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Modelling the impact of aquaculture on early diagenetic processes in sea loch sediments

2009; Inter-Research; Volume: 388; Linguagem: Inglês

10.3354/meps08072

1616-1599

Daniele Brigolin, Roberto Pastres, TD Nickell, CJ Cromey, DR Aguilera, Pierre Regnier,

Marine and coastal ecosystems

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 388:63-80 (2009) - DOI: https://doi.org/10.3354/meps08072 Modelling the impact of aquaculture on early diagenetic processes in sea loch sediments Daniele Brigolin1,*, Roberto Pastres1, Thomas D. Nickell2, Chris J. Cromey2, David R. Aguilera3,4, Pierre Regnier4,5 1Department of Physical-Chemistry, University of Venice, Calle Larga S.Marta 2137, 30123 Venice, Italy 2Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, Argyll PA37 1QA, UK 3DELTARES–TNO Built Environment and Geosciences, Dept. Groundwater quality, Princetonlaan 6, 3508 TA Utrecht, The Netherlands 4Department of Earth Sciences, Utrecht University, PO Box 80.021, 3508 TA Utrecht, The Netherlands 5Department of Earth and Environmental Sciences, CP 160/02, Université Libre de Bruxelles, 50 Av. F. D. Roosevelt, 1050 Brussels, Belgium *Email: brigo@unive.it ABSTRACT: We present a novel approach for the simulation of the impacts of finfish aquaculture on sedimentary redox dynamics, based on the coupling of a fish farm waste deposition model (DEPOMOD) and a knowledge-based reactive transport model (RTM) of early diagenesis. The integrated model was applied to a salmon fish farm located in a Scottish fjordic sealoch. The major diagenetic processes of the reaction network were first identified on the basis of literature information and historic data. Next, the organic carbon (OC) flux at a pristine site near the farm was estimated by fitting the vertical profiles of pore water and solid-state chemical species measured in the field. DEPOMOD was then used to predict the fluxes of OC due to the release of uneaten feed and faeces at various distances away from the farm. These fluxes were added to the background ‘natural’ fluxes and used as forcing functions for the RTM. Comparison of the simulated transient profiles with data collected at an impacted site revealed that the RTM model satisfactorily predicted the transient dynamics of the system. We discuss the use of the model for cost-effective environmental impact assessments, site selection and the optimization of husbandry practices. KEY WORDS: RTM · DEPOMOD · Transient simulation · Loch Creran · Atlantic salmon · Benthic mineralization Full text in pdf format PreviousNextCite this article as: Brigolin D, Pastres R, Nickell TD, Cromey CJ, Aguilera DR, Regnier P (2009) Modelling the impact of aquaculture on early diagenetic processes in sea loch sediments. Mar Ecol Prog Ser 388:63-80. https://doi.org/10.3354/meps08072 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 388. Online publication date: August 19, 2009 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2009 Inter-Research.