한국해양환경ㆍ에너지학회지 (Journal of the Korean Society for Marine Environment & Energy)

  • 제19권2호
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  • Pages.144-150
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  • 2016
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  • 2288-0089(pISSN)
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  • 2288-081X(eISSN)
한국해양환경•에너지학회 (The Korean Society for Marine Environment and Energy)
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동해 남서해역에서 입자성 유기탄소와 질소의 시·공간적 분포 특성

Spatio-Temporal Distribution of Particulate Organic Carbon (POC) and Nitrogen (PON) in the Southwestern Area of East Sea

  • Oh, Seok Jin (Department of Oceanography, Pukyong National University) ;
  • Jeong, Semi (Department of Oceanography, Pukyong National University) ;
  • Kim, Seok-Yun (Department of Oceanography, Pukyong National University)
  • 투고 : 2016.02.15
  • 심사 : 2016.04.08
  • 발행 : 2016.05.25
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초록

동해 남서해역에서 입자성 유기탄소와 질소의 시 공간적인 분포 특성을 파악하기 위해서 2011년 9월(하계), 2012년 1월(동계) 그리고 5월(춘계)에 조사하였다. 9월 표층수는 용승 현상에 따른 냉수괴가 관찰되지 않았지만, 높은 chlorophyll a(Chl-a) 농도, 낮은 비광합성 유기입자물질 비율(27%) 그리고 낮은 POC/PON 비(6.2)로 활발한 아미노산 및 단백질 합성을 의미하는 높은 기초생산을 보였다. 하지만, 2012년 5월에는 높은 비광합성 유기입자물질(66%)과 높은 POC/PON 비(8.1)에 근거할 때, 9월과 비교하여 상대적으로 낮은 생산성을 보였다. 이와 같이 식물플랑크톤의 대량 발생이 주로 춘계에 발생한다는 기존의 결과와 상반되며, 이는 춘계 대발생 후기의 동물플랑크톤에 의한 페오피그먼트(phaeopigment)의 증가 때문으로 해석된다. 따라서 입자성 유기물질의 조성은 같은 계절이라도 해양환경의 변화에 따라 달라질 것으로 보인다.

In southwestern East Sea, we investigated the spatio-temporal distribution characteristics of particulate organic carbon (POC) and nitrogen (PON) in September 2011 (summer), January (winter) and May 2012 (spring). Although cold waters known as the origin upwelling in the surface layer of September were not observed, this periods showed high primary productivity because of high concentrations of chlorophyll, low percentage of non-autotrophic particulate fraction among POC calculated by POC/Chl-a ratio (27%) and low POC/PON ratio (6.2), which means active amino acid and protein synthesis, However, May, 2012 showed low primary productivity because of high percentage of non-autotrophic particulate fractions among POC (66%) and high POC/PON ratio (8.1), Although spring bloom and high primary productivity has been reported in the East Sea, high percentage of non-autotrophic particulate fractions in POC, observed in the East sea during the post 2012 spring, is suggested to be due to the increase of phaeo-pigment during post spring bloom. Thus, composition of particulate organic matter may have sensitively changed by marine environmental factors in spite of same season.

키워드

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