number of phytoplankton was 57.6%, and the seasonal variations of FR of carbon assimilation number ranged from 47.5% to 76.8%. Our results indicated that the phytoplankton species responded differently to power plant operating conditions such as elevated temperature, chlorination, and mechanical impacts.

• ALGAE
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• 제19권1호
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• pp.15-22
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• 2004

This study investigated the temporal and spatial dynamics of an epilithic algal community in the Hantan River in November 2001, February, May and August 2002. It was identified a total of an epiphlithic 301 taxa which were composed of 275 species, 16 varieties and 10 unidentified species. The standing crops ranged between 598,600-16,525,200 cells $\cdot$ $cm^2$ and showed the temporal and spatial variations, A higher value was found at the lower station than the upper station in winter, but a higher value was found at the upper station than the lower station in summer due to the effects of typhoons. Chlorophyll concentrations ranged between 13.4-304.2 ${\mu}g$ $\cdot$ $cm^2$. Standing crops and chlorophyll showed similar trends in autumn and winter, but temporal dynamics were not apparent in the overgrowth of Lyngbya, Schizothrix and so others in Cyanophyceae in spring and summer. They were composed of species in Chlorophyceae-Bascillariophyceae-Cyanophyceae and no seasonal effect was detected. Low diversity index values probably indicated the effects of environmental stresses (water temperature, flow and current velocity) other than organic pollution. An assessment of organic pollution using epilithic diatoms (DAIpo) showed $\alpha$-oligosaprobic states at the upper- and mid- stations, and $\alpha$-mesosaprobic states at the lower- stations.

• 환경생물
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• 제21권4호
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• pp.415-421
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• 2003

Chlorophyll-a and its degradation products (pheopigment) contained in the sediment were determined to evaluate the eutrophication status in the downstream of Nakdong River. The chlorophyll-a and pheopigment concentrations of sediment ranged 11-646 mg $\mu \textrm m^{-2}$ (mean 172 mg $\mu \textrm m^{-2}$) and 48-1,564 mg $\mu \textrm m^{-2}$ (mean 454 mg $\mu \textrm m^{-2}$) over 11 sampling stations of the Nakdong River. The chloropigment concentrations in this local area were higher than other values reported previously and this river waters showed hypertrophic status in view of sedimentary chloropigment. Total chloropigment standing crops of sediment, which are the residuals after the longterm degradation, were 2.2-3.6 fold higher than chlorophyll-$\alpha$ contents of overlying water. The amounts of chloropigments of sediment suggest a large contribution of phytoplankton to the sediment. While chloropigment standing crops are evaluated with organic-C and nitrogen contents, the algal contribution to the carbon and nitrogen pool of the sediment were estimated to be approximately 30% and 40%, respectively.