Patagonian Region

Patagonian Region

 

a zoogeographical region of the ocean; sometimes considered a subregion of the Notalian region. The Patagonian region comprises the shelf and continental slope of the southern tip of South America and the adjacent islands. It is influenced by powerful cold currents, including the Peru (Humboldt) Current, the Cape Horn Current, and the Falkland Current. The surface temperature of the water in summer in the southern hemisphere is 8°-17°C, and in winter, 4°-13°C. The region’s biological productivity is high, with plentiful plankton and benthos, but the variety of species is significantly less than in the tropics. More than one-half of the species are endemic. The region has many species in common with the Antarctic region and somewhat fewer in common with the Kerguelen region.

The fauna of the Patagonian region is centered in the waters of Tierra del Fuego, in the Strait of Magellan, and in the waters off the southern tip of Chile. The fauna of the Chilean section, where the coast is precipitous and rocky, significantly differs from the fauna of the Argentinian section, which is a broad platform shelf. There are few species distributed throughout the entire Patagonian region. The benthos of the Patagonian region is dominated by large brown algae, mollusks, and echinoderms; there are few crabs or corals. Characteristic marine birds include albatrosses and king penguins. Marine mammals include southern fur seals (Arctocephalus australis), South American sea lions (Otaria byronia), and balaenids. Of commercial importance are the fishes hake, blue whiting Micromesistius australis, congrio, and sprat Sprattus fuegensis and such invertebrates as the stone crab Lithodes antarcticus, shrimp, the crab Munida gregaria, Argentinian squid (Illex argentinus), gastropods, bivalves, and sea urchins.

K. N. NESIS

References in periodicals archive ?
El Calafate, in the Patagonian region of Argentina, is in one of a few places on earth where a combination of mountain winds and the polar vortex create the worlds highest stratospheric mountain waves rising air currents that Perlan pilots believe can eventually carry their experimental aircraft to the edge of space.
I would like to visit the Parque Provincial El Tromen in Argentina because it has been a dream of mine to visit the Andean mountains and the Patagonian region of South America where I can have an aerial view of the wetlands and lakes of the region.
In order to ascertain the timing of when it drained, Glasser and colleagues dated sediment samples left by the ancient lake, which was located in the Patagonian region on what is now the border of Argentina and Chile.
villosus from most of the Patagonian region and, more in general, the absence of armadillos south of Santa Cruz River, can be linked with the glacial history of the region during the Plio-Pleistocene (Rabassa, 2008; Rabassa et al.
This study wants to determine the degree of knowledge about basic aspects of medical hydrology among the health personnel who worked or keep working in the patagonian region of Argentina.
On June 20, a Chilean court ordered the government to suspend plans for a $3 billion project to build five dams on two rivers in the rugged Patagonian region in the south of the country.
Summary: An Argentine commercial plane has crashed in the country's remote Patagonian region, killing all 22 people on board.
This genus has a wide distribution in the Andean Patagonian region with representatives in the Holarctic region and an undescribed species of the araucanus group in the higher elevations of Costa Rica.
Mr Lawlor, 28, from Durrow, Co Laois, was last seen on November 18 travelling by bus to the park in the Patagonian region.
Coria, Patagonian Mesozoic Reptiles is an amazing scientific text revealing the latest findings concerning dinosaurs that lived in the Patagonian region during the Mesozoic era.
The adventure begins in the rural town of El Calafate, where palatial glaciers and icebergs in Argentina's Patagonian region rise to unimaginable heights and glisten like blue diamonds.
The Pietra Patagonica series is nature-inspired, modeled after the Patagonian region of Argentina.