Phytoplankton community of Motjae-neup at Hapchŭn gun, Korea

합천 못재늪의 식물성 플랑크톤군집

The community of phytoplankton, dominant species and environmental factor were investigated in Motjae-neup from January to September, 1996. A total 45 taxa were identified during the investigation period and composed of 5 classes, 8 orders, 13 families, 24 genera, 37 species, 6 varieties, 2 formation. The most important group was Chlorophyceae with 19(42.2%) taxa, followed by the Bacillariophyceae with 13(28.9%) taxa, Euglenophyceae with 7(15.6%) taxa, Cyanophyceae with 5(11.1%) taxa and Dinophyceae with 1(2.2%) taxon. Frustulia rhomboides, Eunotia lunaris, and Stauroneis anceps were important dominant species at Motjae-neup. The common species of all season are Microsystis aeruginosa, Melosira. varians, Frustulia rhomboides, Pinnularia braunii var. amphicephala, Stauroneis anceps. Ranges of environmental factors were measured : temperature, $3^{\circ}C{\sim}38^{\circ}C$; water temperature, $3.3^{\circ}C{\sim}26.5^{\circ}C$; pH, 5.7~6.38; BOD, $4.3{\sim}19.6mg/{\ell}$; chlorophyll a, $6.9mg/m^3{\sim}25.9mg/m^3$; SS, $26mg/{\ell}{\sim}52mg/{\ell}$; COD, $24{\sim}46mg/{\ell}$; total-N, $0.9538mg/{\ell}{\sim}2.3036mg/{\ell}$; total-P, $0.1057mg/{\ell}{\sim}0.1909mg/{\ell}$; electron conductivity, $25.5{\mu}s/m^3{\sim}2.3036{\mu}s/m^3$.

1996년 1월에서 9월까지 못재늪을 대상으로 식물성 플랑크톤상과 우점종 및 환경요인을 조사하였다. 5강 8목 13과 24속 37종 6변종 2품종으로 전체 45분류군이 동정되었다. 녹조강이 19(42.2%)분류군으로 가장 많은 분류군이 출현하였으며, 규조류강이 12(28.9%)분류군, 유글레나강이 7(15.6%)분류군, 남조강 5(11.1%) 분류군, 와편모조강이 1(2.2%)분류군으로 각각 출현하였다. 못재늪에서 Frustulia rhomboides, Eunotia lunaris, and Stauroneis anceps 주요 우점종으로 나타났다. Misrosystis aeruginosa, Melosina varians, Frustulia rhomboides, Pinnularia braunii var. amphicephala, Stauroneis anceps 등은 전 계절에 걸쳐 계속적으로 출현하였다. 환경요인은 기온은 $3^{\circ}C{\sim}38^{\circ}C$도의 범위이고 수온은 $3.4^{\circ}C{\sim}26.5^{\circ}C$이고 pH는 5.7~6.38이며, BOD는 $4.3{\sim}19.6mg/{\ell}$이다. 그리고 chlorophyll a의 양은 $6.9mg/m^3{\sim}25.9mg/m^3$이고 SS는 $26mg/{\ell}{\sim}52mg/{\ell}$, COD는 $24{\sim}46mg/{\ell}$의 범위이고 total-N은 $0.9538mg/{\ell}{\sim}2.3036mg/{\ell}$, total-P는 $0.1057mg/{\ell}{\sim}0.1909mg/{\ell}$이고 전기전도도의 범위는 $25.5{\mu}s/m^3{\sim}2.3036{\mu}s/m^3$이다.