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http://dx.doi.org/10.7850/jkso.2022.27.2.087

Spatial Distribution of Macrozoobenthic Organisms along the Korean Coasts in Summer Season  

LEE, JUNG-HO (Department of Marine Biotechnology, Anyang University)
LIM, HYUN-SIG (Department of Marine and Fisheries Sciences, Mokpo National University)
SHIN, HYUN CHOOL (Department of Ocean Integrated Science, Chonnam National University)
RYU, JONGSEONG (Department of Marine Biotechnology, Anyang University)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.27, no.2, 2022 , pp. 87-102 More about this Journal
Abstract
To clarify the spatial distribution pattern of macrozoobenthos in Korean coastal waters in the summer season and investigate the relationship between community structure and benthic environmental factors, field surveys on community structure and benthic environmental factors were conducted at 117 stations in August 2017. A total of 613 macrobenthic species were identified, with the mean density of 1,228 ind./m2 and the mean biomass (wet weight) of 110.9 g WW/m2. Rich biodiversity was found at stations near Wando and along the coast of the East Sea, and there is a trend that stations with greater biodiversity also showed higher mean density as well. The dominant species in all the coastal areas in Korea was Heteromastus filiformis, which were found at most of the stations during the survey. The relatively deep areas in the East Sea were dominated by Magelona johnsoni and Maldane cristata, which were the third and ninth dominant species in the study areas, respectively. Pseudopolydora kempi and Rhynchospio sp. were observed only at the station located in the Nakdong River estuary. From the cluster analysis the stations could be clustered into three station groups with more similar faunal composition. Group A was located in the eastern coast, characterized with deep water depth and low levels of sand contents, while Group B was located in the southern coast, characterized by shallow depth of water and high content of mud and organic matter. Lastly, Group C was in the western coast, demonstrating low levels of mud content and organic matters. The biodiversity of macrobenthic species in the study area showed high positive correlation coefficients with benthic environmental factors such as sorting, clay, silt, and contents of organic matter in sediments, but negatively correlated with the sand contents. Major dominant species, Theora lata and Eriopisella sechellensis, both showed negative correlation coefficients with the sand contents, but a relatively high positive correlation with the levels of organic contents.It can be concluded that the spatial distribution patterns of macrobenthic organisms in Korean coastal waters are affected by depth, sediment type, and contents of organic matters.
Keywords
Korea; Coastal area; Macrobenthos; Distribution; Depht; Sediment grain size; Organic content;
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