The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Characteristics of Molluscan Community Structure and Relationship between the Structure and Environmental Variables in Abyssal Plain of the East Sea

동해 심해저 연체동물 군집구조 특성 및 군집구조와 환경요인과의 상관성

  • Son, Min Ho (Marine Eco-technology Institute) ;
  • Jung, Jik Young (Marine Eco-technology Institute) ;
  • Kim, Chang Joon (Marine Chemistry and Geochemistry Research Center, Korea Institute of Ocean Science and Technology) ;
  • Choi, Ki Young (Marine Chemistry and Geochemistry Research Center, Korea Institute of Ocean Science and Technology)
  • 손민호 (해양생태기술연구소) ;
  • 정직영 (해양생태기술연구소) ;
  • 김창준 (한국해양과학기술원 해양화학-지화학연구센터) ;
  • 최기영 (한국해양과학기술원 해양화학-지화학연구센터)
  • Received : 2016.12.05
  • Accepted : 2016.12.30
  • Published : 2016.12.31
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Abstract

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.

Keywords

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