Global Ecological Consequences of the 1982-83 El Niño-Southern Oscillation

Global Ecological Consequences of the 1982-83 El Niño-Southern Oscillation

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El NiApo is a meteorologic/oceanographic phenomenon that occurs sporadically (every few years) at low latitudes. It is felt particularly strongly in the eastern Pacific region, notably from the equator southwards along the coasts of Ecuador and Peru. The El NiApo is a component of the ENSO (El NiApo Southern Oscillation) which accentuates the intimate and causal connection between atmospheric and marine processes. Obvious manifestations of El NiApo in the eastern Pacific are anomalous warming of the sea; reduced upwelling; a marked decline in fisheries, and high rainfall with frequent flooding. The 1982/83 El NiApo was exceptionally severe, and was probably the strongest warming of the equatorial Pacific Ocean to occur during this century. The warming was intense and spread over large parts of the Pacific Ocean and penetrated to greater depths than usual. Many eastern Pacific coral reefs that had exhibited uninterrupted growth for several hundred years until 1983 were devasted by the disturbance and are now in an erosional mode. Marine species were adversely affected. The consequent depletion of the plant food base resulted in significant reductions in stocks of fish, squid etc. This led to a mass migration and near-total reproductive failure of marine birds at Christmas Island. Emphasis in this volume is placed on disturbances to benthic communities; littoral populations; terrestrial communities and extratropical regions.EFFECTS OF ELNIA‘O 1982-83 ON BENTHOS, FISH AND FISHERIES OFF THE SOUTH AMERICAN PACIFIC COAST WOLF E. ARNTZ Alfred-Wegener-Institut fur Polar- und Meeresforschung, Columbusstrasse, D-2850 Bremerhavenanbsp;...

Title:Global Ecological Consequences of the 1982-83 El Niño-Southern Oscillation
Author:P.W. Glynn
Publisher:Elsevier - 1990-09-06


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