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http://dx.doi.org/10.4217/OPR.2019.41.2.047

Species Composition and Community Structure of Macrobenthos during Fall on the Dokdo Coast, Korea  

Kang, Su Min (Department of Convergence Study on the Ocean Science and Technology Ocean Science and Technology School, Korea Maritime and Ocean University)
Lee, Hyung-Gon (Marine Ecosystem and Biological Research Center, KIOST)
Kim, Sang Lyeol (Department of Convergence Study on the Ocean Science and Technology Ocean Science and Technology School, Korea Maritime and Ocean University)
Choi, Jin-Woo (South Sea Research Institute, KIOST)
Park, Chan Hong (East Sea Research Institute, KIOST)
Yu, Ok Hwan (Department of Convergence Study on the Ocean Science and Technology Ocean Science and Technology School, Korea Maritime and Ocean University)
Publication Information
Ocean and Polar Research / v.41, no.2, 2019 , pp. 47-61 More about this Journal
Abstract
The Dokdo coast is known for its high biodiversity. However, few studies have examined the biodiversity and macrobenthic community on the subtidal soft-bottom. Therefore, we collected macrobenthos (> 1 mm) using a Smith-McIntyre grab ($0.1m^2$) at 15 stations along the Dokdo coast in September 2016. The sediments consisted of badly sorted (1.7) coarse sand with gravel and the mean sediment grain size was $-0.4{\phi}$. In total, 177 macrobenthic species were collected; their mean density was $1,566ind./m^2$. The number of species and density of macrobenthic fauna decreased significantly with the mean grain size. The dominant species were the amphipods Melita denticulata (16.5%) and Melita shimizui (5.5%), polychaete Salvatoria clavata (5.4%), bivalve Glycymeris aspersa (4.4%), and ophiuroid Ophionereis dubia (4.3%). The dominant macrobenthos species on the subtidal soft-bottom differed from the coastal areas of the East Sea, suggesting that the difference in the sediment grain size affected the macrobenthos. Cluster analysis was performed to divide the study area into four groups, and environmental factors which correlated with species composition and distribution in the study area were the combination of the four parameters of salinity, dissolved oxygen, total organic carbon and depth. A future seasonal investigation is needed to understand the species composition and characteristics of the Dokdo macrobenthos.
Keywords
East sea; Dokdo; subtidal; benthic community; macrobenthos;
Citations & Related Records
Times Cited By KSCI : 12  (Citation Analysis)
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