Marine fronts at the continental shelves of austral South America: Physical and ecological processes

作者: Eduardo M Acha , Hermes W Mianzan , Raúl A Guerrero , Marco Favero , José Bava

DOI: 10.1016/J.JMARSYS.2003.09.005

关键词:

摘要: Abstract Neritic fronts are very abundant in austral South America, covering several scales of space and time. However, this region is poorly studied from a systemic point view. Our main goal to develop holistic view physical ecological patterns processes at regarding frontal arrangements. Satellite information (sea surface temperature chlorophyll concentration), historical hydrographic data were employed show fronts. We compiled all existing evidence (physical biological) about identify regions defined by similar types coastal characterize them. Fronts America can be arranged six zones according their location, forcing, key variables, seasonality, enrichment mechanisms. Four zones, the Atlantic upwelling zone; temperate estuarine Patagonian tidal zone Argentine shelf-break zone, occupy most side. The Chile–Peru on Pacific, largest best-known region. cold encompasses tip connecting Pacific oceans, remains studied. When observed continental scale, coast dominated two large appears simplest than terms richness. extension shelf allows for development great diversity mesoscale Though we extensive areas shelves, inside comparatively small areas. Even so, they play paramount role processes, allowing high biological production; offering feeding and/or reproductive habitats fishes, squids, birds; acting as retention larvae benthic species; promoting establishment invertebrates that benefit organic production area.

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