Researchers from SWIMS (Yuanyuan Hong and Mariaki Yusuhara) and collaborators used tens of thousands of small fossil shells preserved in sediment on the seafloor to reconstruct Hong Kong's marine ecosystem over the last ~50 - 100 years. They found that changes in freshwater and sediment discharge from the Pearl River due to monsoon rains and dams produced a strong west-east gradient in the turnover of rare species. Pollution from metals resulted in the turnover of abundant and dominant species in the central part of Hong Kong.
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