A model of sediment transport under the influence of surface bioturbation: generalisation to the facultative suspension-feeder Scrobicularia planaстатья из журнала
Аннотация: 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 286:43-56 (2005) - doi:10.3354/meps286043 A model of sediment transport under the influence of surface bioturbation: generalisation to the facultative suspension-feeder Scrobicularia plana Francis Orvain* CREMA (CNRS-IFREMER UMR 10), Centre de Recherche sur les Ecosystèmes Marins et Aquacoles de L'Houmeau, Place du séminaire, BP 5, 17137 L'Houmeau, FrancePresent address: LBBM, Laboratoire de Biologie et Biotechnologie Marine, Université de Caen, Esplanade de la paix, BP 5186, 14032 Caen cedex, France *Email: f.orvain@iutcaen.unicaen.fr ABSTRACT: Flume experiments were designed to study how sediment erodibility was modified by the facultative suspension-feeder Scrobicularia plana living at different densities in sediment beds of various degrees of compaction. Two separate erosion phases were identified from the resuspension kinetics: (1) erosion of an unconsolidated surficial layer (i.e. fluff layer) and (2) the subsequent bed erosion. S. plana were found to influence both erosion phases: (1) erosion rates of the fluff layer were controlled by bioturbation activities, the extents of which were influenced by bivalve density and the degree of compaction of the sediments, and (2) critical thresholds of the subsequent bed erosion decreased as clam density increased, likely due to depressions in the sediment bed that were created by siphon activity. A 1-dimensional vertical model was modified to incorporate the effects of S. plana on fluff layer formation through pseudofaeces production. The modifications to the model and results are compared to a similar approach for Hydrobia ulvae published earlier, and are discussed with respect to the definition of functional groups of bioturbators in sediment transport models. By discussing effects of spatial grouping and analogies to other organisms, this study shows how the influence of one species on sediment resuspension may be generalised and used for model descriptions of other species of the same behavioural type. Model developments on pseudofaeces production show that there are asymmetric effects generated over time and by bivalve density for S. plana, which do not occur for H. ulvae. KEY WORDS: Intertidal mudflat · Scrobicularia plana · Bioturbation · Sediment transport · Functional groups · Model · Resuspension Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 286. Online publication date: February 02, 2005 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2005 Inter-Research.
Год издания: 2005
Авторы: Francis Orvain
Издательство: Inter-Research
Источник: Marine Ecology Progress Series
Ключевые слова: Coastal wetland ecosystem dynamics, Coastal and Marine Dynamics, Marine and coastal ecosystems
Другие ссылки: Marine Ecology Progress Series (PDF)
Marine Ecology Progress Series (HTML)
Institutional Archive of Ifremer (French Research Institute for Exploitation of the Sea) (HTML)
Marine Ecology Progress Series (HTML)
Institutional Archive of Ifremer (French Research Institute for Exploitation of the Sea) (HTML)
Открытый доступ: bronze
Том: 286
Страницы: 43–56