Devastating toll of South Korean oil spill

SEOUL (AFP) -
South Korea's worst oil spill has devastated marine life, halving the number of sea plants and mollusks found off the western coast, a government report said Thursday.

The oil leak also threatened the underwater food chain, endangering fish and sea birds, the Environment Ministry report said.

Surveys following the spill last December showed mollusk populations had plunged to 56 creatures of five species per square metre from 133 creatures of eight species as mussels were found to have been considerably contaminated by remnants of crude oil.

The density of seaweeds per square metre fell 43 percent from February 2007 and phyllospadix iwatensis, a seagrass, also declined 47 percent.

"Because seagrasses and seaweeds make up the lowest part of the ocean food chain, there are risks of second-hand contamination of fish and birds that are at the top of the food pyramid," the report said.

The surveys, the first since the oil spill, were carried out in order to set up plans to restore damaged beaches and sea farms.

Hong Kong-registered supertanker Hebei Spirit spilled 10,900 tons of crude after it was rammed by a Samsung Heavy Industries barge in rough seas off Taean county on December 7.

Scores of marine farms and kilometres (miles) of beaches were devastated and three people in Taean, about 110 kilometres (70 miles) southwest of Seoul, killed themselves in frustration over delays in compensation.