Korean Journal of Environmental Biology Vol. 38 No. 2 (p.299-307)

|Original article|
2012년 한강 서울통과 구간의 식물플랑크톤 군집 특성

Phytoplankton community in the Seoul passage section of the Han River in 2012
키워드 :
Han River,phytoplankton,monitoring,diatom,Aulacoseira


서 론
재료 및 방법
   1. 조사지점 및 조사기간
   2. 환경요인 분석
   3. 식물플랑크톤 분석
결과 및 고찰
   1. 물리 . 화학적 환경요인의 변화
   2. 식물플랑크톤 현존량 및 엽록소-a의 변화
   3. 식물플랑크톤의 종조성 및 변화
   4. 식물플랑크톤의 군집변화
   5. 우점종 변화
   6. 한강 모니터링의 의의
적 요


This study reported on the phytoplankton community and seasonal changes in the Seoul passage section and downstream in the Han River in 2012. Field samples were collected monthly from the upper (Paldang), middle (Cheongdam), and downstream (Seongsan) areas of the Seoul passage section. Water temperature, DO, pH, and conductivity were measured at each station. All environmental factors measured were recorded similarly at the three stations. The water temperature ranged from 2 to 30°C and the dissolved oxygen ranged from 4.8 to 9.1 mg L-1, showing typical patterns of temperate regions. The phytoplankton cell concentrations ranged from 990 cells mL-1 (Paldang, December) to 2.9×104 cells mL-1 (Seongsan, March), and the chlorophyll-a content showed similar patterns to the cell numbers. The phytoplankton community was comprised of 75 genera and 95 species, including 37 diatoms, 29 Chlorophyta, 11 cyanobacteria, and two dinoflagellates. The number of species that appeared seasonally varied greatly, from nine species (Paldang, May) to 35 species (Cheongdam, December). Diatoms were the most dominant in all stations and seasons, except in summer. In contrast, chlorophytes and cyanobacteria showed sporadic high numbers in the summer and fall seasons. Four diatoms Stephanodiscus hantzschii f. tenuis, S. hantzschii, Fragilaria sp., and Aulacoseira spp., a chlorophyte Actinastrum hantzschii, and a cyanobacterium Microcystis sp. were each present in proportions greater than 10%. This study provides fundamental data from phytoplankton communities and environmental factors in the Han River for understanding water quality for long-term environmental monitoring.