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• W2038272470 abstract "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 347:247-259 (2007) - DOI: https://doi.org/10.3354/meps06982 Assessment of an environmental barrier to transport of ichthyoplankton from the southern to the northern Benguela ecosystems Christophe Lett1,*, Jennifer Veitch2, Carl D. van der Lingen3, Larry Hutchings3 1IRD, UR ECO-UP, 2Oceanography Department, University of Cape Town, Rondebosch 7701, South Africa 3Marine and Coastal Management, Private Bag X2, Rogge Bay 8012, South Africa *Email: Christophe.Lett@ird.fr ABSTRACT: The Lüderitz upwelling cell and Orange River cone (LUCORC) area, a transboundary region between South Africa and Namibia, is considered to be an environmental barrier to transport of ichthyoplankton from the southern to the northern Benguela upwelling ecosystems. We use environmental data and modelling to assess the potential mechanisms responsible for this barrier: environmental data were extracted from the 1 × 1° World Ocean Atlas 2001 database and used to build maps of annual mean salinity, temperature, chlorophyll, dissolved oxygen and nutrient concentrations; outputs of a regional circulation model were used in an individual-based model to assess the transport of passive particles from the southern to the northern Benguela. The data show no clear environmental barrier at sea surface, but the model results suggest that particles released there would be largely transported offshore. The model also shows that particles released below the surface could be transported alongshore from the southern to the northern Benguela, but low subsurface temperatures would increase ichthyoplankton mortality and hence be a strong limiting factor to northward transport. We conclude that the combination of a surface hydrodynamic and a subsurface thermal barrier could limit the possibility for ichthyoplankton of epipelagic species to be transported from the southern to the northern Benguela, but that ichthyoplankton of mesopelagic species, having a wider tolerance to low temperatures, would be less affected. KEY WORDS: Environmental barrier · Ichthyoplankton · Benguela · Lüderitz upwelling cell · Orange River cone · Physical–biological interactions · Individual-based model · World Ocean Atlas Full text in pdf format PreviousNextCite this article as: Lett C, Veitch J, der Lingen CDv, Hutchings L (2007) Assessment of an environmental barrier to transport of ichthyoplankton from the southern to the northern Benguela ecosystems. Mar Ecol Prog Ser 347:247-259. https://doi.org/10.3354/meps06982 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 347. Online publication date: October 11, 2007 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2007 Inter-Research." @default.
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• W2038272470 title "Assessment of an environmental barrier to transport of ichthyoplankton from the southern to the northern Benguela ecosystems" @default.
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