ISSN : 1225-3480
Study on characteristics of the molluscan community structure and relationship between the structure and environmental variables in the abyssal plain of the East Sea was carried out for 5 years, starting from 2009 until the end of 2015 except 2010 and 2011. The water depth at the study site is approximately 1,600 m at minimum, and maximum depth of 2,000 m and a total of 16 molluscan species including Aplacophora, Gastropoda and Bivalvia were observed. Species with the highest biomass was Thyasira tokunagai, followed by Yoldiella philippiana which were observed at 9 sampling stations every year. Among 4 sampling stations having various depths (1,600/ 1,700/ 1,800/ 2,000 m), the highest diversity for species was observed at water depths of 1,600 m and 1,700 m, but found the lowest at 1,800 m. Both abundance and biomass were found to be negative correlations with water depth (p < 0.05), however, showed a positive correlation with the concentrations of organic matters (p < 0.01, p < 0.05). However, it is interesting to note that both Thyasira tokunagai (biomass, 82.6%; abundance, 44.1%) and Yoldiella philippiana (biomass, 15.9%; abundance, 4.7%) did not show distinctive correlations with water depth as well as concentrations of organic matters (p > 0.05). Therefore, it could be concluded that community structure of both Thyasira tokunagai and Yoldiella philippiana did not appear to be affected by water depth and concentrations of organic matters but geographical characteristics.
Allen, J.A. (1998) The deep-water species of Dacrydium Torell, 1859 (Dacrydiinae: Mytilidae: Bivalvia) of the Atlantic. Malacologia, 1-2: 1-36.
Allen, J.A. and Morgan, R. (1981) The functional morphology of the families Cuspidariidae and Poromyidae (Mollusca: Bivalvia) of the abyssal Atlantic. Philosophical Transactions of the Royal Society of London, B291: 413-546.
Brandt, A., Elsner, N.O., Malyutina, M.V., Brenke, N., Golovan, O.A. and Lavrenteva, A.V. (2015) Abyssal macrofauna of the Kuril-Kamchatka Trench area (Northwest Pacific) collected by means of camera-epibenthic sledge. Deep-Sea Research II, 111:175-187.
Choi, J.W. (2015) Benthic Animals. In: Oceanography of the East Sea (Japan Sea) (ed. by Chang, K.I., Zhang, C.I., Park, C., Kang, D.J., Ju, S.J., Lee, S.H. and Wimbush, M.), pp. 347-372, Springer, New York.
Chung, C.S., Son, M.H., Kim, P.J., Kim, Y.I. and Choi, J.W. (2016) Establishment of Comprehensive Management System for Disposal of Waste Materials (XII). Ministry of Oceans and Fisheries, Sejong, 860 pp.
Gage, J.D. and Tyler, P.A. (1991) Deep-sea Biology: a Natural History of Organisms at the Deep-Sea Floor. 181 pp., Cambridge University Press, Cambridge.
Je, J.G., Yi, S.K. and Choi, J.W. (1988) Distribution pattern of benthic molluscs on the soft bottoms of the southeastern Yellow Sea. Ocean Research, 10:17-27.
Kamenev, G.M. (2013) Species composition and distribution of bivalves in bathyal and abyssal depths of the Sea of Japan. Deep-Sea Research II, 86-87: 124-139.
Khan, M.R. and Garwood, P.R. (1995) Effects of dumping sewage sludge on the infauna along a transect off the coast of Northumberland, England. Pakistan Journal of Zoology, 27: 229-232.
Kiyashko, S.I., Chernyaev, M.G. and Rodionov, I.A (1997) Mixotrophy in shallow-water bivalve molluscs with bacterial endosymbionts: data on stable carbon isotope ratios. Russian Journal of Aquatic Ecology, 6:53-57.
Knudsen, J. (1970) The systematics and biology of abyssal and hardal bivalvia. Galathea Report, 11:241.
Krylova, E.M. and Sahling, H. (2010) Vesicomyidae (Bivalvia): current taxonomy and distribution. PLoS ONES(4). doi:10.1371./journal.pone.0009957.
Olabarria, C. (2005) Patterns of bathymetric zonation of bivalves in the Porcupine Seabight and adjacent abyssal plain, NE Atlantic. Deep-Sea Research I, 52:15-31.
Rowe, G.T. (1983) Deep-sea Biology: The Sea, vol. 8 (ed. by Rowe, G.T.), 574 pp, Harvard University Press, Massachusetts.
Rozemarijn, K., Christoffer, S., Anders, K.J. and Endre, W. (2011) Ecology of twelve species of Thyasiridae (Mollusca: Bivalvia). Marine Pollution Bulletin, 62:786-791.
Sanders, H.L. (1958) Marine benthic diversity: a comparative study. American Naturalist, 162: 243-282.
Seo, I.S., Moon, H.T., Choi, B.M., Kim, M.H., Kim, D.I., Yun, J.S., Byun, J.Y., Choi, C.H. and Son, M.H.(2009) Community structure of macrobenthic assemblages around the Wolseong nuclear power plant, East Sea of Korea. Korean Journal of Environmental Biology, 27: 341-352.
Seo, J.Y., Lee, J.S. and Choi, J.W. (2013) Distribution patterns of opportunistic molluscan species in Korean waters. Korean Journal of Environmental Biology, 31: 1-9.
Tyler, P. (2002) Deep-sea eukaryote ecology of the semi-isolated basins off Japan. Journal of Oceanography, 58: 333-341.
Zenkevich, L.A. (1961) Certain quantitative characteristics of the pelagic and bottom life of the ocean. In:Oceanography (ed. by Sears, M.), pp. 323-335, Publication no. 67, AAAS, Washington DC.
