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Science 15 November 1991:
Vol. 254. no. 5034, pp. 992 - 996
DOI: 10.1126/science.254.5034.992
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Articles
Long-Term History of Chesapeake Bay Anoxia
SHERRI R. COOPER 1 and
GRACE S. BRUSH 1
1 Department of Geography and Environmental Engineering, Johns Hopkins University, Baltimore, MD 21218
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.
Submitted on May 31, 1991
Accepted on August 21, 1991
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