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Period: to
El Nino
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1957-1958: El Nino cause damage to the California's kelp forests
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1965-1966: decline in Guano bird population in Peru. Food source scarse due to El Nino
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1972-1973: sharp drop in anchovy population
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1990-1995: longest southern oscillation event on record
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1997-1998: El Nino marks one of the strongest warm episodes in the last 50 years
