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Science 21 June 1985:
Vol. 228. no. 4706, pp. 1424 - 1427
DOI: 10.1126/science.228.4706.1424
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Articles

Mechanisms Controlling Phosphorus Retention Capacity in Freshwater Wetlands

CURTIS J. RICHARDSON 1

1 School of Forestry and Environmental Studies, Duke University, Durham, North Carolina 27706

Freshwater wetland ecosystems do not effectively conserve phosphorus in the way that terrestrial ecosystems do. The phosphorus retention capacity varies greatly among bogs, fens, and swamps and is concomitant with the amorphous acid oxalate-extractable aluminum and iron content in the soil. However, the phosphorus adsorption potential in wetland ecosystems may be predicted solely from the extractable aluminum content of the soil. Wetlands tested as wastewater filtration systems became phosphorus-saturated in a few years, with the export of excessive quantities of phosphate.

Submitted on September 7, 1984
Accepted on January 30, 1985


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