Importance of Polar Phytoplankton for the Global Environmental Change

전 지구 환경변화에 대한 극지 식물플랑크톤의 중요성

  • 강성호 (한국해양연구소 극지연구센터) ;
  • 강재신 (한국해양연구소 극지연구센터) ;
  • 이상훈 (한국해양연구소 극지연구센터) ;
  • 김동선 (한국해양연구소 극지연구센터) ;
  • 김동엽 (한국해양연구소 극지연구센터)
  • Published : 2000.03.01

Abstract

There are increasing evidences of climate change in the Antarctic and Arctic Oceans, especially elevated temperature due to the continuous burning of the fossil fuels and ultraviolet B(UV-B) flux within the ozone hole. Light-dependent, temperature-sensitive, and fast-growing organisms respond to these physical and biogeochemical changes. Polar marine phytoplankton, which are pioneer endemic species and important carbon contributors in the polar waters, are therefore highly suitable biological indicators of such changes. By virtue of light requirement, the primary producers are exposed to extreme seasonal fluctuations in temperature, photosynthetically active radiation, and UV radiation. Local environmental warming and increased UV-B radiation during ozone depletion may have profound effects on the primary producers that are primary carbon producers in the polar water. Small changes in climate temperature and solar radiation may have profound effects on the activity threshold of the polar phytoplanktion. To demonstrate biological response to the environmental changes, standardized representative natural and biological parameters are needed so that replicate samples (including controls) can be taken over extended periods of time. In this paper, we review general characteristics of polar phytoplankton, their environment, environmental changes in the polar waters, the effects on the environmental changes to the polar phytoplankton, and the importance of the polar phytoplankton to understand the global environmental changes. [Biological indicators, Global environmental change, Polar phytoplankton, UV].

최근 극지 해양 생태계는 화석연료 사용의 증가로 인한 지구 온난화, 오존층 파괴에 의한 자외선 증가 등과 같은 전 지구 환경변화에 영향을 받고 있다. 지구 온난화와 오존층 파괴에 의한 수온 상승, 빙하 후퇴, 해수면 상승, 해빙 분포 변화, 자외선 증가 등으로 인해 극지 해양 생물들의 성장 환경이 변화하는 등 여러 가지 증후들이 극지 해양 생태계에 나타나고 있다. 특히 빛을 에너지원으로 하고, 온도에 민감하며, 빠르게 성장하는 일차생산자들인 식물풀랑크톤들이 극지 해양의 물리적, 생지화학적 환경 변화에 가장 민감하게 영향을 받고 있다. 전체 극지 해양 생태계를 유지하기 위한 주요 탄소 공급원인 식물플랑크톤의 변화는 전체 극지 해양 생태계의 변화를 의미한다. 식물플랑크톤들은 오랜 기간 극한 환경에 적응하여 왔기 때문에 미세한 환경변화를 쉽게 감지하고 감시하기 위한 생물학적 환경 변화 지표종으로 이용될 수 있다. 전 지구 환경변화에 따른 극지 해양 생태계의 변화 양상을 이해하기 위해서는 환경 변화에 민감하게 반응하는 극지 식물플랑크톤에 대한 연구가 선행되어야 하며 표준화되고 대표적인 식물플랑크톤 지표종의 선정이 필요하다. 이 총설에서는 극지 식물풀랑크톤의 일반적인 특징, 서식환경, 극지 해양의 환경 변화, 환경 변화에 따른 식물플랑크톤의 영향, 전 지구 환경변화를 이해하기 위한 극지 식물플랑크톤의 중요성에 대한 최근 연구 동향이 정리되어 있다.

Keywords

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