Short-term changes of community structure of microbenthic invertebrates in the coastal waters Jeju Island, Korea from 2013 to 2015
Jun-Cheol Ko, Bo-Yeon Kim, Myoung-Ho Sonh, Woon-Chan Jo and Kwan-Cheol Lee
Jeju Fisheries Research Institute, NFIS, Jeju-do, 63068, Korea CHALLENGER.Co.,Ltd, Jeju-city, 63072, Korea GAULPADO, Jeju-city, 63070, Korea
This study was performed to know and compare the community structures of macrobenthic invertebrates of five fishing grounds in the coastal waters of Jeju Island from 2013 to 2015. A total of 629 species was identified. Molluscans comprised 282 species (44.8%), Arthropods 88 (14.0%), Poriferans 61 (9.7%), Bryozoans 52 (8.3%) and the others including Cnidarians 51 (8.1%). Density and biomass were estimated to be 71,007 ind./m2 and 599,208.0 gwwt/m2, respectively. Gastropods was the most dominant taxon in terms of abundance (24,625 ind./m2) and number of species as well, and Gastropods was predominant in biomass (190,789.0 gwwt/m2). The dominant species were Omphalius pfeifferi, Astralium haematragum, Musculus viridulus, Halosydna brevisetosa, Phascolosoma scolops, Herdmania monus in 5-20 m. Based on the cluster analysis, the study area could be divided into five station groups. The biodiversity, evenness and richness index appeared as follows: H' = 4.28-4.64, E' = 0.74-0.79, R = 33.17-35.45. The dominance index were highest in Sagye and lowest in Sinhung.
  
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