Cooper S R, Brush G S
Science. 1991 Nov 15;254(5034):992-6. doi: 10.1126/science.254.5034.992.
Stratigraphic records from four sediment cores collected along a transect across the Chesapeake Bay near the mouth of the Choptank River were used to reconstruct a 2000-year history of anoxia and eutrophication in the Chesapeake Bay. Variations in pollen, diatoms, concentration of organic carbon, nitrogen, sulfur, acid-soluble iron, and an estimate of the degree of pyritization of iron indicate that sedimentation rates, anoxic conditions and eutrophication have increased in the Chesapeake Bay since the time of European settlement.
沿着乔普坦克河河口附近切萨皮克湾的一条横断面采集的四个沉积物岩芯的地层记录，被用于重建切萨皮克湾2000年的缺氧和富营养化历史。花粉、硅藻、有机碳、氮、硫、酸溶性铁的浓度变化以及铁的黄铁矿化程度估计表明，自欧洲人定居以来，切萨皮克湾的沉积速率、缺氧状况和富营养化程度都有所增加。
