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• W2339929072 abstract "AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections AEI 7:205-222 (2015) - DOI: https://doi.org/10.3354/aei00151 Modeling the impact of floating oyster (Crassostrea virginica) aquaculture on sediment-water nutrient and oxygen fluxes Jeremy M. Testa1,*, Damian C. Brady2, Jeffrey C. Cornwell3, Michael S. Owens3, Lawrence P. Sanford3, Carter R. Newell4, Steven E. Suttles3, Roger I. E. Newell3 1Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, PO Box 38, Solomons, MD 20688, USA 2School of Marine Sciences, University of Maine, 193 Clark Cove Road, Walpole, ME 04573, USA 3Horn Point Laboratory, University of Maryland Center for Environmental Science, 2020 Horns Point Road, Cambridge, MD 20613, USA 4Maine Shellfish R&D, 7 Creek Lane, Damariscotta, ME 04543, USA *Corresponding author: jtesta@umces.edu ABSTRACT: Bivalve aquaculture relies on naturally occurring phytoplankton, zooplankton, and detritus as food sources, thereby avoiding external nutrient inputs that are commonly associated with finfish aquaculture. High filtration rates and concentrated bivalve biomass within aquaculture operations, however, result in intense biodeposition of particulate organic matter (POM) on surrounding sediments, with potential adverse environmental impacts. Estimating the net depositional flux is difficult in shallow waters due to methodological constraints and dynamic processes such as resuspension and advection. In this study, we combined sediment trap deployments with simulations from a mechanistic sediment flux model to estimate seasonal POM deposition, resuspension, and processing within sediments in the vicinity of an eastern oyster Crassostrea virginica farm in the Choptank River, Maryland, USA. The model is the stand-alone version of a 2-layer sediment flux model currently implemented within larger models for understanding ecosystem responses to nutrient management. Modeled sediment-water fluxes were compared to observed denitrification rates and nitrite + nitrate (NO2-+NO3-), phosphate (PO43-) and dissolved O2 fluxes. Model-derived estimates of POM deposition, which represent POM incorporated and processed within the sediment, comprised a small fraction of the material collected in sediment traps. These results highlight the roles of biodeposit resuspension and transport in effectively removing oyster biodeposits away from this particular farm, resulting in a highly diminished local environmental impact. This study highlights the value of sediment models as a practical tool for computing integrated measures of nitrogen cycling as a function of seasonal dynamics in the vicinity of aquaculture operations. KEY WORDS: Biogeochemistry · Nutrient cycling · Oyster · Modeling · Sediments · Biodeposition Full text in pdf format PreviousNextCite this article as: Testa JM, Brady DC, Cornwell JC, Owens MS and others (2015) Modeling the impact of floating oyster (Crassostrea virginica) aquaculture on sediment-water nutrient and oxygen fluxes. Aquacult Environ Interact 7:205-222. https://doi.org/10.3354/aei00151 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AEI Vol. 7, No. 3. Online publication date: October 21, 2015 Print ISSN: 1869-215X; Online ISSN: 1869-7534 Copyright © 2015 Inter-Research." @default.
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• W2339929072 date "2015-10-21" @default.
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• W2339929072 title "Modeling the impact of floating oyster (Crassostrea virginica) aquaculture on sediment-water nutrient and oxygen fluxes" @default.
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