본 연구에서는 장기간 운영된 양식장에 휴지기가 주어졌을 때, 양식장 주변 퇴적 환경에서 나타나는 회복상태를 규명하고자 하였으며, 이를 위해 경남 통영의 수하식 굴양식장 일대에서 대형저서다모류 군집을 조사하였다. 2016년 7월부터 2018년 9월까지 20년 간 운영된 후 폐쇄된 양식장(FF), 양식장의 이동으로 새롭게 설치된 양식장(NF), NF와 인접한 비교대상의 굴양식장(CF), 그리고 양식시설이 없는 두 개의 대조지역(Con1, Con2) 등 5개 정점에서 현장조사를 수행하였다. 출현종수와 서식밀도는 여름철에 감소하고 늦가을철 부터 증가하는 계절 변동을 보였으며, 양식장 정점들이 비양식장 정점들에 비해 높았다. 출현종의 상위우점종은 비양식장 정점에서는 Paraprionospio patiens, 양식장 정점에서는 Capitella capitata로 차이를 보였으나, 두 종 모두 유기물이 심한 지역에서 출현하는 잠재적 유기물 오염지시종으로 조사지역 저서환경의 유기물 오염이 상당히 진행되었음을 나타내었다. 다변량분석 결과, FF가 Con1과 군집구조가 유사한 수준으로 변화하였지만 Con1 이상의 상태로 회복을 나타내지 않았다.

The recovery of the sedimentary environment around a fallowing shellfish farm during its rest period after 20 years of long-running operation, was explored in Tongyeong Bay of Korea. Seasonal survey on macrobenthos community was conducted from July 2016 to September 2018 at five stations, which included the fallowing shellfish farm after 20-year operation (FF), a newly installed shellfish farm (NF), a shellfish farm for comparison around the closed shellfish farm (CF), and control stations with no farming activities (Con1, Con2). The total number of species and the density of macrobenthos were higher at the shellfish farm stations than the non-shellfish farm station, and their seasonal changes were significant. The dominant species at the shellfish farm stations was Capitella capitata while Paraprionospio patiens was dominant at the non-shellfish farm stations. The two dominant species were potential organic contamination indicators usually inhabiting the areas with dense organic matter. This suggests that the overall survey area was highly polluted with organic matters. Multivariate analysis showed that the macrobenthic community of CF changed to a level similar to that of Con1 immediately after the investigation, but not to a state above the Con1 level. Furthermore, the changes in NF were not significant when compared to those in CF.

요 약
Abstract
1. 서 론
2. 재료 및 방법
    2.1 연구 지역
    2.2 퇴적물 유기물 분석 및 저서동물 분석
    2.3 자료분석
3. 결과 및 고찰
    3.1 퇴적물 특성의 시간변화
    3.2 저서다모류 군집의 생태지수
    3.3 저서다모류 우점종의 변화
    3.4 어장환경평가에 따른 어장 건강도 진단
    3.5 저서다모류 군집의 다변량 분석
    3.6 저서동물 분석을 통한 휴식기간에 따른 양식장 환경의회복성 진단
References

• 박소현(국립수산과학원 어장환경과) | Sohyun Park (Marine Environment Research Division, National Institute of Fisheries Science)
• 김선영(국립수산과학원 어장환경과) | Sunyoung Kim (Marine Environment Research Division, National Institute of Fisheries Science)
• 심보람(국립수산과학원 어장환경과) | Bo-Ram Sim (Marine Environment Research Division, National Institute of Fisheries Science)
• 박세진(국립수산과학원 어장환경과) | Se-jin Park (Marine Environment Research Division, National Institute of Fisheries Science)
• 김형철(국립수산과학원 어장환경과) | Hyung Chul Kim (Marine Environment Research Division, National Institute of Fisheries Science)
• 윤상필(국립수산과학원 어장환경과) | Sang-Pil Yoon (Marine Environment Research Division, National Institute of Fisheries Science) Corresponding Author