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울산 반구대 암각화 인근 트렌치 퇴적물 내 규조의 환경 특성

박영숙;류춘길;조미순
Bak, Young-Suk;Ryu, Choon Kil;Cho, Mi-Soon

  • 투고 : 2015.12.14
  • 심사 : 2016.01.08
  • 발행 : 2016.02.29

초록

울산 반구대 암각화 부근에 분포하는 퇴적층을 대상으로 사연댐 건설 전과 후의 퇴적환경을 알아보기 위해서 규조를 연구하였다. 사연댐 건설 이전의 하부 퇴적층으로 부터는 규조가 산출되지 않았으며, 사연댐 건설 이후의 퇴적층(두께 228 cm)으로부터 규조가 감정되었다. 규조는 총 27속 75종이 산출 되었으며 개체수 농도의 범위가 $0.2{\times}10^5-5.8{\times}10^5g^{-1}$로 나타났다. 연구지역에서 산출된 규조 종의 산출분포에 의해서 사연댐 건설 후 퇴적된 퇴적물로부터 4개의 군집대를 설정하였다; 규조 군집대 I: 228-150 cm, 규조 군집대 II: 150-122 cm, 규조 군집대 III: 122-62 cm, 규조 군집대 IV: 62-0 cm. 또한, 환경지시종에 따라 부영양화, 산성도, $Cl^-$ 값 등에 대한 해석을 수행하였다. 부영양화와 $Cl^-$ 값에 대한 결과는 74 cm 층준을 기준으로 하부 층준에서는 부영양화의 정도가 중간-높음으로 $Cl^-$ 값은 낮게 나타났으며, 상부 층준에서는 부영양화가 낮음, $Cl^-$ 값이 높음으로 나타났다. 산성화의 정도는 122 cm 층준의 하부에서는 중성-알칼리성을 띠며 상부에서는 산성을 나타내었다. 특히, 영양염류의 경우, 175 cm 층준에서는 TP값이 높고, 62 cm 층준에서는 TN값이 높게 나타났다

키워드

규조;반구대암각화;군집대;부영양화;산성도;$Cl^-$

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과제정보

연구 과제번호 : 울주 반구대 암각화 일원 지형복원 및 고환경 변화 연구

연구 과제 주관 기관 : 국립문화재연구소