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울진 바다목장 주변해역 연성기질 조하대에 서식하는 대형저서동물의 군집구조

Community Structure of Macrobenthic Assemblages near Uljin Marine Ranching Area, East Sea of Korea

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초록

In this study, we investigated the macrobenthic community structure and spatiotemporalvariations in Uljin Marine Ranching area, East Sea of Korea. Macrobenthos werecollected using a modified van Veen grab sampler from April to September 2013. Total number ofspecies sampled was 345 and mean density was 5,797 ind. m-2, both of which were dominated bythe polychaetes. The most dominant species were Spiophanes bombyx (53.64%), followed byMagelona sp.1 (6.96%), Cadella semitorta (2.73%), Lumbrineris longifolia (2.16%) and Alveniusojianus (2.08%). Cluster analysis and nMDS ordination analysis based on the Bray-Curtissimilarity identified 2 station groups. The group 1 (station 2, 3, 5, 6, 8 and 9) was characterized byhigh abundance of the polychaetes Magelona sp.1, Lumbrineris longifolia, Scoloplos armiger,Praxillella affinis, Maldane cristata and the bivalve Alvenius ojianus, with fine sediment above30m water depth. On the other hand, the group 2 (station 1, 4, 7 and 10) was numericallydominated by the polychaete Lumbrineriopsis sp. and the bivalve Cadella semitorta, with coarsesediment below 5m water depth. Collectively, the macrobenthic community structure showed adistinct spatial trend, which seemed to be related to the water depth and sediment composition.

Abstract

In this study, we investigated the macrobenthic community structure and spatiotemporalvariations in Uljin Marine Ranching area, East Sea of Korea. Macrobenthos werecollected using a modified van Veen grab sampler from April to September 2013. Total number ofspecies sampled was 345 and mean density was 5,797 ind. m-2, both of which were dominated bythe polychaetes. The most dominant species were Spiophanes bombyx (53.64%), followed byMagelona sp.1 (6.96%), Cadella semitorta (2.73%), Lumbrineris longifolia (2.16%) and Alveniusojianus (2.08%). Cluster analysis and nMDS ordination analysis based on the Bray-Curtissimilarity identified 2 station groups. The group 1 (station 2, 3, 5, 6, 8 and 9) was characterized byhigh abundance of the polychaetes Magelona sp.1, Lumbrineris longifolia, Scoloplos armiger,Praxillella affinis, Maldane cristata and the bivalve Alvenius ojianus, with fine sediment above30m water depth. On the other hand, the group 2 (station 1, 4, 7 and 10) was numericallydominated by the polychaete Lumbrineriopsis sp. and the bivalve Cadella semitorta, with coarsesediment below 5m water depth. Collectively, the macrobenthic community structure showed adistinct spatial trend, which seemed to be related to the water depth and sediment composition.

참고문헌 (30)

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