Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Distribution Patterns of Sandy Bottom Macrobenthic Community on the Hupo Coastal Area, in the East Sea of Korea

동해 후포주변 사질조하대에 서식하는 대형저서동물군집의 분포특성

  • Paik, Sang-Gyu (Marine Resources Research Department, KORDI) ;
  • Kang, Rae-Seon (Marine Resources Research Department, KORDI) ;
  • Jeon, Jae-Ok (Department of Biology Education, College of Education Daegu University) ;
  • Lee, Jae-Hac (Marine Resources Research Department, KORDI) ;
  • Yun, Sung-Gyu (Department of Biology Education, College of Education Daegu University)
  • 백상규 (한국해양연구원 해양자원연구본부) ;
  • 강래선 (한국해양연구원 해양자원연구본부) ;
  • 전재옥 (대구대학교 생물교육학과) ;
  • 이재학 (한국해양연구원 해양자원연구본부) ;
  • 윤성규 (대구대학교 생물교육학과)
  • Published : 2007.06.30
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Abstract

Distribution patterns of sandy bottom macrobenthic communities were studied around the Hupo coastal area. The seasonal surveys were conducted at 15 chosen sites within a depth range of 10 to 50 m along 10 km of the coastline using a Smith-McIntyre grab $(0.05\;m^2)$ in 2005. Overall depth distribution following the direction of the offshore become deeper parallel to the coastline. A total of 319 macrobenthic species were sampled with a mean density of $1,972\;ind./m^2$, and mean biomass was 82.5 wet-weight $g/m^2$. The major individual-dominant species were three polychaetes Spiophanes bombyx ($436\;ind./m^2$), Scoletoma longifolia ($250\;ind./m^2$) and Magelona japonica ($170\;ind./m^2$), and bivalve Adontorhina subquadrata ($73\;ind./m^2$). Cluster analysis and non-metric multidimensional scaling (nMDS) analysis based on Bray-Curtis similarity identified 2 major station groups which corresponded to macrobenthic faunal assemblages and their characteristic species. In addition, environmental conditions were significantly different between station groups. Group I contained mostly 20 and 50 m deep sites and was associated with sandy mud. Group I was characterized by high abundance of S. bombyx, S. longifolia, A. subquadrata. It was divided into two sub-groups (I-I and I-II) in relation to depth. Sub-group I-I was associated with deeper sites than sub-group I-II. Group II included mostly inshore area shallower than 15 m and was associated with coarse and medium sand. Group II was characterized by Lumbrinerides hayashii and Urothoe grimaldii japonica.

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References

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