The east Brazil shelf is more diverse and productive towards the south due to a gradual increase in run-off and enlargement of the shelf at the Abrolhos bank, which forms a topographic barrier to the southwest flowing Brazil Current (BC).
The entire system is subject to a high physical energy regime and the outer premises of the shelf is governed by the northward flowing North Brazil Current (NBC) which may reach speeds of up to 75 cm.
The Brazil current, which corresponds to the western boundary current of the tropical/subtropical South Atlantic Gyre, was considered to have low productivity and a single Large Marine Ecosystem divided in geographical regions (Figure 5 and Table 1).
Although local spawning was also observed occuring off Brazil throughout the year, winter spawning was potentially linked to recruitment off the northern Patagonian shelf through paralarval transport by the Falkland (Malvinas)-- Brazil Current system (Haimovici et al.
argentinus paralarvae under the core of the Brazil Current (Haimovici et al.
Just don't get lost in the Brazil Current
along the way.
Abstract--The Abrolhos Bank region off the eastern coast of Brazil, under the influence of the Brazil Current, constitutes a typical tropical coral reef ecosystem that is characterized by a high diversity of tropical fish.
This region is characterized by the southward flowing Brazil Current (BC), a typical western boundary current regime (Castro and Miranda, 1998).
Major currents like the Gulf Stream, and eddies like the North Brazil Current
retroflection eddies (see Richardson's article), may penetrate the deep water and mix or disrupt the deep-current flow.
The northern region is highly influenced by the North Brazil Current
which carries the waters of the outer continental shelf and slope to the northwest (MMA, 2006).
In the equatorial region of the Atlantic, the North Brazil Current follows the Brazilian coast northwestward before turning sharply to the right between 5 [degrees] N and 10 [degrees] N to cross the Atlantic as the North Equatorial Countercurrent.
From July through December, however, all available surface drifters (during 1983 to 1985) in the North Brazil Current retroflected into the countercurrent.