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dc.contributor.authorKinsman-Costello, Lauren E
dc.contributor.authorHamilton, Stephen K
dc.contributor.authorO'Brien, Jonathan M
dc.contributor.authorLennon, Jay T
dc.description.abstractPhosphorus (P) retention is an important ecosystem service provided by sediments and soils. However, when shallow aquatic sediments and poorly drained soils dry and re-flood, they can be a source, rather than a sink, of P. Using experimental drying and re-flooding in the laboratory, we assessed the resultant sediment–water P exchange in a biogeochemically diverse set of sediments from 16 sites in Michigan. The direction and magnitude of P exchange to pore waters and surface waters upon re-flooding varied among sediments. Different sediment properties were related to P release to pore water than to P release to overlying surface water, suggesting that different processes control two phases of sediment P release: mobilization from solid to dissolved forms in the sediment pore water; and movement of dissolved P from pore water into overlying surface water. We observed especially high P release in dried and re-flooded sediments with high amounts of loosely sorbed phosphate, suggesting that drained sediments with a legacy of high P loads will be most likely to release P and experience internal eutrophication when re-flooded. The differential responses of sediments suggest that aquatic ecosystem restoration and management for nutrient removal must be evaluated with site-specific knowledge of sediment and soil biogeochemistry.
dc.subject.fieldofresearchOther chemical sciences
dc.subject.keywordsScience & Technology
dc.subject.keywordsLife Sciences & Biomedicine
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsEnvironmental Sciences
dc.subject.keywordsGeosciences, Multidisciplinary
dc.titlePhosphorus release from the drying and reflooding of diverse shallow sediments
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationKinsman-Costello, LE; Hamilton, SK; O'Brien, JM; Lennon, JT, Phosphorus release from the drying and reflooding of diverse shallow sediments, Biogeochemistry, 2016, 130 (1-2), pp. 159-176
gro.hasfulltextNo Full Text
gro.griffith.authorHamilton, Stephen K.

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