Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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The Seasonal and Regional Distribution of Phytoplankton Communities in the Fisheries Resources Protection Area of Korea in 2016

2016년 한국 수산자원보호해역에서 식물플랑크톤 군집의 계절 및 해역별 분포

  • Yoo, Man Ho (Oceanic Climate and Ecology Research Division, National Institute of Fisheries Science) ;
  • Park, Kyung Woo (Oceanic Climate and Ecology Research Division, National Institute of Fisheries Science) ;
  • Oh, Hyun Ju (Oceanic Climate and Ecology Research Division, National Institute of Fisheries Science) ;
  • Koo, Jun Ho (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Kwon, Jung No (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Youn, Seok Hyun (Oceanic Climate and Ecology Research Division, National Institute of Fisheries Science)
  • 유만호 (국립수산과학원 기후변화연구과) ;
  • 박경우 (국립수산과학원 기후변화연구과) ;
  • 오현주 (국립수산과학원 기후변화연구과) ;
  • 구준호 (국립수산과학원 어장환경과) ;
  • 권정노 (국립수산과학원 어장환경과) ;
  • 윤석현 (국립수산과학원 기후변화연구과)
  • Received : 2018.01.25
  • Accepted : 2018.04.27
  • Published : 2018.04.30
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Abstract

This study was conducted to understand the characteristics of the seasonal and regional distribution of phytoplankton communities in the Fisheries Resources Protection Area of Korea (FRPA). We investigated the phytoplankton composition, abundance and dominant species collected from five different regions (Cheonsu, Tongyeong-I, Tongyeong-II, Hansan, and Jindong) in 2016. According to the results, most environmental parameters, such as temperature, salinity and nutrients, showed statistically significant seasonal differences. Suspended particulate material (SPM) only showed a statistically significant regional difference. The mean abundance of phytoplankton ranged from 13 to $4,062cells{\cdot}ml^{-1}$, with large spatio-temporal fluctuations. In particular, the bloom of phytoplankton (>$10^3cells{\cdot}ml^{-1}$) in Cheonsu Bay occurred in April and October with Skeletonema spp. and Chaetoceros socialis being the dominant species during these two seasons, respectively. The dominant species in the FRPA were diatoms (Pseudo-nitzschia spp., Skeletonema spp., and Chaetoceros pseudocriniuts) and dinoflagellates (Scrippsiella trochoidea and Tripos furca). The seasonal distribution of phytoplankton communities showed typical characteristics of coastal waters, i.e., that diatoms usually dominated in winter and autumn, while dinoflagellates tended to dominate in spring and summer. Meanwhile, the dominance rate of diatoms in the phytoplankton community in Cheonsu Bay, which is located in a high-turbidity region, was 9~27 % greater than that of diatoms in the phytoplankton community found in the south coastal waters, which is a low turbidity region.

수산자원보호해역의 계절 및 해역별 식물플랑크톤 군집특성을 파악하기 위해, 2016년 천수만, 통영(I, II), 한산만, 진동만에서 식물플랑크톤 군집조성, 현존량 및 우점종을 조사하였다. 조사결과, 대부분의 환경요인(수온, 염분, 영양염류)은 계절적인 변화가 뚜렷한 반면 부유물질은 해역별 차이를 보였다. 식물플랑크톤 현존량은 평균 $13{\sim}4,062cells{\cdot}ml^{-1}$의 범위로 조사시기 및 해역에 따라 큰 변동범위를 보였다. 특히 천수만은 4월과 10월에 식물플랑크톤 대량증식(>$10^3cells{\cdot}ml^{-1}$)이 발생하였고, 우점종인 Skeletonema spp.(4월)와 Chaetoceros socialis(10월)가 시기적인 차이를 보였다. 조사해역의 식물플랑크톤 우점종은 Pseudo-nitzschia spp., Skeletonema spp., Chaetoceros pseudocriniuts 등의 돌말류와 와편모류인 Scrippsiella trochoidea, Tripos furca 등이 출현하였다. 계절적으로는 돌말류가 동 추계에 우점하는 반면 와편모류가 춘 하계에 우점하는 일반적인 연안특성을 보였다. 단, 지역적으로는 고탁도 해역인 서해에 위치한 천수만이 남해 해역보다 돌말류가 차지하는 비율이 9 ~ 27 %가 높았다.

Keywords

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