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해양환경 변화로 인한 2018~2020년 동해 식물플랑크톤 크기 구조 변화
Changes in phytoplankton size structure in the East Sea 2018-2020 due to marine environment change 원문보기

환경생물 = Korean journal of environmental biology, v.40 no.1, 2022년, pp.54 - 69  

박경우 (국립수산과학원 기후변화연구과) ,  오현주 (국립수산과학원 기후변화연구과) ,  황재동 (국립수산과학원 기후변화연구과) ,  문수연 (국립수산과학원 기후변화연구과) ,  이민욱 (국립수산과학원 기후변화연구과) ,  윤석현 (국립수산과학원 기후변화연구과)

초록
AI-Helper 아이콘AI-Helper

동해 연근해 해역에서 식물플랑크톤 군집의 분포 특성을 파악하기 위해 2018년부터 2020년까지 계절적으로 13개 정점을 대상으로 조사를 실시하였다. 그 결과 동계에는 규조류인 Chaetoceros curvisetus가 최우점종으로 출현하고 있었으며, 동계를 제외한 전 계절에에 미동정 미소편모조류가 우점하는 것으로 나타났다. 식물플랑크톤의 크기별 구성에서도 연간 계절별 평균 범위는 소형 20.6~26.2%, 미소 27.1~35.9%와 초미소 40.8~49.9%를 나타내었다. 성층이 형성되는 시기인 춘계, 하계 및 추계 표층 혼합층 내에서 미소와 초미소식물플랑크톤의 구성비가 높았다. 특히, 하계 표층 수온 상승이 예년에 비해 높아짐에 따라 수괴 안정도는 증가하고 있었으며 이로 인하여 성층이 강화됨에 따라 저층으로부터 표층으로의 영양염 유입이 감소하여 표층 혼합층 내 미소와 초미소식물플랑크톤의 구성비가 77.9%로 가장 높은 특징을 나타내었다. 동해 연근해 해역의 식물플랑크톤 군집의 크기 구조는 상당히 소형화가 진행되었으며, 이로 인하여 복잡한 미세먹이망 구조를 형성하며 상위 소비자 단계로의 총 탄소량 전달을 낮춰 전체적인 생산력은 낮아질 것으로 판단된다.

Abstract ▼ AI-Helper 아이콘AI-Helper

We conducted a field survey from 2018 to 2020 to analyze the spatial distribution of phytoplankton communities at 13 stations in the East Sea. The diatom Chaetoceros curvisetus appeared as the dominant species in winter, and small flagellates less than 20 ㎛ prevailed in all seasons except win...

주제어

#surface water temperature rises   #Ocean stratification   #Chl-a size fraction   #phytoplankton miniaturized   #phosphate restriction  

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