The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Characteristics of Meiofauna Community Inhabiting Continental Shelf of Yellow Sea, Korea

황해 대륙붕에 서식하는 중형저서동물 군집 특성

  • 정민규 (한국해양과학기술원 해양생태연구센터) ;
  • 김동성 (한국해양과학기술원 해양생태연구센터) ;
  • 강태욱 (국립공원공단 국립공원연구원 해양연구센터) ;
  • 오제혁 (한국해양과학기술원 해양생태연구센터) ;
  • 신아영 (한국해양과학기술원 해양생태연구센터) ;
  • 오철웅 (부경대학교 자원생물학과)
  • Received : 2021.09.02
  • Accepted : 2022.05.26
  • Published : 2022.05.31
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Abstract

This study aims to identify the community characteristics of meiofauna inhabiting the Yellow Sea continental shelf. To this end an annual survey was conducted considering the seasons from 2018 to 2020 at 13 stations with a depth of 18~90 m of the Yellow Sea located at latitudes 35, 36 and 37 degrees north latitude. The survey was conducted in three seasons of spring, summer, and autumn at 5 stations in October 2018, 9 stations in April 2019, and 6 stations in August 2020 was used to collect 3 repetitions at each station. The habitat density of meiobenthos in the surveyed area was in the range of 45~1029 inds./10 cm2, which was similar to the previous studies conducted in the Yellow Sea. The density of meiobenthos according to the seasons was 800±69 inds./10 cm2 in autumn, the highest, and the lowest at 260±48 inds./10 cm2 in summer. A total of 19 taxa appeared in meiobenthos, and the average value showed the number of nine taxa. Among the appearing taxa, the most dominant taxon was nematodes, accounting for 80.8% of the total density, followed by benthic copepods (8.8%) and benthic foraminifers (4.7%). As for the size distribution of medium benthic animals, the density of organisms corresponding to the size of 63~125 ㎛ was the highest, and 1~0.5 mm was the lowest. As for the vertical distribution in the sediments of medium benthic animals, the habitat density gradually decreased as the depth increased in the sediment surface layer. As a result of analysis of the N/C ratio, MPI, and ITD index using medium-sized benthic animals to identify the benthic environment, there were differences by season, but no values indicating pollution overall.

본 연구는 황해 중부해역의 대륙붕에 서식하는 중형저서동물의 군집 특성을 파악하기 위한 연구로서, 이를 위해 2018년부터 2020년까지 북위 35도, 36도, 37도에 위치한 수심 18~90 m의 13개 정점에서 조사를 수행하였다. 2018년 10월 5개 정점, 2019년 4월 9개 정점, 2020년 8월 6개 정점에서 봄, 여름, 가을의 3계절에 조사를 진행하였으며, 중형저서동물 시료는 직경 3.6 cm의 아크릴 코어러를 이용하여 각 정점에서 반복수 3회로 채집하였다. 조사해역의 중형저서동물의 서식밀도는 45~1029 inds./10 cm2범위로 이는 기존의 황해에서 진행되었던 국내 연안과 중국 중부해역 연구와 유사한 결과를 보였다. 중형저서동물의 계절에 따른 서식밀도는 가을에 800±69 inds./10 cm2로 가장 높은 서식밀도를 보였고, 여름에 260±48 inds./10 cm2로 가장 낮았다. 중형저서동물은 총 19개의 분류군이 출현하였으며, 평균값은 9개의 분류군 수를 보였다. 출현 분류군 중 가장 우점하는 분류군은 선충류로 전체 서식밀도의 80.8%로 나타났으며, 그 다음으로 저서성 요각류(8.8%), 저서유공충류(4.7%) 순으로 나타났다. 중형저서동물의 크기 분포는 63 ㎛의 망목을 통과하고 125 ㎛크기의 체에 걸러지는 생물의 서식밀도가 가장 높았으며 1~0.5 mm가 가장 낮게 나타났다. 중형저서동물의 퇴적물 내 수직적 분포는 퇴적물 표층에서 깊이가 깊어질수록 서식밀도가 점차 감소하는 양상을 보였다. 저서환경을 파악하기 위해 중형저서동물을 활용한 N/C ratio, MPI, ITD 지수 분석결과 계절별로 차이를 보이기는 하였으나, 전반적으로 오염을 나타내는 값은 나타나지 않았다.

Keywords

Acknowledgement

본 연구를 수행하기 위하여 생물시료 채집 등에 도움을 주신 한국해양과학기술원의 저서생물 연구실의 연구원분들과 연구선운항팀의 김현석 팀장님과 승조원분들, 김덕진 실장님을 포함한 관측사님들께 감사드리며, 이 논문은 한국해양과학기술원의 기본연구사업인 "한국 주변 해양생태계 변동 이해 및 대응 기반 연구(PEA0013)" 과제의 지원을 받았음을 밝힙니다.

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