Ocean and Polar Research

  • 제45권3호
  • /
  • Pages.113-123
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  • 2023
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  • 1598-141X(pISSN)
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  • 2234-7313(eISSN)
한국해양과학기술원 (Korea Institute of Ocean Science & Technology)
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영산강 하구에서 부식산이 식물플랑크톤에 미치는 영향

Response of Size-fractionated Phytoplankton to Humic Acids in the Seawater of Yeongsan River Estuary

  • 김세희 (목포해양대학교 해양시스템공학과) ;
  • 신용식 (목포해양대학교 해양시스템공학과)
  • Sehee Kim (Department Ocean System Engineering, Mokpo National Maritime University) ;
  • Yongsik Sin (Department Ocean System Engineering, Mokpo National Maritime University)
  • 투고 : 2023.07.24
  • 심사 : 2023.09.06
  • 발행 : 2023.09.30
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초록

Humic substances are refractory organic compounds that are relatively low in biological activity but known to stimulate phytoplankton growth in estuarine and marine environments. The effect of humic substances on phytoplankton growth was investigated in the seawater zone of the Yeongsan River estuary where an episodic anthropogenic freshwater is discharged, affecting its water properties directly. Water samples and data of water properties were collected at three stations (Sts. A-C) along the channel of the seawater zone in February, May, August and November, 2009. The collected water samples were incubated after humic acids (HA) were added in mesocosm experiments. Phytoplankton (chlorophyll-a) were fractionated into net- (> 20 ㎛) and nano-size (< 20 ㎛) to examine the response of phytoplankton according to size. Their response to HA treatment was assessed by repeated measures analysis of variance (RM-ANOVA). The experiments showed that phytoplankton biomass (chlorophyll-a) significantly increased after HA were added at the stations near the sea dike. Especially, nano-sized chlorophyll-a concentrations increased significantly throughout the seasons. This indicates that understanding the behavior of refractory organic matters such as humic substances is required to better manage altered estuarine ecosystems including the Yeongsan River estuary which are affected by episodic discharge of freshwater from sea dikes.

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과제정보

좋은 논문이 될 수 있도록 면밀히 검토해주신 심사위원님들과 현장조사 및 실험에 참여해주신 목포해양대학교 해양환경미생물 연구실 연구원분들께 감사드립니다.

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