Lagrangian pathways in the southern Benguela upwelling system

Contrasting wind patterns and toxigenic phytoplankton in the southern Benguela upwelling system

The southern Namaqua shelf of the Benguela upwelling system, downstream of the Cape Columbine upwelling cell, is frequently subjected to a variety of harmful algal bloom (HAB) phenomena. Here, winds dictate most physical processes that are important to the development of HABs. Toxic algal cell concentrations and distributions, in relation to their respective toxin content, are compared over 2 a...

An Ecosystem Framework for Fisheries Management in the Southern Benguela Upwelling System

casted the increasing need for fisheries managers to take species interactions into account. It is now widely recognized that ecosystem effects need to be considered in managing fisheries (Pauly 1998, Beamish and Mahnken 1999, Gislason et al. 2000). Steele (1996) concluded that a “regime shift in fisheries management” is required if one is to manage fisheries successfully in the context of ecos...

The Benguela upwelling ecosystem lies adjacent to the south-western coast of Africa, from southern Angola

south-western coast of Africa, from southern Angola (15°S) to Cape Agulhas (35°S; Fig. 1). Ecologically, it is split into separate northern and southern subsystems by a zone of intense perennial upwelling near Lüderitz (26–27.5°S; Shannon 1985). As is characteristic of upwelling ecosystems, the Benguela is highly productive and supports abundant populations of plankton-feeding clupeoids, includ...

SST subseasonal variability in the central Benguela upwelling system as inferred from satellite observations (1999-2009)

Spatio-temporal patterns of C : N : P ratios in the northern Benguela upwelling system

On a global scale the ratio of fixed nitrogen (N) and phosphate (P) is characterized by a deficit of N with regard to the classical Redfield ratio of N : P = 16 : 1 reflecting the impact of N loss occurring in the oceanic oxygen minimum zones. The northern Benguela upwelling system (NBUS) is known for losses of N and the accumulation of P in suband anoxic bottom waters and sediments of the Nami...