This study was aimed to classify the intertidal macrozoobenthic community status after
2 years of Sea Prince oil spill, and oil spill effects along oil spreading track from heavily impacted
to unaffected reference site. Field sampling was initiated in late February and continued
through November 1998 seasonally, after 2.5 years of oil spill. 7 rocky sampling sites were selected
among coastal regions coated and/or affected by the Sea Prince spilled oil.
Identified species was 158 species, 65 family, 24 order, 9 class, 5 phylum. Mollusca was the dominant
faunal group comprising 100 species (63.3%), and followed by 38 species of Crustacea
(24.1%), 12 species of Echinodermata (7.6%), 5 species of Porifera (3.2%), and 3 species of Cnidaria
(1.9%). On Dugpo of Sori Island, the fewest species was collected from 28 species to 35 species
seasonally among sampling stations. But far away Dugpo toward Gamak Bay, the number of
species increased, collecting the maximum on Sohwoenggan Island. At the wreck site of Sori Island,
especially the species number of attached animals such as poriferans and anthozoans was
very low compared to another site. The density and biomass on the higher tidal zone increased toward
the low affected sites, but biomass on middle tidal zone decreased. The invertebrate biomass
of study area was dependent on the sessile animals. The major dominamt species were small-sized
barnacles, Chthmallus challengeri, periwinkles, Littorina brevicula, mussels, Septifer virgatus, and
so on. The biomass of C. challengeri and L. brevicula on the higher tidal zone was highest in the
wreck site of Sori Island and decreased further and further. However, mussels on the middle tidal
zone showed the inverse trends because of the larger individual size of mussel inhabited in Sori
Island than those of another sites. As a result of community analysis, the effect of oil spill was not
found distinctly. Several ecological indices and cluster analysis did not show the meaningful varia-tion with oil track despite of the conspicuous differences among tidal heights. These indicate that
the macrozoobenthic community level of oil spreaded zone recovered in some degree after the Sea
Prince oil spill accident, but population or individual levels of dominant sessile animals took more
recovery times.
This study was aimed to classify the intertidal macrozoobenthic community status after
2 years of Sea Prince oil spill, and oil spill effects along oil spreading track from heavily impacted
to unaffected reference site. Field sampling was initiated in late February and continued
through November 1998 seasonally, after 2.5 years of oil spill. 7 rocky sampling sites were selected
among coastal regions coated and/or affected by the Sea Prince spilled oil.
Identified species was 158 species, 65 family, 24 order, 9 class, 5 phylum. Mollusca was the dominant
faunal group comprising 100 species (63.3%), and followed by 38 species of Crustacea
(24.1%), 12 species of Echinodermata (7.6%), 5 species of Porifera (3.2%), and 3 species of Cnidaria
(1.9%). On Dugpo of Sori Island, the fewest species was collected from 28 species to 35 species
seasonally among sampling stations. But far away Dugpo toward Gamak Bay, the number of
species increased, collecting the maximum on Sohwoenggan Island. At the wreck site of Sori Island,
especially the species number of attached animals such as poriferans and anthozoans was
very low compared to another site. The density and biomass on the higher tidal zone increased toward
the low affected sites, but biomass on middle tidal zone decreased. The invertebrate biomass
of study area was dependent on the sessile animals. The major dominamt species were small-sized
barnacles, Chthmallus challengeri, periwinkles, Littorina brevicula, mussels, Septifer virgatus, and
so on. The biomass of C. challengeri and L. brevicula on the higher tidal zone was highest in the
wreck site of Sori Island and decreased further and further. However, mussels on the middle tidal
zone showed the inverse trends because of the larger individual size of mussel inhabited in Sori
Island than those of another sites. As a result of community analysis, the effect of oil spill was not
found distinctly. Several ecological indices and cluster analysis did not show the meaningful varia-tion with oil track despite of the conspicuous differences among tidal heights. These indicate that
the macrozoobenthic community level of oil spreaded zone recovered in some degree after the Sea
Prince oil spill accident, but population or individual levels of dominant sessile animals took more
recovery times.