Journal of the Korean Geographical Society (대한지리학회지)

The Korean Geographical Society (대한지리학회)
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Phytolith Analysis of Sediments in the Lake Gyeongpo, Gangneung, Korea and Climatic Change in the Holocene

경포호의 식물규소체(phytolith) 분석과 Holocene 기후변화

  • Yoon, Soon-Ock (Dept. of Geography and Research Institute for Basic Sciences, Kyung Hee University) ;
  • Kim, Hyo-Seon (Dept. of Geography, Kyung Hee University) ;
  • Hwang, Sang-Ill (Dept. of Geography, Kyungpook National University)
  • 윤순옥 (경희대학교 지리학과 및 기초과학연구소) ;
  • 김효선 (경희대학교 지리학과) ;
  • 황상일 (경희대학교 지리학과)
  • Published : 2009.12.31
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Abstract

Phytolith analysis was made on a 660cm core from Lake Gyeongpo in the East Sea of Korean Peninsula to clarify the environmental change including climate and agricultural characteristics during the Holocene. From the results of phytolith analysis, six phytoliths assemblage zone(PAZ) were recognized from the base to the surface. PAZ I around 5,000 yr BP suggests the transition from the warm and dry to the cool and wet climatic conditions. The climate of PAZ II(ca. 4,000-2,000 BP) was kept on warm, but repeated between dry and wet conditions. PAZ III(2,000~1,000 yr BP) suggests the expansion of agricultural activities under the warm and humid climatic conditions due to the significant phytoliths production of Paniceae and Oryza sativa. While PAZ IV(1,000~500 yr BP) indicates very cool and dry conditions, PAZ V and IV suggest the warm-dry and cool-humid climatic conditions, respectively. Similar to the results of pollen analysis in the lake, the agricultural activities were recognized by PAZ III around 2,000 yr BP from the results of phytolith analysis, and the rice cultivations such as Oryza sativa have been expanded since 2,000 yr BP or later.

한국 동해안 경포호에서 보링한 두께 660cm의 퇴적물로 식물규소체(phytolith) 분석을 행하여 Holocene 기후 및 환경 변화와 농경의 특성을 밝혔다. 분석 결과 기저부에서 지표층까지 여섯 개의 식물규소체 분대가 구분되었다. PAZI은 약 5,000년 BP를 전후하여 온난, 건조하였고 이후 냉량, 습윤하였다. PAZII(4,000-2,000년 BP 경)는 온난하였으나, 건-습 환경이 교대로 반복하였다. PAZIII(2,000-1,000년 BP 경) 시기는 기장족과 재배벼를 포함하는 규소체가 다량 산출하여 온난, 습윤한 기후환경에서 농경이 확대되었음을 지시한다. PAZIV(1,000-500년 BP 경) 시기에는 냉량, 건조하였고 이후 PAZV와 IV시기에는 짧은 시기동안 다시 온난, 건조 및 냉량, 습윤한 환경으로 변화하였다. 경포호의 화분분석 결과와 유사하게 식물규소체 분석 결과에서도 농경은 PAZIII시기를 중심으로 약 2,000년 BP 경 확대되었으나 재배벼(Oryza sativa) 중심의 벼농사는 다소 후기에 확대되었다.

Keywords

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