This study was carried out to investigate temporal and spatial distribution of macrobenthic community and elucidate effects of
environmental factors on change of community structure in an intertidal flat, Hakseong-ri, Boryeong, Korea. Field surveys were
seasonally conducted to collect samples of sediment and macrobenthos using can core in triplicate at nine stations in 2016 and 2017.
Our results showed that sediment had high mud content (above 60%) in most samples and mean content of loss on ignition was 2.3% in
2016. A total of 79 species was collected in the study site during the study period. Mean density and biomass were 611 ind./m2
and 64.1
gWWt/m2
, respectively. Heteromastus filiformis was the dominant species (48.6%, 297 ind./m2
) followed by Macrophthalmus
japonicus (10.1%, 62 ind./m2
) and Upogebia major (6.9%, 42 ind./m2
). Three assembly groups resulted from cluster analysis were
more distinguished by interaction between organisms and frequency of dominant species than by physical and chemical environment
characteristics. In addition, macrobenthic community in the Hakseong intertidal flat showed seasonal changes based on non metric
multidimensional scaling using species abundance