Construction of Shihwa Dike Leads to Severe Deterioration of Benthic Environments
The researchers studied changes in polychaete worms in Lake Shihwa over time. They collected samples at different times and found that the number of species decreased, with some species dominating the area. These dominant species are known to tolerate pollution. The diversity of species decreased, and an area without life expanded, showing that the lake's environment worsened after the construction of the dike.