title: Effects of sediment disturbance caused by bridge construction on macrobenthic communities in Asan Bay, Korea.
abstract: Changes in soft-bottom macrobenthic communities and the effects of anthropogenic disturbances were studied. We compared biological and environmental samples during and after bridge construction (DBC and ABC). Significant differences were detected in sediment composition at three stations, although hydrographic conditions were similar for DBC and ABC samples. From DBC to ABC, the number of species and density of macrobenthic fauna tended to decrease, whereas biomass increased. Non-metric multidimensional scaling (MDS) analysis identified two sampling period groups from eight temporal samples, plus three station groups and one station from 12 spatial samples, which corresponded to macrobenthic faunal assemblages and theircharacteristic species. In addition, contributions of variables to similarity showed that the DBC and ABC samples differed significantly in the distribution of characteristic species and proportion of polychaete trophic groups, suggesting that the macrobenthic community structure was a factor affecting sediment disturbance caused by bridge construction.
authors.affiliation: Marine Ecosystem and Environment Research Division, Korea Ocean Research and Development Institute, Ansan P.O. Box 29, 425-600, Korea.
authors.forename: Sang Gyu
authors.initials: SG
authors.lastname: Paik
authors.forename: Sung Gyu
authors.initials: SG
authors.lastname: Yun
authors.forename: Heung Sik
authors.initials: HS
authors.lastname: Park
authors.forename: Jae Hac
authors.initials: JH
authors.lastname: Lee
authors.forename: Chae Woo
authors.initials: CW
authors.lastname: Ma
mesh_terms: D000818:Animals; D017753:Ecosystem; D004784:Environmental Monitoring; D005160:Facility Design and Construction; D005843:Geography; D019015:Geologic Sediments / Q000032:analysis* / Q000737:chemistry; D007220:Industrial Waste / Q000009:adverse effects*; D007448:Invertebrates / Q000145:classification / Q000187:drug effects* / Q000254:growth & development; D007723:Korea; D011157:Population Dynamics; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical