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울진 주변 해역 대형저서동물 군집의 시·공간 분포와 환경요인과의 관계

Spatiotemporal Distribution of Macrobenthic Communities in the Coastal Area of Uljin and Its Relation to Environmental Variables

유옥환|백상규|이형곤|이재학
한국해양과학기술원 (Korea Institute of Ocean Science & Technology)|2011.12|Ocean and Polar Research|제33권 제4호|pp. 421-434

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키워드

communityUljinEast seamacrobenthosthermal effluent
주제분류해양학

초록

Although thermal effluent from coastal power plants affects marine ecosystems, few studies have examined the spatiotemporal distribution of macrobenthic communities in a coastal area of Korea with thermal discharge. This study analyzed the species composition and abundance of a macrobenthic community in relation to environmental variables for a period of 1 year. In total 334 macrobenthic faunal species were collected; the mean density was 3,221 ind/m2. The number of species and the density of macrobenthic fauna increased with distance from the thermal discharge site. Cluster analysis indicated that the macrobenthic community could be divided into two groups: group I in shallow (< 30 m deep) and group II in the outer areas (> 30 m deep). Group I showed the lowest species density and diversity. Four polychaetes, including Magelona japonica, Spiophanes bombyx, Scolotoma longifolia and Chaetozone setosa, all of which have been dominant species since 1987, exhibited higher mean densities in the area distant from the thermal discharge (the outer and north areas). Conversely, the warm-adapted and opportunistic species, such as the amphipods Urothoe convexa and Mandibulophoxus mai, the bivalve Felaniella sowerbyi, and the polychaete Rhynchospio sp., were more abundant in the thermal discharge region. The results of this study indicate that thermal effluent influences macrobenthic communities in the shallow area, while other environmental variables, such as depth, sediment grain size, and TOC, are more important determinants of the macrobenthic communities in deeper regions (> 30 m deep).

Abstract

Although thermal effluent from coastal power plants affects marine ecosystems, few studies have examined the spatiotemporal distribution of macrobenthic communities in a coastal area of Korea with thermal discharge. This study analyzed the species composition and abundance of a macrobenthic community in relation to environmental variables for a period of 1 year. In total 334 macrobenthic faunal species were collected; the mean density was 3,221 ind/m2. The number of species and the density of macrobenthic fauna increased with distance from the thermal discharge site. Cluster analysis indicated that the macrobenthic community could be divided into two groups: group I in shallow (< 30 m deep) and group II in the outer areas (> 30 m deep). Group I showed the lowest species density and diversity. Four polychaetes, including Magelona japonica, Spiophanes bombyx, Scolotoma longifolia and Chaetozone setosa, all of which have been dominant species since 1987, exhibited higher mean densities in the area distant from the thermal discharge (the outer and north areas). Conversely, the warm-adapted and opportunistic species, such as the amphipods Urothoe convexa and Mandibulophoxus mai, the bivalve Felaniella sowerbyi, and the polychaete Rhynchospio sp., were more abundant in the thermal discharge region. The results of this study indicate that thermal effluent influences macrobenthic communities in the shallow area, while other environmental variables, such as depth, sediment grain size, and TOC, are more important determinants of the macrobenthic communities in deeper regions (> 30 m deep).

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동해 울진 원전 온배수배출구 주변 해역에서의 대형저서동물 군집구조권순현, 유옥환, 이형곤한국해양과학기술원 · Ocean and Polar Research2017 · 제39권 제2호원자력 발전소의 온배수 배출량 변화에 따른 대형저서동물 군집의 공간 변화김경태, 명철수, 문형태, 변주영, 유옥환, 이재학, 이형곤한국해양과학기술원 · Ocean and Polar Research2013 · 제35권 제4호울진 바다목장 주변해역 연성기질 조하대에 서식하는 대형저서동물의 군집구조김미향, 나종헌, 서인수, 오철웅, 이한나, 최병미, 최창근, 황강석한국환경생물학회 · 환경생물2014 · 제32권 제4호울산 연안 해역 저서다모류 군집의 시·공간 변동 및 저서건강도 평가신현출, 정봉근한국해양과학기술원 · Ocean and Polar Research2018 · 제40권 제4호진해만 특별관리해역의 대형저서동물의 시공간 분포서진영, 임현식, 최진우한국해양과학기술원 · Ocean and Polar Research2015 · 제37권 제4호복잡한 해안선 구조를 가진 통영 해역에서 조하대 저서생물 군집의 공간특성 비교강래선, 윤건탁, 정윤환한국해양과학기술원 · Ocean and Polar Research2010 · 제32권 제2호

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