Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Effects of Climate Change on Whitening Event Proliferation the Coast of Jeju

제주연안에서 기후변화가 갯녹음 확산에 미치는 영향

  • 황성일 ((주) 수중생태기술연구소) ;
  • 김대권 ((주) 수중생태기술연구소) ;
  • 성봉준 ((주) 수중생태기술연구소) ;
  • 전수경 ((주) 수중생태기술연구소) ;
  • 배종일 ((주) 수중생태기술연구소) ;
  • 전병현 ((주) 수중생태기술연구소)
  • Received : 2017.07.25
  • Accepted : 2017.11.29
  • Published : 2017.12.29
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Abstract

The study is intended to investigate the proliferation of whitening, the impact of climate change (sea temperature rise) on the proliferation of whitening, and the reproduction and growth of crustose coralline algae, which causes the whitening, in the coast of Jeju Island. The size of the whitening-affected area in the coast of Jeju was 2,931ha in 1998 and increased to 4,541ha in 2003. The whitening occurred mainly in the southern coast of Jeju in 1998 but spread across the whole coast of Jeju by 2003, except in the coast of Jocheon-eup (eup refers to an administrative district in Korea) and Gujwa-eup. The average sea water temperature in February from 1992 to 2004 was $15.1^{\circ}C$ in the whitening affected area and $13.9^{\circ}C$ in the marine forest area, showing a clear difference, but there was no difference in the average temperature in August. The long-term (37-year period) average of the sea temperature was $15.3^{\circ}C$ in the whitening affected area and $14.1^{\circ}C$ in the marine forest area, showing $1.2^{\circ}C$ higher in the whitening area. The annual rate of sea temperature rise was $0.038^{\circ}C$ in the whitening area and $0.024^{\circ}C$ in the marine forest area, indicating the higher long-term variation of sea temperature in the water affected by whitening. The results indicate that the continuous increase in winter water temperature due to climate change is expanding proliferation of whitening in the Jeju island.

이 연구는 제주연안 해역에서 갯녹음의 확산동향과 기후변화로 인한 동계 수온변화(수온상승)가 갯녹음 확산에 미치는 영향을 알아보고 갯녹음 원인생물인 무절석회조류의 번식과 생장을 파악하기 위해 연구되었다. 제주연안의 갯녹음 발생면적은 1998년에는 2,931ha였으나, 2003년에는 4,541ha로 증가하였다. 발생해역도 1998년은 제주도 남부해역에서 주로 발생했으나, 2003년에는 조천읍, 구좌읍을 제외한 제주도 전역으로 확산되었다. 1992년부터 2004년까지 관측된 2월 평균수온은 갯녹음 해역 $15.1^{\circ}C$, 해중림 해역 $13.9^{\circ}C$로 갯녹음 해역이 $1.2^{\circ}C$가 높게 나타나 두 해역 간 뚜렷한 차이를 보였으나, 8월 수온은 두 해역 간 차이가 없었다. 수온의 장기변동(37년)에서도 갯녹음 해역이 평균 $15.3^{\circ}C$인데 비하여 해중림 해역은 평균 $14.1^{\circ}C$로 갯녹음 해역이 해중림 해역보다 $1.2^{\circ}C$가 높게 나타났다. 연간 수온 증가 값은 갯녹음 해역이 매년 $0.038^{\circ}C$씩 증가하고 있는 반면, 해중림 해역은 $0.024^{\circ}C$씩 증가하여 장기 수온변동은 갯녹음 해역이 해중림 해역보다 높았다. 이와 같이 기후변화로 인한 지속적인 동계 수온상승은 제주도 갯녹음을 확대시키고 있음을 시사하고 있다.

Keywords

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