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Hotter temperatures and decreased rainfall increase stress on elephants older than 40 by reducing the amount of food available and prompting migrations, according to a modeling study based on 50 years of data in the Greater Virunga region of East Africa. The risks add to the threat of poaching and an increased conflict with humans as their habitats diminish.\u00a0<\/p>\n
The death of older elephants, which can live to between 60 and 70 years old, reduces the number of reproductive animals and weakens the genetic base of herds, authors including Simon Nampindo at the Wildlife Conservation Society said in the study. The fatalities also deprive younger pachyderms of guidance from older and wiser animals, leading to erratic behavior, they said.<\/p>\n
\u201cClimate change will affect the quality and condition of suitable habitat for elephants,\u201d Nampindo said in a response to a query. That will diminish \u201cfood resources available to elephants, triggering them to move longer distances in search of food and water,\u201d he added.\u00a0<\/p>\n
The study is applicable across Africa, where about 415,000 of the animals live. Botswana and Zimbabwe boast the world\u2019s biggest populations, according to Timothy Randhir, from the University of Massachusetts, who worked on the study.\u00a0<\/p>\n
A drought at the end of last year linked to the El Nino weather phenomenon forced a large migration of wild animals from Zimbabwe\u2019s largest national park. Nearly 200 elephants died due to water shortages as a result of hot temperatures, the nation\u2019s wildlife authority said. El Nino caused drier weather in southern Africa.<\/p>\n<\/div>\n