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2025 Vol.5, Issue 2

Original Articles

Correlation between Pyropia Production and Environmental Factors in Saemangeum Sea Area

새만금 해역에서의 김 생산량과 환경인자의 상관관계 연구

Ji Hong Chae1
,
Jaeseong Kim2
,
Young Sik Kim1*
채 지홍1
,
김 재성2
,
김 영식1*
1Department of Marine Biology, Kunsan National University, Kunsan 54150, Korea
2Water & Eco-Bio Co. Ltd., Kunsan 54156, Korea
1국립군산대학교 해양생물자원학과
2㈜워터앤에코바이오
*Corresponding Author
31 December 2025. pp. 15-27
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Abstract

To understand the effects of environmental factors on the quantitative fluctuations of farmed Pyropia spp. in the Saemangeum Sea area, we analyzed changes in water quality using the Marine Environment Information System. Our findings indicate that the concentration of chlorophyll-a has been increasing, whereas the concentrations of dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphate (DIP), which are essential for Pyropia growth, have gradually decreased. Similarly, both total nitrogen (T–N) and total phosphate (T–P) have also shown a decreasing trend. A significant decline in Pyropia production was observed in 2015, including reductions in total production, yield per chaek (yield per unit area), and sales revenue. A more detailed analysis of water quality in November 2014 and February 2015 revealed that DIN and DIP concentrations were significantly lower than the 21-year average and approached the threshold levels associated with Pyropia chlorosis. This suggests that reduced levels of dissolved inorganic nutrients may have played a significant role in the decreased Pyropia production in 2015. However, because similar nutrient conditions in other years did not cause production problems, it is difficult to attribute changes in Pyropia production solely to nutrient concentrations. Therefore, future studies on Pyropia production should consider not only the influence of the marine environment but also management factors such as pest outbreaks, chlorosis, and farming density.

Keywords
environmental factors
production
Pyropia
Saemangeum Sea area

새만금 해역에서 생산되는 양식 김(Pyropia spp.)의 양적 변동에 환경인자가 미치는 영향을 이해하기 위해, 해양환경정보시스템을 활용한 수질 변화를 분석하였다. 분석 결과, 엽록소-a의 농도는 증가하는 반면, 김 생장에 필수적인 용존 무기질소(DIN)와 용존 무기인(DIP)의 농도는 점차 감소하는 것으로 나타났다. 마찬가지로, 총질소(T–N)와 총인(T–P) 농도도 감소 경향을 보였다. 2015년에는 김 생산성이 크게 감소하였으며, 총 생산량, 책 단위당 수확량, 생산액 모두 감소하였다. 2014년 11월과 2015년 2월의 수질을 분석한 결과, DIN과 DIP의 농도는 최근 21년 간의 평균 값에 비해 현저히 낮았으며, 김의 황백화 현상과 관련된 임계치에 근접하였다. 이는 용존 무기 영양염류의 감소가 2015년 김 생산성 감소에 중요한 역할을 했을 수 있음을 시사한다. 그러나 다른 해에도 유사한 영양염 조건이 나타났음에도 불구하고 생산성 문제가 발생하지 않은 점을 고려할 때, 김 생산성 감소를 영양염 농도만으로 단정하기는 어렵다. 따라서 김의 생산성은 당해 해양환경의 영향과 갯병 발생, 황백화, 양식밀도 등 관리 측면도 고려한 연구가 필요할 것으로 사료된다.

키워드
김
새만금 해역
생산성
환경인자
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Information
  • Publisher :The Korean Society of Phycology
  • Publisher(Ko) :한국조류학회
  • Journal Title :Aquatic Nature
  • Journal Title(Ko) :수생생물
  • Volume : 5
  • No :2
  • Pages :15-27
  • Received Date : 2025-12-05
  • Revised Date : 2025-12-12
  • Accepted Date : 2025-12-14
  • DOI :https://doi.org/10.23135/an.2025.5.2.1
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