| Description: |
In this study researchers utilized plant pigments, lignin-phenols, stable isotopes and foraminiferal microfossils in sediment cores to examine the history of hypoxia in the Changjiang (Yangtze) large river delta-front estuary. Microfossil data indicated an increasing trend in hypoxia in the Changjiang Estuary. Pigment biomarkers showed an increase in the phytoplankton abundance. Lignin-phenol changes were mainly due to land-use changes and dam constructions. [Source: Journal of Marine Systems]
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