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북동중국해 대륙붕 저서성 유공충 군집 분포와 형성 기작
The Formation Mechanism and Distribution of Benthic Foraminiferal Assemblage in Continental Shelf of the northern East China Sea 원문보기

한국해양생명과학회지 = Journal of marine life science, v.8 no.1, 2023년, pp.8 - 31  

정다운 (전남대학교 수산과학연구소) ,  이연규 (전남대학교 해양융합과학과)

초록
AI-Helper 아이콘AI-Helper

북동중국해 대륙붕 표층 퇴적물에서 산출하는 저서성 유공충의 군집 분포와 형성 기작을 파악하기 위하여 32개 정점에서 표층 퇴적물을 채취하고, 입도조성, 저서성 유공충 군집분석, 14C 연대측정을 실시하였다. 표층 퇴적물은 사질(평균: 52.04%)의 잔류 퇴적물과 니질(평균: 47.92%)의 현생 퇴적물과의 혼합 퇴적상이다. 저서성 유공충은 총 48속 104종(사질 유공충, 석회질 유리상 및 석회질 자기상 유공충)이 분류되었다. 사질 유공충은 양쯔강 앞 해역으로 산출빈도(30%)가 증가하며, 부유성 유공충은 제주 남서해역에서 높은 산출빈도를 보인다. 우점종은 Ammonia ketienziensis, Bolivina robusta, Eggella advena, Eilohedra nipponica, Pseudorotalia gaimardii, Pseudoparrella naraensis 총 6종이다. 이들 중 가장 높은 산출빈도를 보이는 Bolivina robusta와 Pseudorotalia gaimardii의 14C 연대측정 결과 각각 2,360±40 B.P., 2,450±40 B.P.로 나타났다. 군집분석 결과, P. gaimardii 군집, B. robusta 군집 및 A. ketienziensis-P. naraensis 군집으로 대별된다. 양쯔강 담수 유입 영향을 받는 양쯔강 앞 해역에는 P. gaimardii 군집, 쿠로시오 해류의 영향을 받는 제주도 남서해역에서 B. robusta 군집 그리고 북서측 황해 중앙부 니질대 해역에 A. ketienziensis-P. naraensis 군집이 분포한다. 이러한 저서성 유공충 군집 조성 및 분포는 약 2.5 ka BP 부터 형성되기 시작하였으며, 홀로세 후기 해수면 상승에 의한 저서 생태계 서식지 환경 변화를 반영하고 있는 것으로 생각된다.

Abstract AI-Helper 아이콘AI-Helper

To understand the distribution and formation mechanism of benthic foraminiferal assemblages, grain size analysis, 14C radiocarbon dating, and benthic foraminifera analysis were conducted on thirty-two surface sediments collected from the continental shelf of the northern East China Sea, respectively...

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문제 정의

  • 본 연구에서는 북동중국해 대륙붕 표층 퇴적물에서 산출하는 저서성 유공충의 종 다양성을 파악하고 군집 분포와 형성 기작을 이해하고자 하였다. 그 결과, 32개 정점에서 사질 유공충 8속 18종, 석회질 유리상 유공충 36속 77종, 석회질 자기상 유공충 4속 9종 총 48속 104종을 분류하고, 지역별로 P.
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AI-Helper
안녕하세요, AI-Helper입니다. 좌측 "선택된 텍스트"에서 텍스트를 선택하여 요약, 번역, 용어설명을 실행하세요.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.

선택된 텍스트

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