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Effects of Suburban Land Use on Phosphorus Fractions and Speciation in the Upper Peruque Creek, Eastern Missouri

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This field study was conducted to explore the spatial and seasonal changes in total phosphorus and fraction distribution in relation to land uses. Water samples were collected biweekly at four sampling locations, which represented different potential phosphorus sources along the Upper Peruque Creek in Eastern Missouri. Total phosphorus concentrations of >0.8 mg/L appeared sporadically at site 2, downstream of a small community, with an average of 0.82 ± 0.14 mg/L in fall. Particulate phosphorus accounted for approximately 80% of total phosphorus at all sampling sites, except for site 2, where approximately 50 to 75% of dissolved phosphorus was often observed. Approximately 71 and 85% of total phosphorus in the sediment was in the form of iron(III) phosphate at the headwaters and downstream sites, respectively; 29 and 15% was in the form of phytic acid at the two sites. Land uses affect the total phosphorus concentration and alternate phosphorus fraction and speciation in the creek.

Keywords: Missouri Upper Peruque Creek; X-ray absorption near-edge structure spectroscopy; fraction; land use; phosphorus; speciation

Document Type: Research Article


Publication date: 2008-04-01

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