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

  • 제27권5호
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  • Pages.630-638
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  • 2021
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  • 1229-3431(pISSN)
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  • 2287-3341(eISSN)
해양환경안전학회 (The Korean Society of Marine Environment and safety)
권호 표지
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와편모조류 Alexandrium affine의 생장에 미치는 용존태 무기 및 유기 영양염(질소와 인)의 영향

Effects of Dissolved Inorganic and Organic Nutrient (Nitrogen and Phosphorus) on the Growth of Dinoflagellate Alexandrium affine

  • 오석진 (부경대학교 해양학과) ;
  • 김지혜 (부경대학교 해양학과) ;
  • 박경우 (국립수산과학원 기후변화연구과) ;
  • 김석윤 (부경대학교 해양학과)
  • Oh, Seok Jin (Department of Oceanography, Pukyong National University) ;
  • Kim, Ji Hye (Department of Oceanography, Pukyong National University) ;
  • Park, Kyung Woo (Oceanic Climate and Ecology Research Division, National Institute of Fisheries Science) ;
  • Kim, Seok-Yun (Department of Oceanography, Pukyong National University)
  • 투고 : 2021.07.12
  • 심사 : 2021.08.27
  • 발행 : 2021.08.31
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초록

본 연구에서는 와편모조류 Alexandrium affine(LIMS-PS-2345)의 생장에 미치는 용존태 무기 및 유기 영양염의 영향을 조사하였다. 영양염 흡수 동력학 실험에서 A. affine의 최대흡수속도(ρmax)와 반포화상수(Ks)는 질산염에서 77.0 pmol/cell/hr과 17.6 μM, 인산염에서 15.5 pmol/cell/hr과 3.88 μM로 산출되어, 무기영양염에 대하여 높은 요구량 및 낮은 친화성을 가지고 있는 것으로 나타났다. 유기 영양염에 따른 A. affine의 생장속도를 확인한 결과, 유기 질소 urea, glycine와 유기 인 adenosine triphosphate(ATP), glycerol phosphate(Glycerol-P) 첨가구에서 무기 영양염 첨가구의 70 % 이상 생장속도를 보였다. 따라서 낮은 무기 영양염 환경에서 A. affine의 우점화와 종간경쟁에서 우위를 위해서는 용존태 유기 영양염의 이용이 필요할 것으로 생각된다.

In this study, we investigated the effects of dissolved inorganic and organic nutrient on the growth of dinoflagellate Alexandrium affine (LIMS-PS-2345). The maximum uptake rates (ρmax) and half saturation constants (Ks) calculated from the uptake kinetics experiment were 77.0 pmol/cell/hr, 17.6 μM for nitrate and 15.5 pmol/cell/hr, 3.88 μM for phosphate, respectively. These results suggested that this species has high inorganic nutrient demand and a low affinity for inorganic nutrients. During the utilization of organic nutrients for A. affine, growth rates of experimental groups added by organic nitrogen (urea and glycine) and phosphorus (adenosine triphosphate and glycerol phosphate) were above 70 %, compared to the experimental groups added by inorganic nutrients. Thus, A. affine may need to utilize organic nutrients to understand the dominant strategy and advantageous position in the interspecific competition within low inorganic nutrient environments.

키워드

과제정보

이 논문은 부경대학교 자율창의학술연구비(2019년)에 의하여 연구되었습니다.

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