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Article

Weekly Variation of Phytoplankton Communities in the Inner Bay of Yeong-do, Busan

부산 영도 내만에서 식물플랑크톤 군집의 주간 변동 특성

WONSEOK YANG12
,
DONG HAN CHOI34
,
JONGSEOK WON12
,
JIHOON KIM12
,
MYUNG JIN HYUN5
,
HAEUN LEE6
,
YEONJUNG LEE7
,
JAE HOON NOH34*
양 원석12
,
최 동한34
,
원 종석12
,
김 지훈12
,
현 명진5
,
이 하은6
,
이 연정7
,
노 재훈34*
1Graduate Student, Department of Convergence Study on the Ocean Science and Technology Ocean Science and Technology School, Korea Maritime and Ocean University, Busan 49112, Korea
2OST Student-in-Training, Marine Ecosystem Research Center, Korea Institute of Ocean Science & Technology, Busan 49111, Korea
3Professor, Department of Convergence Study on the Ocean Science and Technology Ocean Science and Technology School, Korea Maritime and Ocean University, Busan 49112, Korea
4Principal Research Scientist, Marine Ecosystem Research Center, Korea Institute of Ocean Science & Technology, Busan 49111, Korea
5UST Student, Marine Ecosystem Research Center, Korea Institute of Ocean Science & Technology, Busan 49111, Korea
6Post Master Scientist, Marine Ecosystem Research Center, Korea Institute of Ocean Science & Technology, Busan 49111, Korea
7Senior Research Scientist, Marine Ecosystem Research Center, Korea Institute of Ocean Science & Technology, Busan 49111, Korea
1한국해양대학교 해양과학기술전문대학원 해양과학기술융합학과 대학원생
2한국해양과학기술원 해양생태연구센터 OST 협동연구생
3한국해양대학교 해양과학기술전문대학원 해양과학기술융합학과 교수
4한국해양과학기술원 해양생태연구센터 책임연구원
5한국해양과학기술원 해양생태연구센터 UST학생연구원
6한국해양과학기술원 해양생태연구센터 연수연구원
7한국해양과학기술원 해양생태연구센터 선임연구원
*Corresponding Author
30 November 2021. pp. 356-368
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Abstract

To understand the temporal variation of phytoplankton communities in a coastal area, the biomass and diversity were weekly investigated in the inner bay of Yeong-do, Busan. In the study area, chlorophyll a concentration ranged from 0.43~7.58 mg m-3 during the study, indicating the study area was in mesotrophic or eutrophic status. The fractions of chlorophyll a occupied by large phytoplankton (> 3 µm diameter) exhibited an average of 80% of total chlorophyll a in this study. Among the large phytoplankton, while Bacillariophyta was the most dominant in spring and summer, Cryptophyceae prevailed in the fall and winter. On the contrary, in the picophytoplankton community less than 3 µm in diameter, Mamiellophyceae was the most dominant in most seasons, Cryptophyceae was relatively high with an average of 17.7 ± 17.6% throughout the year, but seasonal variations were large. Dinophyceae rarely occupied a higher fraction up to 60.4% of the picophytoplankton community. By weekly monitoring at a coastal station for 13 months, it is suggested that phytoplankton communities in coastal waters could be changed on a short time scale. If data are steadily accumulated at the time-series monitoring site for a long time, these will provide important data for understanding the long-term dynamics of phytoplankton as well as the impact of climate and environmental changes.

Keywords
Weekly variation
Seasonal variation
Phytoplankton diversity
Plastid-16S rRNA

연안역에서 나타나는 식물플랑크톤 군집의 연중 변동 특성을 확인하기 위하여, 일 년여간 부산 영도 내만의 고정점에서 생물량 및 다양성을 매주 조사하였다. 연구 해역은 엽록소 a가 0.43~7.58 mg m-3 범위를 나타내어 중영양에서 부영양 특성을 나타내었다. 조사 기간 동안 엽록소 a 중 3 µm 이상 크기의 식물플랑크톤이 차지하는 비율은 평균 80% 내외를 차지하여 높았다. 이들 3 µm 이상 크기의 식물플랑크톤에서는 규조류(Bacillariophyta)가 봄과 여름에 가장 우점하였으며, 가을과 겨울에는 은편모조강(Cryptophyceae)이 우점하였다. 반면, 3 µm 이하 크기의 초미소식물플랑크톤에서는 마미엘라강(Mamiellophyceae)이 대부분의 시기에 가장 우점하였으며, 은편모조강(Cryptophyceae)이 연중 평균(+표준편차) 17.7 ± 17.6%로 비교적 높았으나 계절적 변동이 컸다. 와편모조강(Dinophyceae)은 드물지만 60.4%까지 매우 높게 우점하기도 하였다. 본 연구에서 13개월 간 일주일 간격의 정기 관측을 통해 육지에 인접한 천해 연안 식물플랑크톤 군집이 짧은 시간 규모에서 변동함을 파악할 수 있었다. 이러한 지속적인 고정점 관측은 식물플랑크톤의 단·장기 변동 특성과 기후 및 환경 변화의 영향을 이해하는 데 중요한 자료를 제공할 수 있을 것이다.

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Information
  • Publisher :The Korean Society of Oceanography
  • Publisher(Ko) :한국해양학회
  • Journal Title :The Sea Journal of the Korean Society of Oceanography
  • Journal Title(Ko) :한국해양학회지 바다
  • Volume : 26
  • No :4
  • Pages :356-368
  • Received Date : 2021-01-09
  • Revised Date : 2021-07-30
  • Accepted Date : 2021-10-07
  • DOI :https://doi.org/10.7850/jkso.2021.26.4.356
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