Highway Across the Serengeti. Carretera a lo largo del Serengueti. Ecología-Economía.

SERENGETI NATIONAL PARK, Tanzania — Every spring, out here on this endless sheet of yellow grass, two million wildebeest, zebras, gazelles and other grazers march north in search of greener pastures, with lions and hyenas stalking them and vultures circling above.

It is called the Great Migration, and it is widely considered one of the most spectacular assemblies of animal life on the planet.

But how much longer it will stay that way is another matter. Tanzania’s president, Jakaya Kikwete, plans to build a national highway straight through the Serengeti park, bisecting the migration route and possibly sending a thick stream of overloaded trucks and speeding buses through the traveling herds. Scientists and conservation groups paint a grim picture of what could happen next: rare animals like rhinos getting knocked down as roadkill; fences going up; invasive seeds sticking to car tires and being spread throughout the park; the migration getting blocked and the entire ecosystem becoming irreversibly damaged.

“The Serengeti ecosystem is one of the wonders of the planet,” said Anne Pusey, an evolutionary anthropologist atDuke University. “It must be preserved.” But it is election time in Tanzania, one of the poorest countries in the world, and Mr. Kikwete is embroiled in what political analysts say is the feistiest presidential race this country has seen.Few things symbolize progress better than a road; this road in particular, which will connect marginalized areas of northern Tanzania, has been one of Mr. Kikwete’s campaign promises.

“The decision’s been made,” said Salvator Rweyemamu, the president’s spokesman. “If this government comes back into power — and we will — the road will be built.” See NYT. Ver todo aquí.