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2022 Vol.2, Issue 2

Original Articles

Winter Mixed Phytoplankton Blooms in the Lagoon Yeongrang Lake of East Sea in 2009

2009년 동해안 석호 영랑호의 겨울철 식물플랑크톤 혼합 대발생

Joon Sang Park1
,
Hyeong Min Joo2
,
Jin Hwan Lee3
,
Seung Won Jung1*
박 준상1
,
주 형민2
,
이 진환3
,
정 승원1*
1Library of Marine Samples, Korea Institute of Ocean Science & Technology, Geoje 53201, Korea
2Unit of Next Generation IBRV Building Program, Korea Polar Research Institute, Incheon 21990, Korea
3Department of Life Science, Sangmyung University, Seoul 03016, Korea
1한국해양과학기술원 해양시료도서관
2극지연구소 차세대 쇄빙연구선 건조사업단
3상명대학교 생명과학과
*Corresponding Author
31 December 2022. pp. 49-58
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Abstract

A lagoon is a brackish water lake where freshwater and seawater coexist, and as a transitional ecosystem that is an intermediate stage between freshwater and seawater ecosystems, it is easily exposed to environmental changes caused by natural or anthropogenic events due to its ecological, geological, and landscape characteristics. This study firstly reported the phytoplankton blooms in the lagoon Yongrang Lake in winter of 2009 and identified the causative species of the blooms. Quantitative and qualitative analysis of phytoplankton was performed at 3 sites of Youngrang Lake, and total abundances of phytoplankton was highly abundant with 4.68 ± 0.40 × 1010 cells mL-1. The causative species were 3 phytoplankton species, Cryptomonas cf. marssonii (55.5%), Paulinella ovalis (29.6%), and Heterocapsa rotundata (12.7%), and they accounted for 97.8% of the total phytoplankton abundance. The occurrence of mixed phytoplankton blooms is presumed to be due to differences in the ecological niche of each species. Since no red tide occurred in the winter of the following year, the red-tide was the temporary event in 2009. In the future, to maintain the lagoon ecosystem, the study of aquatic biota in this transitional ecosystem should be preferentially investigated with the continuous monitoring.

Keywords
Cryptomonas cf. marssonii
Heterocapsa rotundata
Paulinella ovalis
Winter phytoplankton blooms
Youngrang Lake

석호는 담수와 해수가 공존하는 기수호로 담수와 해수생태계의 중간단계인 전이생태계로써 생태학적, 지질학적, 경관적 특성상 자연적 또는 인위적 이벤트에 의한 환경변화에 쉽게 노출된다. 본 연구는 2009년 겨울철 동해안 석호인 영랑호에서 발생한 식물플랑크톤 대발생의 첫 보고와 함께 원인종의 규명을 규명하고자 수행되었다. 영랑호의 3개 정점에서 식물플랑크톤을 정량 및 정성분석을 하였고, 평균 4.68 ± 0.40 × 1010 cells mL-1의 높은 개체수가 확인되었다. 적조 원인종은 3종의 식물플랑크톤, Cryptomonas cf. marssonii (55.5%), Paulinella ovalis (29.6%), Heterocapsa rotundata (12.7%)이었고, 3종은 총 식물플랑크톤의 종조성의 97.8%를 차지하였다. 식물플랑크톤의 혼합된 대발생은 각 종의 생태적 지위의 차이에 의한 것이라 추정된다. 이듬해 겨울철에 식물플랑크톤 대발생이 발생하지 않은 것으로 보아 2009년 일시적으로 발생한 이벤트인 것으로 판단된다. 향후 석호 생태계의 유지를 위해 지속적인 모니터링 조사와 함께 전이생태계에 대한 수생생물상의 연구는 우선적으로 선행되어야만 할 것이다.

키워드
겨울철 식물플랑크톤 대발생
영랑호
Cryptomonas cf. marssonii
Heterocapsa rotundata
Paulinella ovalis
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Information
  • Publisher :The Korean Society of Phycology
  • Publisher(Ko) :한국조류학회
  • Journal Title :Aquatic Nature
  • Journal Title(Ko) :수생생물
  • Volume : 2
  • No :2
  • Pages :49-58
  • Received Date : 2022-10-02
  • Revised Date : 2022-11-08
  • Accepted Date : 2022-11-09
  • DOI :https://doi.org/10.23135/an.2022.2.2.1
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