동해 후포주변 사질조하대에 서식하는 대형저서동물 군집의 분포 특성

• Published in: Ocean and polar research pp. 123 - 134
• Main Authors: 백상규, 강래선, 전재옥, 이재학, 윤성규
• Format: Journal Article
• Language: Korean
• Published: 한국해양과학기술원 01.06.2007
• Subjects: 해양학
• ISSN: 1598-141X; 2234-7313

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 m2) 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./m2, and mean biomass was 82.5 wet-weight g/m2. The major individual-dominant species were three polychaetes Spiophanes bombyx (436 ind./m2), Scoletoma longifolia (250 ind./m2) and Magelona japonica (170 ind./m2), and bivalve Adontorhina subquadrata (73 ind./m2). 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. KCI Citation Count: 22